CN103782531B - Optical signal transmission method, device and optical sender - Google Patents

Abstract

The embodiment of the present invention provides a kind of optical signal transmission method, device and optical sender.Method includes: obtain the power of the first optical signal of each carrier wave correspondence output after at least one carrier wave is modulated by manipulator；The gain amplifier transmitted behind the first optical signal ECDC road according to the output of at least one carrier wave correspondence and the wavelength of carrier wave, it is determined that the power regulation factor of the first corresponding optical signal；Power regulation factor according to the first optical signal, is adjusted the power of the first corresponding optical signal in the modulator.Optical signal transmission method, device and the optical sender that the embodiment of the present invention provides, according to the gain amplifier of optical signal in transmission link and carrier wavelength, the power of each carrier wave is adjusted, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease the OSNR cost in optical signal transmission process.

Description

Optical signal transmission method, device and optical sender

Technical field

The present embodiments relate to communication technology, particularly relate to a kind of optical signal transmission method, device and optical sender.

Background technology

Along with data communication improving constantly the requirement of data transmission system, super 100G is transmitted systematic research and becomes a flash point increasingly by industry, and many esbablished corporations have all issued the model machine of 400Gb/s and 1Tb/s transfer rate.From these model machines, the development trend of following optical communication system is the optical sender based on multicarrier and high order modulation.

In prior art, the optical sender of the transmission system of more than 100G adopts integreted phontonics Integration ofTechnology laser array and modulator array.When adopting multicarrier generation technique, need to using and solve wavelength division multiplexer Demux and carrier wave is demultiplexing as the optical signal of multichannel individual wavelengths is modulated, the output of manipulator to adopt wavelength division multiplexer Mux to carry out coupling to obtain a road optical signal and pass through fiber-optic transfer.In transmission link, at a certain distance, it is necessary to adopt image intensifer that optical signal is amplified.The connection step by step of multiple image intensifers can cause optical signal gain uneven.Pump laser or raman amplifier is adopted to carry out the loss of optical signal in balance transmission link at present.

But, prior art is when wavelength of optical signal changes, it is desirable to obtain the optical communication link of flat gain, it is necessary to the deployment scheme readjusting pump laser just can make the gain of optical signal in transmission link keep smooth.

Summary of the invention

The embodiment of the present invention provides a kind of optical signal transmission method, device and optical sender, to ensure the smooth of optical signal gain in transmission link adaptively.

First aspect, the embodiment of the present invention provides a kind of optical signal transmission method, including:

Obtain each carrier wave correspondence after at least one carrier wave is modulated by manipulator and export the power of the first optical signal；The gain amplifier transmitted behind the first optical signal ECDC road according at least one carrier wave correspondence described output and the wavelength of described carrier wave, it is determined that the power regulation factor of corresponding described first optical signal；Power regulation factor according to described first optical signal, is adjusted the power of the first corresponding optical signal in described manipulator.

In the first embodiment of first aspect, the gain amplifier of transmission and the wavelength of described carrier wave behind the first optical signal ECDC road of at least one carrier wave correspondence output described in described basis, it is determined that the power regulation factor of corresponding described first optical signal, including:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of at least one carrier wave described；

Determine the power regulation factor of described first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave described.

In the second embodiment of first aspect, the gain amplifier transmitted behind first optical signal ECDC road of at least one carrier wave correspondence output described in described basis and the wavelength of described carrier wave, after determining the power regulation factor of described first optical signal of correspondence, also include:

The modulation format corresponding according to each carrier wave before modulation and order of modulation, be updated the power regulation factor of corresponding described first optical signal.

In the third embodiment of first aspect, the described modulation format corresponding according to carrier wave each before described modulation and order of modulation, the power regulation factor of corresponding described first optical signal is updated, including:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of at least one carrier wave described；

Adopt each described carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of described average emitted power with corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

In the 4th kind of embodiment of first aspect, the described order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and described carrier wave, obtain the transmitting power that each described carrier wave is corresponding, including:

According to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for described carrier wave.

In the 5th kind of embodiment of first aspect, the gain amplifier transmitted behind first optical signal ECDC road of at least one carrier wave correspondence output described in described basis and the wavelength of described carrier wave, after determining the power regulation factor of described first optical signal of correspondence, also include:

Obtain the power of the front each described carrier wave of modulation；

Frequency according to the power of each described carrier wave before modulation, the power of corresponding described first signal and at least one carrier wave described, is updated the power regulation factor of corresponding described first optical signal.

