WO2015077929A1

WO2015077929A1 - Optical value full adder and optical value full adding method and device

Info

Publication number: WO2015077929A1
Application number: PCT/CN2013/087903
Authority: WO
Inventors: 曹彤彤; 张俪耀; 刘耀达
Original assignee: 华为技术有限公司
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2015-06-04
Also published as: CN105051598B; CN105051598A

Abstract

An optical value full adder and optical value full adding method and device. The optical value full adder comprises: at least two optical full adding units which perform cascading, each of the at least two optical full adding units comprising: an optical input terminal, a signal input terminal used for inputting a signal to be summed, at least one low carry signal input terminal, a signal input terminal used for outputting a summed result, at least one high carry signal input terminal, at least one optical waveguide, and an optical switch based on optical guide logic; in the at least two optical full adding units which perform cascading, at least one high carry signal output terminal of any one of the optical full adding units being connected to at least one low carry signal input terminal of the next-level optical full adding unit. Also disclosed are a corresponding optical value full adding method and device.

Description

Optical numerical full adder, optical numerical full adding method and device

The present invention relates to the field of optical computing technologies, and in particular, to an optical value full adder, an optical value full adding method and device. Background technique

The ever-increasing data traffic in the future will place higher demands on the data processing capabilities of computer systems. The performance of computer systems will directly affect the development and progress of the information industry and all walks of life. Existing electronic-based computer systems rely on the continued development of integrated circuit technology, and the computing power of the processor continues to increase. However, as the integration of the chip increases, the power consumption in the chip rises sharply, and the heat dissipation problem caused by this will further improve the performance of the processor.

Compared with electronic components, photonic-based devices tend to have high bandwidth, low power consumption, and high parallelism. Therefore, research on photonic-based computer systems and their basic meta-function devices has begun to break existing computer systems. The bottleneck of development. Adders play an extremely important role in electrical computing. In addition to adding input data, they are the basis for implementing multipliers, block converters, accumulators, counters, and more. Because of this, optical adders are also an important research component in optical computing systems.

As shown in Fig. 1, the existing optical full adders mostly utilize nonlinear effects of materials, such as structures based on periodic polarization lithium niobate waveguides or structures based on semiconductor optical amplifiers. Binary optical full adders based on these structures are often cascading from multiple basic all-optical switches based on nonlinear effects. The binary optical full adder based on the nonlinear effect should utilize the nonlinear effect of the material, which requires a bundle of 4 strong pump light to be injected into the material during operation to realize the function of opening the light, which greatly increases the light source. Difficulty and cost of fabrication, while high-intensity light injection also imposes higher requirements on the heat dissipation of the system; and requires materials with strong optical nonlinear effects, such as periodically polarized lithium niobate, etc., and requires special processing. The process can be realized and cannot be directly fabricated on silicon materials with weak nonlinear effects, so the material cost and production cost of the full adder are high. Summary of the invention

Embodiments of the present invention provide an optical numerical full adder, an optical value full adding method and device, which can make a device work without high-intensity pump light injection, a fabrication process and a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) process compatibility, device implementation difficulty and production cost reduction, as well as small delay, fast operation and low power consumption in the full-addition process.

In a first aspect, an optical value full adder is provided, comprising:

Cascading at least two optical total adding units, each of the at least two optical all-adding units comprising: an optical input terminal, a signal input terminal for inputting a signal to be added, and at least one low-position carry a signal input terminal, a signal output terminal for outputting an addition result, at least one high-position carry signal output terminal, at least one optical waveguide, and an optical switch based on an optical guiding logic;

The at least one high-level carry signal output end of any one of the at least two optical full-add units of the optical total add-on unit and the at least one low-position carry signal input end of the optical full-add unit of the next stage Connected.

In a first possible implementation, each of the optical total adding units further includes: an optical beam splitter and a photo combiner.

With reference to the first aspect or the first possible implementation manner of the first aspect, in the second possible implementation, the optical total adding unit specifically includes two signal input ends, wherein one signal input end is used for input The first to-be-phased power-on signal is used to input a second to-be-phased power-on signal.

