CN101834671A - Device for realizing single driving modulation of frequency shift keying light modulation signal - Google Patents
Device for realizing single driving modulation of frequency shift keying light modulation signal Download PDFInfo
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- CN101834671A CN101834671A CN 201010160142 CN201010160142A CN101834671A CN 101834671 A CN101834671 A CN 101834671A CN 201010160142 CN201010160142 CN 201010160142 CN 201010160142 A CN201010160142 A CN 201010160142A CN 101834671 A CN101834671 A CN 101834671A
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Abstract
The invention provides a device for realizing single driving modulation of a frequency shift keying (FSK) light modulation signal in the technical field of optical fiber communication. The device comprises a tunable laser, a single driving Mach-Zehnder modulator, a radio frequency signal generator, a data source, an electrical adder and an optical filter, wherein the tunable laser is connected with the single driving Mach-Zehnder modulator to transmit an optical signal carrier; the radio frequency signal generator is connected with the electrical adder to transmit a high frequency electrical signal; the data source is connected with the electrical adder to transmit a frequency-adjustable electrical signal; the output end of the electrical adder is connected with a radio frequency interface of the single driving Mach-Zehnder modulator to transmit an added electrical signal; and the output end of the single driving Mach-Zehnder modulator is connected with the optical filter to transmit an optical signal with a central band and two side bands. The device has the advantages of simple structure, low cost, easy modulation and capability of avoiding chirp and producing an effective FSK light modulation signal.
Description
Technical field
What the present invention relates to is a kind of device of technical field of optical fiber communication, specifically is a kind of single modulation implement device that drives of frequency shift keying (FSK) optical modulation signal.
Background technology
Frequency shift keying (FSK) light modulating signal is to carry signal by the difference of control optical carrier frequency, has important use and be worth in optical fiber communication.Compare with differential phase keying (DPSK), amplitude shift keying light modulating signal, frequency shift keying (FSK) optical modulation signal is least responsive to nonlinear fiber damage, and having constant envelope, the amplitude of carrying out is modulated again, so this yard type has good application in EPON and optical packet switch network.Frequency shift keying (FSK) optical modulation signal can adopt the balanced reciver demodulation, and receiving sensitivity improves 3dB than single-ended detector, and the tolerance of chromatic dispersion simultaneously also can improve greatly.But existing frequency shift keying (FSK) optical modulation signal generation device all exists the modulation technique complexity, problems such as modulation rate is low, volume is big, device costliness.
Through existing literature search is found, " IEEE JOURNAL OF LIGHTWAVE TECHNOLOGY " (" IEEE lightwave technology periodical ") rolled up in " Performance Implications of Wide-Band Lasers for FSK ModulationLabeling Scheme (wideband laser is to the performance impact of frequency shift keying modulation label scheme) " in 2004 the 16th, the device that the direct modulated laser of a kind of rf signal produces frequency shift keying (FSK) optical modulation signal has been proposed, this device connects laser by radio-frequency signal source, directly produces frequency shift keying (FSK) optical modulation signal.But this technology forms easily and warbles owing to adopt the internal modulation technology, and modulation rate is restricted, and is tens Mbit/s.
Find by retrieval again, " IEEE JOURNAL OF LIGHTWAVE TECHNOLOGY " (" IEEE lightwave technology periodical ") rolled up in " High-Speed Optical FSK Modulator for Optical Packet Labeling (being applied to the high-speed light fsk modulator in the light packet switching) " in 2005 the 23rd, the device that a kind of use single side-band modulator (SSB) produces frequency shift keying (FSK) optical modulation signal is proposed, this device is by a tunable laser, a single side-band modulator, a data source, a radio-frequency signal source and electric phase shifter, the electricity power splitter is formed, wherein: a pair of frequency that radio-frequency signal source produces is identical, the radiofrequency signal that the phase phasic difference is 90 ° is added on the radio frequency electrode of single side-band modulator, the data-signal that data source produces is loaded on the bias electrode of single side-band modulator, by the output of control signal, thereby realize the frequency shift keying modulation.But single side-band modulator needs two Mach zehnder modulators in this technology, and complex structure costs an arm and a leg, and needs the phase relation between strict each road radiofrequency signal of control simultaneously, has increased the difficulty of modulation.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, proposed a kind of single modulation implement device that drives of frequency shift keying (FSK) optical modulation signal.The present invention only uses single Mach zehnder modulators that drives to carry out the light wave modulation, simple in structure, cost is low, the center band that modulation simultaneously produces and the amplitude of two sideband signals are just in time complementary, get final product any one sideband of filtering by optical filter, need not the phase relation of control signal, thereby greatly reduce the difficulty of frequency shift keying light modulation.