In the 6th kind of embodiment of first aspect, if the number of described carrier wave is more than or equal to four, the then described frequency according to the power of each described carrier wave before modulation, the power of corresponding described first signal and at least one carrier wave described, the power regulation factor of corresponding described first optical signal is updated, including:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of described first signal, and P2 is the power of each described carrier wave before modulation；

Adopt the non-liner revision coefficient that each described carrier wave is corresponding to be multiplied with the power regulation factor of corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

Second aspect, the embodiment of the present invention provides a kind of light signal transmission device, including:

Detection module, for obtaining the power of the first optical signal of each carrier wave correspondence output after at least one carrier wave is modulated by manipulator；Adjusting module, for the wavelength of the gain amplifier transmitted behind the first optical signal ECDC road according at least one carrier wave correspondence described output and described carrier wave, it is determined that the power regulation factor of corresponding described first optical signal；Power regulation factor according to described first optical signal, is adjusted the power of the first corresponding optical signal in described manipulator.

In the first embodiment of second aspect, described adjusting module specifically for:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of described at least one carrier wave；

Determine the power regulation factor of described first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave described.

In the second embodiment of second aspect, described adjusting module is additionally operable to:

The modulation format corresponding according to each carrier wave before modulation and order of modulation, be updated the power regulation factor of corresponding described first optical signal.

In the third embodiment of second aspect, described adjusting module specifically for:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of at least one carrier wave described；

Adopt each described carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of described average emitted power with corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

In the 4th kind of embodiment of second aspect, described adjusting module specifically for:

According to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for described carrier wave.

In the 5th kind of embodiment of second aspect, it is characterised in that

Described detection module is additionally operable to:

Obtain the power of the front each described carrier wave of modulation；Accordingly,

Described adjusting module is additionally operable to:

The frequency of power according to described secondary signal, the power of corresponding described first signal and at least one carrier wave described, is updated the power regulation factor of corresponding described first optical signal.

In the 5th kind of embodiment of second aspect, if the number of described carrier wave is more than or equal to four, described adjusting module is additionally operable to:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of described first signal, and P2 is the power of each described carrier wave before modulation；

Adopt the non-liner revision coefficient that each described carrier wave is corresponding to be multiplied with the power regulation factor of corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

The third aspect, the embodiment of the present invention provides a kind of optical sender, including:

Shunt, combiner and manipulator；Described manipulator is used for: after at least one carrier wave is modulated, each carrier wave correspondence exports the first optical signal；Obtain the power of described first optical signal；The gain amplifier transmitted behind the first optical signal ECDC road according at least one carrier wave correspondence described output and the wavelength of described carrier wave, it is determined that the power regulation factor of corresponding described first optical signal；Power regulation factor according to described first optical signal, is adjusted the power of the first corresponding optical signal.

In the first embodiment of the third aspect, described manipulator specifically for:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of at least one carrier wave described；

Determine the power regulation factor of described first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave described.

In the second embodiment of the third aspect, described manipulator is additionally operable to:

The modulation format corresponding according to each carrier wave before adjusting and order of modulation, be updated the power regulation factor of corresponding described first optical signal.

In the third embodiment of the third aspect, described manipulator specifically for:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of at least one carrier wave described；

Adopt each described carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of described average emitted power with corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

In the 4th kind of embodiment of the third aspect, described manipulator specifically for:

According to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for described carrier wave.

In the 5th kind of embodiment of the third aspect, described manipulator is additionally operable to:

Obtain the power of the front each described carrier wave of modulation；

The frequency of power according to described secondary signal, the power of corresponding described first signal and at least one carrier wave described, is updated the power regulation factor of corresponding described first optical signal.

In the 6th kind of embodiment of the third aspect, if the number of described carrier wave is more than or equal to four, described manipulator is additionally operable to:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of described first signal, and P2 is the power of each described carrier wave before modulation；

Adopt the non-liner revision coefficient that each described carrier wave is corresponding to be multiplied with the power regulation factor of corresponding described first optical signal, the power regulation factor of corresponding described first optical signal is updated.

Optical signal transmission method, device and the optical sender that the embodiment of the present invention provides, in the modulator the power of each carrier light signal of output after modulation is adjusted according to the gain amplifier of optical signal in transmission link and carrier wavelength, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease the OSNR cost in optical signal transmission process.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, introduce the accompanying drawing used required in embodiment or description of the prior art is done one simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The flow chart of a kind of optical signal transmission method that Fig. 1 provides for the embodiment of the present invention；

The flow chart of the another kind of optical signal transmission method that Fig. 2 provides for the embodiment of the present invention；

The flow chart of another optical signal transmission method that Fig. 3 provides for the embodiment of the present invention；

The structural representation of a kind of light signal transmission device that Fig. 4 provides for the embodiment of the present invention；

The structure diagram of a kind of optical sender that Fig. 5 provides for the embodiment of the present invention.

Detailed description of the invention

For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.