With reference to the second possible implementation of the first aspect, in a third possible implementation, the first to-be-connected power-on signal and the second to-be-charged power-on signal are multi-bit binary numbers;

Each of the optical total adding units is configured to perform phase separation on each of the first to-be-phased power-on signal and the second to-be-phased power-on signal and the low-position carry signal in order of number of bits from low to high. Add the sum result and the high carry signal.

In conjunction with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect, in a fourth possible implementation The optical value full adder further includes: at least one photoelectric converter;

Each of the optical total adding units includes one of the lower carry signal input terminals for inputting a lower carry electric signal, and one of the high carry signals output terminals for outputting a high carry optical signal; the at least two of the cascaded In the optical total adding unit, the high-order carry signal output end of any one of the optical full-adding units is connected to one end of a photoelectric converter, and the other end of the photoelectric converter and the lower end of the next-stage optical full-adding unit The carry signal input terminal is connected, and the photoelectric converter is configured to convert the output of the high carry signal output terminal into an electrical signal output to the lower carry signal input end of the next-stage optical full add unit. In combination with the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect, in a fifth possible implementation Each of the optical total adding units includes two low-order carry inputs for inputting the first lower carry light signal and the second lower carry light signal, respectively for outputting the first high carry light signal and the second high position Two high carry outputs of the carry optical signal, the combination of the first low carry optical signal and the second low carry optical signal represent a low carry, the first high carry light signal and the second high carry light signal Combination means high carry;

And outputting, by the optical total adding unit, the high-order carry output end of the first high-order carry light signal and the input first low-position carry light signal of the next stage of the at least two optical all-adding units The lower carry input is connected, and the high carry output of the second higher carry optical signal is connected to the lower carry input of the input second lower carry optical signal of the next stage.

Combining the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect The implementation manner or the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner, the optical switch is a micro ring resonator switch or a Mach-Zehnder interferometer MZI switch.

Combining the first aspect or the first possible implementation of the first aspect or the second possible implementation of the first aspect or the third possible implementation of the first aspect or the fourth possible implementation of the first aspect The fifth possible implementation manner of the first aspect or the sixth possible implementation manner of the first aspect, in a seventh possible implementation, the at least one optical waveguide, the optical beam splitter, and the photosynthetic The optical structure in the beam splitter and optical switch is any one of silicon, a silicon SOI or a III-V compound on an insulating substrate. In a second aspect, an optical value addition method is provided, including:

Acquiring the input to-be-added signal and the lower carry signal;

Controlling, according to the to-be-added signal and the lower carry signal, a state of the switch based on the light guiding logic to control a direction of the input light in the at least one optical waveguide;

Obtaining the addition result and the high carry signal according to the condition of the output light;

The upper carry signal is output as a lower carry signal of the next addition calculation of the signal to be added.

In a first possible implementation manner, the lower carry signal is an electrical signal, and the high carry The signal is an optical signal;

And outputting the high-order carry signal as a lower carry signal of the next addition calculation of the to-be-added signal, including:

Converting the high carry signal into an electrical signal;

The high carry signal converted into an electric signal is output as a lower carry signal of the next addition calculation of the signal to be added.

With reference to the second aspect, in a second possible implementation manner, the lower carry signal includes a first lower carry optical signal and a second lower carry optical signal, and the high carry signal includes a first high carry light signal and a second High carry light signal;

And outputting the first high-order carry signal as a first lower-level carry optical signal of the next addition calculation of the to-be-added signal;

And outputting the second upper carry signal as a second lower carry optical signal of the next addition calculation of the to-be-added signal;

The combination of the first lower carry optical signal and the second lower carry optical signal represents a lower carry, and the combination of the first higher carry optical signal and the second higher carry optical signal represents a higher carry. In a third aspect, an optical value full adding device is provided, including:

a first acquiring unit, configured to acquire the input to-be-added signal and a low-level carry signal; and a control unit, configured to control a state of the switch based on the light guiding logic according to the to-be-added signal and the low-level carry signal, to control the input The direction of light in at least one of the optical waveguides;

a second obtaining unit, configured to obtain an addition result and a high-order carry signal according to a condition of the output light; and a first output unit configured to use the high-order carry signal as a low-position carry of the next addition calculation of the to-be-added signal The signal is output.