The present invention is achieved by the following technical solutions:
The present invention includes: tunable laser, single Mach zehnder modulators that drives, radio-frequency signal generator, data source, electrical adder, and optical filter, wherein: tunable laser links to each other with a single driving Mach zehnder modulators input and transmits optical carrier, an input of radio-frequency signal generator and the electrical adder carry high frequency electrical signals that links to each other, another input of data source and electrical adder adjustable signal of telecommunication of transmission amplitude that links to each other, the output of electrical adder and single link to each other signal of telecommunication after the transmission addition of Mach zehnder modulators radio frequency interface that drives, single output that drives the Mach zehnder modulators links to each other with optical filter and transmits the light signal that contains center band and two sidebands of generation.
Described single offset port that drives the Mach zehnder modulators is provided with DC power supply.
Described tunable laser and described single the driving between the Mach zehnder modulators are provided with Polarization Controller.
Described optical filter filtering produce about in two sideband signals one of them, comprise: optical circulator and Fiber Bragg Grating FBG, wherein: first port of optical circulator links to each other with single driving Mach zehnder modulators and transmits the light signal that contains center band and two sidebands, and second port of optical circulator links to each other with Fiber Bragg Grating FBG and transmit the light signal that contains center band and two sidebands.
Described single minimum point that the Mach zehnder modulators is biased in transmission curve that drives.
Described tunable laser output continuous laser.
The high-speed radio-frequency sinusoidal signal that described radio-frequency signal generator output amplitude is adjustable.
Described data source produces the adjustable unipolarity signal of telecommunication of amplitude.
Described electrical adder carries out addition with the radiofrequency signal of radiofrequency signal generator and the signal of data source generation, and the signal after the addition is passed to single Mach zehnder modulators that drives.
Operation principle of the present invention is: by the unipolarity signal of telecommunication and high-frequency signal addition, and modulated optical carrier, single driving Mach zehnder modulators is offset to the minimum point of transmission curve, and the output signal that obtains is:
E{sin(B(t))×J
0(A)×cos(ω
LOt)-cos(B(t))×J
1(A)×cos[(ω
LO±ω
l)t]}，
Wherein: B (t) represents the unipolarity signal of telecommunication, and A represents the radiofrequency signal amplitude, and E represents electric field strength, and LO is an optical carrier frequency, and l is a radio frequency signal frequency, and ω represents frequency, and t is the time.As can be seen, output signal comprises a center band and two sideband signals, adds electrical signal amplitude by regulating, and can make center band and both sides sideband carry the information of complimentary amplitude, pass through one of them in the sideband of the optical filter filtering left and right sides again, realize the frequency shift keying light modulation.
Compared with prior art, the invention has the beneficial effects as follows: adopt the external modulation technology, can not form and warble; The modulation of light carrier only needs a single driving Mach zehnder modulators, thereby simplifies the structure, and has reduced the cost of device; By any one sideband signals in the optical filter filtering light modulating signal, and need not the strict phase relation of controlling between each radiofrequency signal, greatly reduce the difficulty of modulation, make frequency shift keying (FSK) optical modulation signal be easy to control.
Description of drawings
Fig. 1 is the composition connection diagram of embodiment.
Fig. 2 is the signal schematic representation of embodiment;
Wherein: figure (a) is single output spectrum figure that drives the Mach zehnder modulators; Figure (b1) is the center band spectrum among the figure (a); Figure (b2) is the signal waveforms after the center band signal among the figure (a) detects through receiver; Figure (b3) is the eye pattern of figure (b2); Figure (c1) is left side band spectrum figure among the figure (a); Figure (c2) is the signal waveforms after left side band signal detects through receiver among the figure (a); Figure (c3) is the eye pattern of figure (c2); Figure (d1) is through the filtered spectrogram of Fiber Bragg Grating FBG; Figure (d2) is the eye pattern of figure (d1); Figure (e1) is a FSK light modulating signal oscillogram of utilizing the VPIsystem emulation tool to obtain, and figure (e2) is the eye pattern of figure (e1).