The flow chart of a kind of optical signal transmission method that Fig. 1 provides for the embodiment of the present invention, as it is shown in figure 1, the optical signal transmission method for executive agent, the present embodiment provided with light signal transmission device illustrates, light signal transmission device can be optical sender.The optical signal transmission method of the present embodiment may include that

At least one carrier wave is modulated rear each carrier wave correspondence and exports the power of the first optical signal by S110, acquisition manipulator.

Carrier wave is carried out decomposition and obtains at least one carrier wave by optical sender employing multi-transceiver technology, and after this at least one carrier wave input modulator, each carrier wave obtains the first optical signal after being modulated.Light signal transmission device can adopt the mode of feedback to detect the power of manipulator the first optical signal.

S120, according to the gain amplifier of transmission behind the first optical signal ECDC road of at least one carrier wave correspondence output and the wavelength of carrier wave, it is determined that the power regulation factor of the first corresponding optical signal.

If it should be noted that the number of carrier wave is 1, behind Ze He road, output is still this carrier wave itself.At least one carrier wave forms a carrier wave after wavelength division multiplexer Mux couples, and this carrier wave being again coupled into will be transmitted by optical fiber link.In this step, light signal transmission device can obtain the gain amplifier in optical fiber link of the carrier wave after coupling and the respective wavelength of each carrier wave before coupling.Thus determine the power regulation factor of the first optical signal of each carriers carry according to the wavelength of gain amplifier and each carrier wave.

S130, power regulation factor according to the first optical signal, be adjusted the power of the first corresponding optical signal in the modulator.

After in the modulator the power of the first optical signal being adjusted, it is possible to make the power of the first optical signal that manipulator exports change, ensure that the smooth of the gain of optical signal in transmission link adaptively.

The optical signal transmission method that the present embodiment provides, in the modulator the power of the optical signal of each carrier wave of output after modulation is adjusted according to the gain amplifier of optical signal in transmission link and carrier wavelength, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease OSNR (OpticalSignalToNoiseRatio, hereinafter referred to as the OSNR) cost in optical signal transmission process.

Further, the gain amplifier transmitted behind the first optical signal ECDC road according to the output of at least one carrier wave correspondence and the wavelength of carrier wave, determine the power regulation factor of the first optical signal of correspondence, including: according to gain amplifier, obtain the yield value that the wavelength of each carrier wave is corresponding；The yield value that wavelength according to each carrier wave is corresponding, it is determined that the gain meansigma methods (if the number of carrier wave is 1, then gain meansigma methods is the yield value that this carrier wavelength is corresponding) of at least one carrier wave；Determine the power regulation factor of the first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of each carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave.

Specifically, the gain curve in transmission link can adopt many wave sources and spectro-metre to be measured, if using the image intensifer of commercialization in transmission link, then when image intensifer dispatches from the factory, the parameter such as gain curve would generally be listed in detail in user's manual.Assuming in optical sender, four carrier waves to be modulated, optical sender according to four respective wavelength of carrier wave, can find the yield value that respective wavelength is corresponding respectively from gain curve, it is assumed that the yield value of four carrier wave correspondences respectively is G₁、G₂、G₃And G₄.The gain meansigma methods of four carrier waves isSo power regulation factor of the first optical signal that first carrier wave is corresponding in four carrier wavesWherein I is the initial regulation coefficient of the first optical signal, it is possible to be set to the gain meansigma methods of these four carrier waves, it is also possible to be set to the transmitting power meansigma methods etc. of these four carrier waves.This initial regulation coefficient is for carrying out basic adjustment to the power of the first optical signal, it is also possible to take I=1 as required.The acquisition methods of the power regulation factor of the first optical signal that other carrier wave is corresponding is similar.

The flow chart of the another kind of optical signal transmission method that Fig. 2 provides for the embodiment of the present invention, as in figure 2 it is shown, the optical signal transmission method for executive agent, the present embodiment provided with light signal transmission device illustrates, light signal transmission device can be optical sender.The optical signal transmission method of the present embodiment is on the basis of the S110～S130 of embodiment illustrated in fig. 1, it is possible to include further:

S240, according to modulation format corresponding to each carrier wave and order of modulation before modulation, the power regulation factor of the first corresponding optical signal is updated.

For example with high order quadrature amplitude modulation (QuadratureAmplitudeModulation, hereinafter referred to as QAM) modulation format, each carrier wave before modulation being modulated, its order of modulation is M.So according to order of modulation M corresponding to the characteristic of this modulation format and each carrier wave, respectively the power regulation factor of the first optical signal of each carrier wave can be updated.