In a first possible implementation manner, the lower carry signal is an electrical signal, and the high carry signal is an optical signal;

The first output unit includes:

a conversion unit, configured to convert the high carry signal into an electrical signal;

a second output unit, configured to use the high-order carry signal converted into an electrical signal as the to-be-added The lower carry signal of the next addition of the signal is output.

With reference to the third aspect, in a second possible implementation manner, the lower carry signal includes a first lower carry optical signal and a second lower carry optical signal, and the high carry signal includes a first high carry light signal and a second High carry light signal;

The first output unit includes:

a third output unit, configured to output the first high-order carry signal as a first lower-level carry optical signal of the next addition calculation of the to-be-added signal;

a fourth output unit, configured to output the second upper carry signal as a second lower carry optical signal of the next addition calculation of the to-be-added signal;

The combination of the first lower carry optical signal and the second lower carry optical signal represents a lower carry, and the combination of the first higher carry optical signal and the second higher carry optical signal represents a higher carry. By adopting the optical numerical full adder, the optical numerical full adding method and the device technical solution of the invention, the device can be operated without high-intensity pump light injection, the manufacturing process is compatible with the CMOS process, and the realization difficulty and fabrication of the device are realized. The cost is reduced, and the delay of the full-addition process is small, the operation speed is fast, and the power consumption is low. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only the present invention. In some embodiments, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic structural view of an optical full adder in the prior art;

2 is a schematic structural view of an embodiment of an optical full adder of the present invention;

3 is a schematic structural view of a full-addition unit in the binary optical full adder shown in FIG. 2; FIG. 4 is a schematic structural view of a micro-ring resonator switch according to the present invention;

Figure 5 is a schematic view showing the optical path structure of the fully-added unit shown in Figure 3;

6 is a schematic structural view of another embodiment of an optical full adder according to the present invention; FIG. 7 is a schematic structural view of a full adder unit in the optical full adder shown in FIG.

Figure 8 is a view showing the optical path of the optical total adding unit shown in Figure 7; 9 is a flow chart of an embodiment of an optical value total adding method according to the present invention; FIG. 10 is a flow chart of another embodiment of an optical value total adding method according to the present invention; FIG. 12 is a schematic structural view of an embodiment of an optical value full adding device according to the present invention; FIG. 13 is another embodiment of an optical numerical full adding device according to the present invention; FIG. 14 is a schematic structural view of still another embodiment of an optical value full adding device according to the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The optical value full adder of the present invention comprises: a plurality of optical full add units for cascading, each optical full add unit comprising: an optical input end, a signal input end for inputting a signal to be added, and at least one low carry signal input a signal output terminal for outputting an addition result, at least one high-position carry signal output terminal, a plurality of optical waveguides, and an optical switch based on optical guiding logic; and at least two optical total adding units for cascading, any one of optical The high carry signal output of the full add unit is connected to the lower carry signal input of the optical full add unit of the next stage. Each of the optical total adding units may further include: an optical beam splitter and an optical combiner. Each of the optical full adding units specifically includes two signal input terminals, one of which is used for inputting a first to-be-phased power-on signal, and the other of which is for inputting a second to-be-phased power-on signal.

The optical value full adder of the present invention will be described in detail below in two specific embodiments.

2 is a schematic view showing the structure of an embodiment of an optical full adder of the present invention. Figure 2 shows a cascade structure of n full-addition units, which can perform addition of n-bit binary numbers (set AJN and BJN to represent n-bit binary numbers, respectively), Α^Α,, .. .ΑΑ-i.. .A ! , Β _ΙΝ =Β _η ...Β,Β^. , .Β! ) , where Α _Η _{η η} represents the highest bit and A Bi represents the lowest bit. The output high-level carry light signal of the first-stage full-addition unit is connected to the input low-level carry electric signal of the subsequent one-stage full-addition unit after photoelectric conversion. 8 ₀₁ ^=0^ ₁₁ ...8 ₁ 8 ₁ _ ₁ ... 8 ₁ is the output of the structure, and C _n is the carry term of the highest bit.

The core of the multi-bit binary number full-add operation is a full-addition unit. The full-addition unit of the present invention is based on optical steering logic. For a full adder, the input includes two signals to be calculated and a low-position carry signal, and the output includes operations. The resulting signal and the high carry signal. Figure 3 is a binary optical full adder shown in Figure 2. In the structure diagram of the full-addition unit, the full-addition unit can realize the full-addition operation of the 1-bit binary number, and the truth table is as shown in Table 1.