Fig. 3 is the application schematic diagram of embodiment signal;
Wherein: figure (a) is the center band signal eye pattern that FSK light modulation information obtains back-to-back; Figure (b) is the center band signal eye pattern that FSK light modulation information obtains after the transmission of 12.5km standard single-mode fiber; Figure (c) is the center band signal error rate schematic diagram that records; Figure (d) is the signal of telecommunication eye pattern of the back-to-back signal of fsk signal after by remodulates; Figure (e) be fsk signal by remodulates after the signal of telecommunication eye pattern that obtains after the 12.5km standard single-mode fiber transmission; Figure (f) is the error rate schematic diagram before and after the transmission that obtains after by remodulates of fsk signal.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1, present embodiment comprises: tunable laser, Polarization Controller, DC power supply, single Mach zehnder modulators that drives, radio-frequency signal generator, data source, electrical adder, optical filter and oscilloscope, wherein: the output port of tunable laser links to each other with Polarization Controller and transmits optical carrier, Polarization Controller links to each other with single light input end mouth that drives the Mach zehnder modulators and transmits the polarised light carrier signal, DC power supply links to each other with single offset port that drives the Mach zehnder modulators and transmits DC power supply, the output port of the radio-frequency signal generator carry high frequency electrical signals that links to each other with an input port of electrical adder, the data source adjustable signal of telecommunication of transmission amplitude that links to each other with another input port of electrical adder, the output port of electrical adder links to each other with single rf inputs mouth that drives the Mach zehnder modulators and transmits the signal of telecommunication after the addition, the optical output port of list driving Mach zehnder modulators links to each other with the light input end mouth of optical filter and transmits the light signal that contains center band and two sidebands that produces, and oscilloscope links to each other with optical filter and transmits the FSK light modulating signal.
Described optical filter produces the adjustable unipolar signal of telecommunication of amplitude, comprise: optical circulator and Fiber Bragg Grating FBG, wherein: first port of optical circulator links to each other with single driving Mach zehnder modulators and transmits the light signal that contains center band and two sidebands, second port of optical circulator links to each other with Fiber Bragg Grating FBG and transmits the light signal that contains center band and two sidebands, and Fiber Bragg Grating FBG links to each other with oscilloscope and transmits the FSK light modulating signal.
Described Fiber Bragg Grating FBG adopts purple coral-FBG-A15497, and three dB bandwidth is 0.106nm, and reflectivity is 90%, be used for filtering single drive that the Mach zehnder modulators produces about one of them of two sideband signals.
The model of described tunable laser is TSL-210F, and it is used to export continuous laser, and this continuous laser is input to single the driving and produces a center band and two sideband signals after the Mach zehnder modulators is modulated, and band separation is the frequency of add radiofrequency signal.
Described radio-frequency signal generator adopts Agilent E8257D PSG, and it is used for the adjustable high-speed radio-frequency sinusoidal signal of output amplitude.
Described single model that drives the Mach zehnder modulators is JDS-10G-MZM:21023816, it is biased in the minimum point of transmission curve, export three amplitude shift keyings (ASK) signal, M signal and two sideband signals carry the information of complimentary amplitude, regulate one of them sideband signals of optical filter filtering, just obtained the amplitude shift keying light modulating signal.
Described DC power supply provides 7.2V direct voltage.
The model of described data source is TG2P1A, is used for the adjustable unipolar signal of telecommunication of generation amplitude.
The course of work of present embodiment is: it is the continuous light wave of 1553.57nm that tunable laser provides wavelength, enter into single Mach zehnder modulators that drives by Polarization Controller, data source produces the pseudo random sequence of 1.25-Gb/s, length is 27-1, the radiofrequency signal addition of the 10GHz that produces by electrical adder and radio-frequency signal generator is connected to single rf inputs mouth that drives the Mach zehnder modulators then and carries out the signal modulation.7.2V direct voltage be loaded into single offset port that drives the Mach zehnder modulators, single three band signals that drive the output of Mach zehnder modulators enter into Fiber Bragg Grating FBG by optical circulator, regulate the centre wavelength of Fiber Bragg Grating FBG by temperature control, one of them sideband signals of filtering, entering into oscilloscope observes, obtain the FSK light modulating signal, by regulating Fiber Bragg Grating FBG centre wavelength, make that reflected signal leaches the center band respectively by optical circulator and left side band signal is observed again.
The signal that present embodiment reflects Fiber Bragg Grating FBG is input in the receiver by optical circulator and detects, and it is complementary obtaining its center band and left side band signal, and what promptly produce is the FSK light modulating signal.