Further, the modulation format corresponding according to each carrier wave before modulation and order of modulation, the power regulation factor of the first corresponding optical signal is updated, including: the order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and carrier wave, obtain the transmitting power that each carrier wave is corresponding, and obtain the average emitted power (if the number of carrier wave is 1, then average emitted power is the transmitting power of this carrier wave itself) of at least one carrier wave；Adopt each carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of average emitted power with the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

Specifically, to adopt mQAM(m rank quadrature amplitude modulation) modulation format the carrier wave before modulation is modulated, single carrier wave needs when reaching a certain bit error rate preset, the order of modulation M of this carrier wave and its transmitting power P_sNNeed to meet certain requirement, when the known bit error rate and order of modulation M, it is possible to know the transmitting power P of this carrier wave_sN.It will again be assumed that four carrier waves are modulated, obtain the transmitting power P of four carrier waves respectively_s1、P_s2、P_s3And P_s4, then in four carrier waves, the power modulation factor of the first optical signal that first carrier wave is corresponding can be updated to:

$A=I\×(I-\frac{|G_1-G|}{G})\×\frac{P_{s1}}{(P_{s1}+P_{s2}+P_{s3}+P_{s4})/4}.$

The update method of the power regulation factor of the first optical signal that other carrier wave is corresponding is similar, and the power regulation factor of the first corresponding optical signal can be updated to:

Wherein, P_sAverage emitted power at least two carrier wave.

Further, the order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and carrier wave, obtain the transmitting power that each carrier wave is corresponding, including: according to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in high order quadrature amplitude modulation, M_NFor the order of modulation of carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for carrier wave.

Briefly, in mQAM modulation, error rate BER, order of modulation M_NAnd the transmitting power P that carrier wave is corresponding_sNBetween relation specifically: $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}).$

The optical signal transmission method that the present embodiment provides, in the modulator the power of the optical signal of each carrier wave of output after modulation is adjusted according to the gain amplifier of optical signal in transmission link and carrier wavelength, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；Always according to the power between the balanced each carrier wave of the modulation format of each carrier wave；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease the OSNR cost in optical signal transmission process.

The flow chart of another optical signal transmission method that Fig. 3 provides for the embodiment of the present invention, as it is shown on figure 3, the optical signal transmission method for executive agent, the present embodiment provided with light signal transmission device illustrates, light signal transmission device can be optical sender.The optical signal transmission method of the present embodiment is at the S110～S130 of embodiment illustrated in fig. 1, or on the basis of the S110～S240 of embodiment illustrated in fig. 2, it is possible to include further:

The power of each carrier wave before S350, acquisition modulation；Frequency according to the power of each carrier wave before modulation, the power of the first corresponding signal and at least one carrier wave, is updated the power regulation factor of the first corresponding optical signal.

Further, if the number of carrier wave is be more than or equal to four, then the frequency according to the power of each carrier wave before modulation, the power of the first corresponding signal and at least one carrier wave, is updated the power regulation factor of the first corresponding optical signal, including: judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of any four carrier wave；Then: f_ijkThe non-liner revision coefficient of corresponding carrier wavef_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of the first signal, and P2 is the power of each carrier wave before modulation；Adopt the non-liner revision coefficient that each carrier wave is corresponding to be multiplied with the power regulation factor of the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

Specifically, it is contemplated that the impact of mission nonlinear effect, for instance the impact that four-wave mixing effect brings, optical sender can first determine whether in multicarrier, whether the frequency of any four carrier wave meets f_ijk=f_i+f_j-f_k.Frequency respectively f is described when the frequency of certain four carrier wave meets relation above_i、f_jAnd f_kCarrier wave by power transmission, to give frequency be f_ijkCarrier wave.By frequency respectively f_i、f_j、f_kAnd f_ijkThe power that shifts respectively of carrier wave quantify, it may be assumed that f_ijkThe non-liner revision coefficient of corresponding carrier wavef_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier wave

So, the power modulation factor of the first optical signal that carrier wave is corresponding can be updated to:

$A=I\×(I-\frac{{|G}_1-G|}{G})\×F,$ Or

$A=I\×(I-\frac{{|G}_N-G|}{G})\×\frac{P_{\mathrm{sN}}}{P_s}\×F.$

The optical signal transmission method that the present embodiment provides, in the modulator the power of the optical signal of each carrier wave of output after modulation is adjusted according to the gain amplifier of optical signal in transmission link and carrier wavelength, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；And the power that the modulation format according to each carrier wave is balanced between each carrier wave；The power of the optical signal of each carrier wave of output after modulation is adjusted in adjustor always according to the frequency of each carrier wave further, to reduce the impact that optical signal transmission is brought by nonlinear effect；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease the OSNR cost in optical signal transmission process.

When the wavelength shift of the image intensifer in the modulation system that optical sender adopts, number of carrier wave, transmission link and carrier wave, the optical signal transmission method that the embodiment of the present invention provides does adaptive adjustment without light signal transmission system is made the power again planning the optical signal namely can optical sender launched.