Table 1 The truth table of the optical full-add unit shown in Figure 3

The logic values of the input and output are represented by the level of the electrical signal or the intensity of the optical signal, where each signal has the following meaning:

, Β _1: represents two electrical signals to be calculated, the high and low levels of the signal in this embodiment respectively represent logic 1 and 0;

Q_ _{i :} indicates the low carry signal of this unit;

S _1: indicates the calculation result of the unit. In this embodiment, light (or strong light) indicates 1 and no light (or weak light) indicates 0;

Q: indicates the output high carry light signal of this unit;

Input light: Input light source for this unit.

The input light source of the present invention does not need to be high intensity pump light, and may be an ordinary light source.

The operation principle of the full-addition unit shown in Fig. 3 is as follows: the electrical signal to be calculated and the low-position carry signal are connected to the light-guided logic switch in the optical path through a modulation structure, such as a Mach-Zehnder Interferometer (MZI). Switch, and the micro-ring resonator switch shown in Figure 4, the different inputs of the electrical signal can control the state of the switch to control the direction of the light wave in the optical path, and finally according to the presence or absence of light in the output (or strong light intensity) Weak) can be judged to obtain the operation result signal and the high-order carry signal, thereby realizing the full addition of the 1-bit binary number. Each of the electrical signals can be connected to a modulation structure of a plurality of optical switches, and a plurality of optical switches connected to the same electrical signal operate in synchronization.

FIG. 5 is a schematic diagram of the optical path structure of the fully-added unit shown in FIG. 3, including a plurality of optical waveguides, an optical beam splitter, an optical combiner, an optical switch, and a modulation structure thereof. Modulation structure of microring 1 and signal to be calculated Connected, the modulation structure of the microring 2 and the microring 3 is connected to the signal to be calculated, and the modulation structure of the microring 4 and the microring 5 is connected to the lower carry signal C _l4 . The structure of the microring resonator optical switch is as shown in FIG. 4, and includes a microring resonator and an adjacent waveguide. The microring resonator is coupled with the adjacent waveguide, and the light is input from the input end waveguide and the microring resonator is connected. Interactions occur to change the direction of the light wave. When the microring resonator is in resonance, light will couple into the microring and output from the download; when the microring resonator is in a non-resonant state, light will be output directly from the through end without passing through the microring. For a certain wavelength of light, the resonant state of the microring is directly related to the effective refractive index of the microring. Therefore, the resonant state of the microring can be changed by changing the effective refractive index of the waveguide. For silicon materials, the methods used include thermo-optic effects, carrier dispersion effects, and the like. The thermo-optic effect adjustment is to change the effective refractive index of the waveguide by heating or cooling the micro-ring waveguide, and the method of heating the electrode above the waveguide can be adopted; the carrier dispersion effect is another common change of the effective refractive index of the silicon waveguide. In the current method, high-speed silicon-based electro-optical modulation is often used in such a manner that the applied carrier voltage is used to change the carrier concentration in the silicon waveguide to change the refractive index of the silicon material. In addition to silicon, the function of the micro-ring optical switch can also be realized by the electro-optic effect of the three-five materials.

It should be noted that the optical path structure diagram of the fully-added unit shown in FIG. 5 is only an example. According to the principle of the present invention, the other optical path structures used to implement the full-addition unit and the multi-bit numerical calculation full adder are Within the scope of protection of the present invention.

The working process of the full-addition unit is described by the sixth behavior example in the truth table shown in Table 1, Α^Ι, Β^Ο, C _l4 = l , assuming that the micro-ring resonator resonates when the input electrical signal is 0, When the signal is 1, it does not resonate, then the microring connected to the signal is in a resonant state, and the other microrings are in a non-resonant state. The transmission path of light in the structure is shown by the arrow pointing in FIG. Light enters from the input end. When passing through the microring 1, since the microring is in a non-resonant state, light passes directly from the through end, passes through the beam splitter and is split into two beams. When passing through the microrings 2 and 3, the microring is in resonance. , Light is output from the download side. The microrings 4 and 5 are in a non-resonant state. When the light passes, the light passes directly from the through end. The final output terminal & no light (or weak light) indicates that the operation result of the bit is 0, and the high carry end G has light (or light). Strong) indicates that the post-level carry signal is 1. Therefore, the results shown in the truth table shown in Table 1 are obtained, and the function of adding 1-bit binary numbers is realized. A multi-bit binary number addition can be implemented by multiple 1-bit binary full-addition unit cascades.