The signal schematic representation of present embodiment specifically as shown in Figure 2, wherein: Fig. 2 (a) is single output spectrum figure that drives the Mach zehnder modulators, and a center band and two sideband signals are arranged among this figure, and the center band be higher than about two sidebands; Fig. 2 (b1) is the center band spectrum among Fig. 2 (a), and this spectrum is more than the 12dB to the rejection ratio of other spectrum component; Fig. 2 (b2) is the signal waveforms after the center band signal among Fig. 2 (a) detects through receiver; Fig. 2 (b3) is the eye pattern of Fig. 2 (b2); Fig. 2 (c1) is a left side band spectrum among Fig. 2 (a), and this spectrum is more than the 16dB to the rejection ratio of other spectrum component; Fig. 2 (c2) is the signal waveforms after left side band signal detects through receiver among Fig. 2 (a); Fig. 2 (c3) is the eye pattern of Fig. 2 (c2).Comparison diagram 2 (b2) and Fig. 2 (c2) as can be seen, center band and the entrained information of left side band signal are anti-phase, so center band and left side band signal have just constituted the FSK light modulating signal.For obtaining FSK information, single three band signals that drive the output of Mach zehnder modulators can leach center band and left side band (or center band and the right band) simultaneously by Fiber Bragg Grating FBG, Fiber Bragg Grating FBG transmission spectrum centre frequency is between left side band and center band, and near left side band, be mainly used in filtering the right band signal, force down the center band signal simultaneously.Fig. 2 (d1) is through the filtered spectrogram of Fiber Bragg Grating FBG, and the center band is the same with left side band signal high among this figure, and is higher than the right band greater than 15dB, and center band and left side band signal have constituted a FSK light modulating signal; Fig. 2 (d2) is the eye pattern of Fig. 2 (d1), this signal amplitude is thicker as can be seen, this is because the modulation extinction ratio of the single driving Mach zehnder modulators that uses in the experiment is caused inadequately, when the single Mach zehnder modulators that drives that adopts extinction ratio near 30dB can address this problem.Fig. 2 (e1) is a FSK light modulating signal oscillogram of utilizing the VPIsystem emulation tool to obtain, Fig. 2 (e2) is the eye pattern of Fig. 2 (e1), wherein used single modulation extinction ratio that drives the Mach zehnder modulators is 30dB, this signal amplitude is smooth, just when bit change, can produce overshoot, but this can't exert an influence to remodulates.
The center band signal eye pattern that the FSK light modulation information that present embodiment is produced obtains back-to-back is shown in Fig. 3 (a); The center band signal eye pattern that the FSK light modulation information that present embodiment is produced obtains after the transmission of 12.5km standard single-mode fiber is shown in Fig. 3 (b); Fig. 3 (c) is the center band signal error rate schematic diagram that records, by the power damage that only has after the visible transmission of Fig. 3 (c) about 0.5dBm; Fig. 3 (d) is the signal of telecommunication eye pattern of the back-to-back signal of fsk signal after by remodulates; Fig. 3 (e) be fsk signal by remodulates after the signal of telecommunication eye pattern that obtains after the 12.5km standard single-mode fiber transmission; Fig. 3 (f) is the error rate schematic diagram before and after the transmission that obtains after by remodulates of fsk signal, by the power damage that 0.4dBm is only arranged after the visible transmission of Fig. 3 (f).Therefore, Fig. 3 has proved the validity of the FSK light modulating signal that present embodiment produces, and it can be used in Access Network.
Claims (3)
1. single driving of a frequency shift keying (FSK) optical modulation signal modulated implement device, comprise: tunable laser, single Mach zehnder modulators that drives, radio-frequency signal generator and data source, it is characterized in that, also comprise: electrical adder and optical filter, wherein: tunable laser links to each other with a single driving Mach zehnder modulators input and transmits optical carrier, an input of radio-frequency signal generator and the electrical adder carry high frequency electrical signals that links to each other, another input of data source and electrical adder adjustable unipolarity signal of telecommunication of transmission amplitude that links to each other, the output of electrical adder and single link to each other signal of telecommunication after the transmission addition of Mach zehnder modulators radio frequency interface that drives, single output that drives the Mach zehnder modulators links to each other with optical filter and transmits the light signal that contains center band and two sidebands of generation;
Described optical filter filtering produce about in two sideband signals one of them, comprise: optical circulator and Fiber Bragg Grating FBG, wherein: first port of optical circulator links to each other with single driving Mach zehnder modulators and transmits the light signal that contains center band and two sidebands, and second port of optical circulator links to each other with Fiber Bragg Grating FBG and transmit the light signal that contains center band and two sidebands.
2. single modulation implement device that drives of frequency shift keying (FSK) optical modulation signal according to claim 1 is characterized in that, described single offset port that drives the Mach zehnder modulators is provided with DC power supply.
3. single modulation implement device that drives of frequency shift keying (FSK) optical modulation signal according to claim 1 is characterized in that, described tunable laser and described single the driving between the Mach zehnder modulators are provided with Polarization Controller.