In the optical signal transmission method provided in above-described embodiment, the acquisition of the power regulation factor of the first optical signal and renewal, it is possible to adopt the mode of matrix operations.Such as, still so that four carrier waves are modulated:

The first step: determine initial regulation coefficient matrix I=[I, I, I, I] of the first optical signal；

Second step: determine the first power regulation factor matrix: A of the first optical signal_N=[A₁,A₂,A₃,A₄], whereinG_NFor the yield value that the wavelength of each carrier wave is corresponding, G is the gain meansigma methods of four carrier waves.

3rd step: determine that the first power regulation factor of the first optical signal updates matrix:Wherein, P_s1、P_s2、P_s3And P_s4The respectively transmitting power of four carrier waves, P_sBe the average emitted power of four carrier waves, i.e. P_s=(P_s1+P_s2+P_s3+P_s4)/4。

4th step: if four carrier waves meet f₄=f₁+f₂-f₃, wherein f₁、f₂、f₃And f₄The respectively frequency of these four carrier waves；Then determine that the second power regulation factor of the first optical signal updates matrix: $F_N=[I+\frac{{P2}_1-{P1}_1}{{P1}_1},I+\frac{{P2}_2-{P1}_2}{{P1}_2},I+\frac{{P2}_3-{P1}_3}{{P1}_3},I-\frac{{P2}_4-{P1}_4}{{P1}_4}],$ P1 is the power of the first signal, and P2 is the power of carrier wave before modulation.

5th step: the power regulation factor the matrix so power of the first optical signal corresponding to these four carrier waves being adjusted, it is possible to adopt matrix I and A_NProduct, it would however also be possible to employ matrix I, A_NAnd P_NThe product of three, it is also possible to adopt matrix I, A_N、P_NAnd F_NThe product of three.Power matrix by by the first optical signal of power regulation factor matrix and four carrier waves: [P1₁,P1₂,P1₃,P1₄] be multiplied, the power of the first optical signal of four carrier waves is adjusted.

Implementation of the present invention can apply in wavelength-division multiplex (WavelengthDivisionMultiplexing, hereinafter referred to as the WDM) high speed transmission system of super 100G.In prior art, for the luminous power of balanced each channel, can adopt adjustable attenuator that the power of the optical signal of each channel before entering wavelength division multiplexer is adjusted according to feedback signal.The signal to noise ratio that feedback signal is usually according to channel obtains.Reduce the channel light power that signal to noise ratio is higher, improve the luminous power of the relatively low channel of signal to noise ratio.But power budget is more nervous in the WDM high speed transmission system of super 100G, the power requirement such as entering the optical signal of photomodulator is more than 10dBm, the optical signal power entered transmission link from photomodulator need at more than 3dBm, if increasing adjustable attenuator in systems will reduce the luminous power of manipulator output optical signal, the luminous power entered in link would become hard to reach more than 3dBm.Under this situation, by the application of the embodiment of the present invention, in the modulator the luminous power of the optical signal of each carrier wave of output after modulation is carried out the adjustment of preemphasis, thus ensureing that the luminous power that in simple optical fiber, optical signal is total is constant, the power that such as carrier wave is total before modulation is 6dBm, and the general power still keeping optical signal after modulation is 6dBm.Therefore, realize in process in the embodiment of the present invention, it is possible to preset the luminous power in each channel, thus realizing the equilibrium of luminous power in wdm system.Without increasing the devices such as adjustable attenuator in WDM high speed transmission system.

The structural representation of a kind of light signal transmission device that Fig. 4 provides for the embodiment of the present invention, as shown in Figure 4, the light signal transmission device 400 that the present embodiment provides may include that

Detection module 410, for obtaining the power of the first optical signal of each carrier wave correspondence output after at least one carrier wave is modulated by manipulator.

Adjusting module 420, for the wavelength of the gain amplifier transmitted behind the first optical signal ECDC road according to the output of at least one carrier wave correspondence and carrier wave, it is determined that the power regulation factor of the first corresponding optical signal；Power regulation factor according to the first optical signal, is adjusted the power of the first corresponding optical signal in the modulator.

The light signal transmission device 400 that the present embodiment provides, it is possible to for performing the technical scheme of the arbitrary shown embodiment of the method in Fig. 1～3, it is similar with technique effect that it realizes principle, repeats no more herein.

Further, adjusting module 420 specifically for: according to gain amplifier, obtain the yield value that the wavelength of each carrier wave is corresponding；The yield value that wavelength according to each carrier wave is corresponding, it is determined that the gain meansigma methods of at least one carrier wave；Determine the power regulation factor of the first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of each carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave.

Further, adjusting module 420 is additionally operable to: the modulation format corresponding according to each carrier wave before modulation and order of modulation, and the power regulation factor of the first corresponding optical signal is updated.