The optical structure in the plurality of optical waveguides, optical beam splitters, optical combiners, and optical switches in the present invention is any one of silicon, a silicon SOI or a III-V compound on an insulating substrate. According to an embodiment of the present invention, an optical numerical full adder does not require high-intensity pump light injection during operation, and the fabrication process is compatible with a CMOS process, and the implementation difficulty and manufacturing cost of the device are reduced.

Figure 6 is a schematic view showing the structure of another embodiment of an optical full adder of the present invention. Different from the foregoing embodiments, in the full-addition unit of the embodiment, the carry signals are represented by optical signals, and the cascade between the full add units does not require photoelectric conversion, which further improves the performance of the device.

Figure 6 is for n-bit binary numbers (

- . -B! ) The cascading structure of the addition operation is formed by cascading the carry ends of n all-added units. In this embodiment, the carry signal is represented by two optical signals C and C*, and the advantage is that the input low carry signal and the output high carry signal are both optical signals, and in the process of cascading, the previous stage and the latter one The level carry signals can be directly cascaded, avoiding the photoelectric conversion link in the foregoing embodiment, and reducing the complexity of the system. Among them, the logical values of the two signals C and C* are always opposite.

Fig. 7 is a schematic structural view of a full addition unit in the optical full adder shown in Fig. 6. Compared with the full-add unit in the foregoing embodiment, the input and output of the full-add unit are different, and the specific meanings are as follows:

A ₁₅ B _1: Two electrical signals to be calculated, the high and low levels of the signal in this embodiment respectively represent 1 and 0; S _1: the calculation result of the unit, in this example, there is light (or strong light) indicating 1 No light (or weak light) means 0;

Q_!, C* _l4 : Carry light signal of the previous stage, C _l4 =l and C* _l4 =0 means there is carry, Q_!=0 and C*il=l means no carry;

Q, C*, : The carry light signal output by this unit, d=l and c o means there is carry, d=0 and C]=l means no carry;

Input light: Input light source for this unit.

The truth table for implementing the 1-bit binary number full addition operation is shown in Table 2:

Table 2 The truth table of the optical full-add unit shown in Figure 7.

Fig. 8 is a view showing the optical path structure of the optical total adding unit shown in Fig. 7, which also includes a plurality of optical waveguides, a beam splitter, an optical combiner, an optical switch, a modulation structure thereof, and the like. The modulation structure of the microring resonators 1, 2, 3, 4 is connected to the electrical signal to be calculated, and the modulation structure of the microring resonators 5, 6, 7, 8 is connected to the electrical signal to be calculated. The working process is described in the sixth behavior example in the truth table shown in the table. The transmission path of the light in the structure is as indicated by the arrow in FIG. The two electrical signals A _F 1 , B 0 to be calculated assume that the microring resonator resonates when the input electrical signal is 0, and when the electrical signal is 1, does not resonate, then the microring resonator connected to A is in a non-resonant state. The microring resonator connected to B is in a resonant state. The low carry signal is 1, and the end has a strong light input. (The * ₁₄ has no glare input. When the light passes through the microring resonator connected to ^, it passes directly from the through end, and the light resonates through the connected microring. When outputting from the download terminal, the final output has no light (or weak light), indicating that the operation result of the unit is 0, and the high-level carry terminal Q has light (or light intensity), and no light (or weak light) , indicating that the high-order carry signal of the unit is 1. Therefore, the calculation results shown in the truth table shown in Table 2 are obtained. A plurality of 1-bit binary full-addition unit cascades can realize addition of multi-bit binary numbers.

It should be noted that the optical path structure diagram of the fully-added unit shown in FIG. 8 is only an example. According to the principle of the present invention, the other optical path structures used to implement the full-addition unit and the multi-digit numerical calculation full adder are Within the scope of protection of the present invention.