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| CN102036135A (en) * | 2011-01-25 | 2011-04-27 | 上海交通大学 | Orthogonal frequency division multiple access (OFDMA) passive optical network transmission system |
| CN103281130A (en) * | 2013-05-31 | 2013-09-04 | 上海交通大学 | Multiple frequency millimeter wave generating device based on single-drive Mach-Zehnder modulator |
| WO2015139593A1 (en) * | 2014-03-19 | 2015-09-24 | Huawei Technologies Co., Ltd. | Transmitter apparatus and method |
| CN105049120A (en) * | 2015-05-26 | 2015-11-11 | 陕西思普瑞通信设计咨询有限公司 | Communication transmission method and system |
| CN103812809B (en) * | 2014-03-04 | 2016-10-05 | 上海交通大学 | Produce the method for radio frequency frequency shift keyed signals based on photonic propulsion |
| CN106301590A (en) * | 2016-08-12 | 2017-01-04 | 西南交通大学 | Tunable frequency shift keyed signals generator based on polarization-maintaining fiber grating and method thereof |
| CN107017953A (en) * | 2017-03-16 | 2017-08-04 | 华中科技大学 | A kind of fsk signal generation device, method and its application |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227633A (en) * | 2007-10-26 | 2008-07-23 | 北京邮电大学 | Apparatus and method of optical sign switch based on FSK/ASK quadrature modulation |
| CN101414881A (en) * | 2008-09-26 | 2009-04-22 | 上海大学 | Method for generating down link structure and frequency-tunable millimeter wave of millimeter wave optical fiber transmission system |
-
2010
- 2010-04-29 CN CN 201010160142 patent/CN101834671A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227633A (en) * | 2007-10-26 | 2008-07-23 | 北京邮电大学 | Apparatus and method of optical sign switch based on FSK/ASK quadrature modulation |
| CN101414881A (en) * | 2008-09-26 | 2009-04-22 | 上海大学 | Method for generating down link structure and frequency-tunable millimeter wave of millimeter wave optical fiber transmission system |
Non-Patent Citations (1)
| Title |
|---|
| 《科学通报》 20091031 张旨遥等 一种只需单个判决阈值的全光误码指示新方法 3060-3064 1-3 第54卷, 第20期 2 * |
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| CN102036135A (en) * | 2011-01-25 | 2011-04-27 | 上海交通大学 | Orthogonal frequency division multiple access (OFDMA) passive optical network transmission system |
| CN103281130A (en) * | 2013-05-31 | 2013-09-04 | 上海交通大学 | Multiple frequency millimeter wave generating device based on single-drive Mach-Zehnder modulator |
| CN103281130B (en) * | 2013-05-31 | 2016-05-25 | 上海交通大学 | Based on single multiple frequence millimeter wave generating device that drives Mach zehnder modulators |
| CN103812809B (en) * | 2014-03-04 | 2016-10-05 | 上海交通大学 | Produce the method for radio frequency frequency shift keyed signals based on photonic propulsion |
| WO2015139593A1 (en) * | 2014-03-19 | 2015-09-24 | Huawei Technologies Co., Ltd. | Transmitter apparatus and method |
| US9419719B2 (en) | 2014-03-19 | 2016-08-16 | Huawei Technologies Co., Ltd. | Transmitter apparatus and method |
| CN105049120A (en) * | 2015-05-26 | 2015-11-11 | 陕西思普瑞通信设计咨询有限公司 | Communication transmission method and system |
| CN106301590A (en) * | 2016-08-12 | 2017-01-04 | 西南交通大学 | Tunable frequency shift keyed signals generator based on polarization-maintaining fiber grating and method thereof |
| CN106301590B (en) * | 2016-08-12 | 2018-10-30 | 西南交通大学 | Tunable frequency shift keyed signals generation device based on polarization-maintaining fiber grating and its method |
| CN107017953A (en) * | 2017-03-16 | 2017-08-04 | 华中科技大学 | A kind of fsk signal generation device, method and its application |
| CN107017953B (en) * | 2017-03-16 | 2019-10-25 | 华中科技大学 | A kind of fsk signal generation device, method and its application |
| CN107993429A (en) * | 2017-11-08 | 2018-05-04 | 国家电网公司 | A kind of passive pollution flashover monitoring system |
| CN113949459A (en) * | 2021-08-27 | 2022-01-18 | 西安空间无线电技术研究所 | System and method for generating photoelectric mixed FSK signal based on intensity modulator and MZI cascade connection |
| CN113949459B (en) * | 2021-08-27 | 2022-10-21 | 西安空间无线电技术研究所 | System and method for generating photoelectric mixed FSK (frequency Shift keying) signal based on intensity modulator and MZI (Mach Zehnder interferometer) cascade |
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Application publication date: 20100915 |