Further, adjusting module 420 specifically for: according to the bit error rate preset in high order quadrature amplitude modulation and the order of modulation of carrier wave, obtain the transmitting power that each carrier wave is corresponding, and obtain the average emitted power of at least one carrier wave；Adopt each carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of average emitted power with the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

Further, adjusting module 420 specifically for: according to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in high order quadrature amplitude modulation, M_NFor the order of modulation of carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for carrier wave.

Further, detection module 410 is additionally operable to: obtain the power of the front each carrier wave of modulation；Accordingly, adjusting module 420 is additionally operable to: the frequency according to the power of secondary signal, the power of the first corresponding signal and at least one carrier wave, and the power regulation factor of the first corresponding optical signal is updated.

Further, if the number of carrier wave is more than or equal to four, adjusting module 420 is additionally operable to: judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of any four carrier wave；Then: f_ijkThe non-liner revision coefficient of corresponding carrier wavef_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of the first signal, and P2 is the power of each described carrier wave before modulation；Adopt the non-liner revision coefficient that each carrier wave is corresponding to be multiplied with the power regulation factor of the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

The light signal transmission device 400 that the present embodiment provides, it is possible to for performing the technical scheme of preceding method embodiment, it is similar with technique effect that it realizes principle, repeats no more herein.

The structure diagram of a kind of optical sender that Fig. 5 provides for the embodiment of the present invention, as it is shown in figure 5, the optical sender 500 that the present embodiment provides may include that

Shunt 510, combiner 520 and manipulator 530.Shunt 510 can be such as solve wavelength division multiplexer Demux, and combiner 520 can be such as wavelength division multiplexer Mux.

Manipulator 530 is used for: after at least one carrier wave is modulated, each carrier wave correspondence exports the first optical signal；Obtain the power of the first optical signal；The gain amplifier transmitted behind the first optical signal ECDC road according to the output of at least one carrier wave correspondence and the wavelength of carrier wave, it is determined that the power regulation factor of the first corresponding optical signal；Power regulation factor according to the first optical signal, is adjusted the power of the first corresponding optical signal.

The optical sender 500 that the present embodiment provides, it is possible to for performing the technical scheme of the arbitrary shown embodiment of the method for Fig. 1～Fig. 3, it is similar with technique effect that it realizes principle, repeats no more herein.

Further, manipulator 530 specifically for: according to gain amplifier, obtain the yield value that the wavelength of each carrier wave is corresponding；The yield value that wavelength according to each carrier wave is corresponding, it is determined that the gain meansigma methods of at least one carrier wave；Determine the power regulation factor of the first optical signalWherein: I is the initial regulation coefficient of the first optical signal, G_NFor the yield value that the wavelength of each carrier wave is corresponding, G is the gain meansigma methods of at least one carrier wave.

Further, manipulator 530 is additionally operable to: the modulation format corresponding according to each carrier wave before adjusting and order of modulation, and the power regulation factor of the first corresponding optical signal is updated.

Further, manipulator 530 specifically for: according to the bit error rate preset in high order quadrature amplitude modulation and the order of modulation of carrier wave, obtain the transmitting power that each carrier wave is corresponding, and obtain the average emitted power of at least one carrier wave；Adopt each carrier wave correspondence transmitting power to be multiplied with the power regulation factor of the ratio of average emitted power with the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

Further, manipulator 530 specifically for: according to $\mathrm{BER}\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}\mathrm{erfc}(\frac{3}{2(M_N-1)}\·\frac{P_{\mathrm{sN}}}{N_0{R}_{\mathrm{sN}}}),$ Obtain the transmitting power P that each carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in high order quadrature amplitude modulation, M_NFor the order of modulation of carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for carrier wave.

Further, manipulator 530 is additionally operable to: obtain the power of the front each carrier wave of modulation；The frequency of power according to secondary signal, the power of the first corresponding signal and at least one carrier wave, is updated the power regulation factor of the first corresponding optical signal.

Further, if the number of carrier wave is more than or equal to four, manipulator 530 is additionally operable to: judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of any four carrier wave；Then: f_ijkThe non-liner revision coefficient of corresponding carrier wavef_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal, and P1 is the power of the first signal, and P2 is the power of each described carrier wave before modulation；Adopt the non-liner revision coefficient that each carrier wave is corresponding to be multiplied with the power regulation factor of the first corresponding optical signal, the power regulation factor of the first corresponding optical signal is updated.

The optical sender 500 that the present embodiment provides, it is possible to for performing the technical scheme of the arbitrary shown embodiment of the method for Fig. 1～Fig. 3, it is similar with technique effect that it realizes principle, repeats no more herein.

In sum, optical signal transmission method, device and the optical sender that the embodiment of the present invention provides, according to the gain amplifier of optical signal in transmission link and carrier wavelength, the power of each carrier wave is adjusted, thus ensure that the smooth of the gain of optical signal in transmission link adaptively；And the power that the modulation format according to each carrier wave is balanced between each carrier wave；Always according to the frequency of each carrier wave, the power of the first optical signal is adjusted further, to reduce the impact that optical signal transmission is brought by nonlinear effect；The use even avoiding pump laser or image intensifer etc. in light signal transmission system can be reduced, decrease the OSNR cost in optical signal transmission process.

One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer read/write memory medium, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.

Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (21)

1. an optical signal transmission method, it is characterised in that including:

Obtain the power of the first optical signal of each carrier wave correspondence output after multiple carrier waves are modulated by manipulator；

The wavelength of each described carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road according to the output of the plurality of carrier wave correspondence and conjunction road, it is determined that the power regulation factor of the first optical signal of each described carrier wave correspondence output；

The power regulation factor of the first optical signal according to the output of each described carrier wave correspondence, is adjusted the power of the first optical signal of each described carrier wave correspondence output in described manipulator.

2. method according to claim 1, it is characterized in that, described according to the wavelength of each described carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road of the plurality of carrier wave correspondence output and conjunction road, determine the power regulation factor of the first optical signal that each described carrier wave correspondence exports, including:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of the plurality of carrier wave；

Determine the power regulation factor of the first optical signal that each described carrier wave correspondence exportsWherein: I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of the plurality of carrier wave.

3. method according to claim 1, it is characterized in that, described according to the wavelength of each described carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road of the plurality of carrier wave correspondence output and conjunction road, after determining the power regulation factor of the first optical signal that each described carrier wave correspondence exports, also include:

The modulation format corresponding according to each carrier wave before modulation and order of modulation, be updated the power regulation factor of the first optical signal of each described carrier wave correspondence output.

4. method according to claim 3, it is characterised in that the described modulation format corresponding according to each carrier wave before modulation and order of modulation, is updated the power regulation factor of the first optical signal of each described carrier wave correspondence output, including:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and each described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of the plurality of carrier wave；

The power regulation factor adopting the first optical signal of each described carrier wave correspondence transmitting power output corresponding to each described carrier wave the ratio of described average emitted power is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.

5. method according to claim 4, it is characterised in that the described order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and each described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, including:

According to $BER\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}erfc(\frac{3}{2(M_N-1)}\·\frac{P_{sN}}{N_0{R}_{sN}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of each described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for each described carrier wave.

6. method according to any one of claim 1 to 5, it is characterized in that, described according to the wavelength of each described carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road of the plurality of carrier wave correspondence output and conjunction road, after determining the power regulation factor of the first optical signal that each described carrier wave correspondence exports, also include:

Obtain the power of the front each described carrier wave of modulation；

Frequency according to the power of each described carrier wave before modulation, the power of the first signal of each described carrier wave correspondence output and the plurality of carrier wave, is updated the power regulation factor of the first optical signal of each described carrier wave correspondence output.

7. method according to claim 6, it is characterized in that, if the number of described carrier wave is more than or equal to four, the then described frequency according to the power of each described carrier wave before modulation, the power of the first signal of each described carrier wave correspondence output and the plurality of carrier wave, the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated, including:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, and P1 is the power of the first signal of described each described carrier wave correspondence output, and P2 is the power of each described carrier wave before modulation；

The power regulation factor adopting the first optical signal of the non-liner revision coefficient output corresponding to each described carrier wave that each described carrier wave is corresponding is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.

8. a light signal transmission device, it is characterised in that including:

Detection module, for obtaining the power of the first optical signal of each carrier wave correspondence output after multiple carrier waves are modulated by manipulator；

Adjusting module, for the wavelength of each described carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road according to the output of the plurality of carrier wave correspondence and conjunction road, it is determined that the power regulation factor of the first optical signal of each described carrier wave correspondence output；The power regulation factor of the first optical signal according to the output of each described carrier wave correspondence, is adjusted the power of the first optical signal of each described carrier wave correspondence output in described manipulator.

9. device according to claim 8, it is characterised in that described adjusting module specifically for:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of the plurality of carrier wave；

Determine the power regulation factor of the first optical signal that each described carrier wave correspondence exportsWherein: I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of the plurality of carrier wave.

10. device according to claim 8, it is characterised in that described adjusting module is additionally operable to:

The modulation format corresponding according to each carrier wave before modulation and order of modulation, be updated the power regulation factor of described first optical signal of each described carrier wave correspondence output.

11. device according to claim 10, it is characterised in that described adjusting module specifically for:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and each described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of the plurality of carrier wave；

The power regulation factor adopting the first optical signal of each described carrier wave correspondence transmitting power output corresponding to each described carrier wave the ratio of described average emitted power is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.

12. device according to claim 11, it is characterised in that described adjusting module specifically for:

According to $BER\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}erfc(\frac{3}{2(M_N-1)}\·\frac{P_{sN}}{N_0{R}_{sN}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of each described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for each described carrier wave.

13. the device according to any one of according to Claim 8～12, it is characterised in that

Described detection module is additionally operable to:

Obtain the power of the front each described carrier wave of modulation；Accordingly,

Described adjusting module is additionally operable to:

Frequency according to the power of each described carrier wave before modulation, the power of described first signal of each described carrier wave correspondence output and the plurality of carrier wave, is updated the power regulation factor of the first optical signal of each described carrier wave correspondence output.

14. device according to claim 13, it is characterised in that if the number of described carrier wave is more than or equal to four, described adjusting module is additionally operable to:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, and P1 is the power of the first signal of described each described carrier wave correspondence output, and P2 is the power of each described carrier wave before modulation；

The power regulation factor adopting the first optical signal of the non-liner revision coefficient output corresponding to each described carrier wave that each described carrier wave is corresponding is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.

15. an optical sender, it is characterised in that including:

Shunt, combiner and manipulator；

Described manipulator is used for: after multiple carrier waves are modulated, each carrier wave correspondence exports the first optical signal；Obtain the power of the first optical signal of each described carrier wave correspondence output；The wavelength of each carrier wave before the gain amplifier transmitted behind the first optical signal ECDC road according to the output of the plurality of carrier wave correspondence and conjunction road, it is determined that the power regulation factor of the first optical signal of each described carrier wave correspondence output；Power regulation factor according to described first optical signal, is adjusted the power of the first optical signal of each described carrier wave correspondence output.

16. optical sender according to claim 15, it is characterised in that described manipulator specifically for:

According to described gain amplifier, obtain the yield value that the wavelength of each described carrier wave is corresponding；

The yield value that wavelength according to each described carrier wave is corresponding, it is determined that the gain meansigma methods of the plurality of carrier wave；

Determine the power regulation factor of the first optical signal that each described carrier wave correspondence exportsWherein: I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, G_NFor the yield value that the wavelength of described each described carrier wave is corresponding, G is the gain meansigma methods of the plurality of carrier wave.

17. optical sender according to claim 15, it is characterised in that described manipulator is additionally operable to:

The modulation format corresponding according to each carrier wave before adjusting and order of modulation, be updated the power regulation factor of the first optical signal of each described carrier wave correspondence output.

18. optical sender according to claim 17, it is characterised in that described manipulator specifically for:

Order of modulation according to the bit error rate preset in high order quadrature amplitude modulation and each described carrier wave, obtains the transmitting power that each described carrier wave is corresponding, and obtains the average emitted power of the plurality of carrier wave；

The power regulation factor adopting the first optical signal of each described carrier wave correspondence transmitting power output corresponding to each described carrier wave the ratio of described average emitted power is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.

19. optical sender according to claim 18, it is characterised in that described manipulator specifically for:

According to $BER\≈\frac{2(1-\frac{1}{\sqrt{M_N}})}{{\log }_2\left(M_N\right)}erfc(\frac{3}{2(M_N-1)}\·\frac{P_{sN}}{N_0{R}_{sN}}),$ Obtain the transmitting power P that each described carrier wave is corresponding_sN, wherein, BER is the bit error rate preset in described high order quadrature amplitude modulation, M_NFor the order of modulation of each described carrier wave,N₀For the spectral density of white Gaussian noise, R_sNCharacter rate for each described carrier wave.

20. the optical sender according to any one of claim 15～19, it is characterised in that described manipulator is additionally operable to:

Obtain the power of the front each described carrier wave of modulation；

Frequency according to the power of each described carrier wave before modulation, the power of corresponding described first signal and the plurality of carrier wave, is updated the power regulation factor of the first optical signal of each described carrier wave correspondence output.

21. optical sender according to claim 20, it is characterised in that if the number of described carrier wave is more than or equal to four, described manipulator is additionally operable to:

Judge f_ijk=f_i+f_j-f_k, wherein f_ijk、f_i、f_jAnd f_kThe respectively frequency of described any four carrier wave；Then:

f_ijkThe non-liner revision coefficient of corresponding carrier wave

f_i、f_jOr f_kThe non-liner revision coefficient of corresponding carrier waveWherein I is the initial regulation coefficient of the first optical signal of each described carrier wave correspondence output, and P1 is the power of described first signal of each described carrier wave correspondence output, and P2 is the power of each described carrier wave before modulation；

The power regulation factor adopting described first optical signal of the non-liner revision coefficient output corresponding to each described carrier wave that each described carrier wave is corresponding is multiplied, and the power regulation factor of the first optical signal of each described carrier wave correspondence output is updated.