An optical numerical full adder according to an embodiment of the invention does not require high-intensity pump light injection during operation, and the manufacturing process is compatible with the CMOS process, and the implementation difficulty and the manufacturing cost of the device are reduced; The combination does not require photoelectric conversion, which reduces the delay and power consumption in the operation, further improving the performance of the device.

9 is a flow chart of an embodiment of an optical value total addition method of the present invention. As shown in Figure 9, the method includes the following steps:

Step S101: Acquire an input to-be-added signal and a low-position carry signal.

Step S102, controlling a state of the switch based on the light guiding logic according to the to-be-added signal and the low-level carry signal to control the direction of the input light in the at least one optical waveguide.

Step S103, obtaining an addition result and a high carry signal according to the condition of the output light.

Step S104, outputting the high-order carry signal as a lower carry signal of the next addition calculation of the to-be-added signal.

The acquired input signal to be added generally includes two signals to be added, and the two signals to be added may be multi-bit binary numbers. In this embodiment, the number of bits can be from low to high. Waiting for phase Each bit of the power-on signal and the low-level carry signal are separately added to obtain an addition result and a high-order carry signal.

In the process of adding each bit, an optical path structure diagram as shown in FIG. 5 or as shown in FIG. 8 may be adopted, and an optical switch based on the light guiding logic is connected to each optical path, and the electric signal to be added and the low carry signal pass through the optical switch. The modulation structure is connected with the light guiding logic switch in the optical path. The different inputs of the electrical signal can control the state of the switch to control the direction of the input light in the optical path, and finally according to the presence or absence of the output light or the intensity of the light intensity. The addition result and the high carry signal are output, and the high carry signal is output as the lower carry signal of the next addition calculation of the signal to be added. The specific implementation process can refer to the foregoing embodiment.

An optical value total addition method according to an embodiment of the present invention, the calculation process is based on the steering logic of light, and the full addition operation is realized by controlling the direction of the light, which has small delay, fast calculation speed, and low power consumption.

Figure 10 is a flow chart showing another embodiment of an optical value full addition method of the present invention. As shown in Figure 10, the method includes the following steps:

Step S201: Acquire an input to-be-added signal and a low-position carry signal, and the low-position carry signal is an electrical signal.

Step S202, controlling the state of the switch based on the light guiding logic according to the to-be-added signal and the low-level carry signal to control the direction of the input light in the at least one optical waveguide.

Step S203: Acquire an addition result and a high carry signal according to the condition of the output light, and the high carry signal is an optical signal.

Step S204: Convert the high carry signal into an electrical signal.

Step S205, outputting the high-order carry signal converted into an electrical signal as a lower carry signal of the next addition calculation of the to-be-added signal.

Step S201 to step S203 of this embodiment are the same as steps S101 to S103 of the foregoing embodiment. In this embodiment, the lower carry signal is an electrical signal, and the high carry signal is an optical signal, and steps S204 and S205 are for the foregoing embodiment. Further refinement of step S104, since the output high carry signal is an optical signal, since the high carry signal is required as the lower carry signal of the next addition calculation of the signal to be added, the high carry signal is used as the phase to be phased Before the output of the lower carry signal of the next addition of the signal is output, it is necessary to convert the high carry signal into an electrical signal. The specific implementation process can refer to the description in the foregoing embodiment.

An optical value total addition method according to an embodiment of the present invention, the calculation process is based on light steering logic The full-add operation is realized by controlling the direction of the light, which has a small delay, a fast calculation speed, and low power consumption. Figure 11 is a flow chart showing still another embodiment of an optical value addition method of the present invention. As shown in Figure 11, the method includes the following steps:

Step S301: Acquire an input to-be-added signal and a lower carry signal, where the lower carry signal includes a first lower carry light signal and a second lower carry light signal.

Step S302, controlling the state of the switch based on the light guiding logic according to the to-be-added signal and the low-level carry signal to control the direction of the input light in the at least one optical waveguide.

Step S303: Acquire an addition result and a high carry signal according to the condition of the output light, where the high carry signal includes a first high carry light signal and a second high carry light signal.

Step S304, the first high-order carry signal is output as the first lower-level carry optical signal of the next addition calculation of the to-be-added signal.

Step S305, outputting the second upper carry signal as a second lower carry optical signal of the next addition calculation of the to-be-added signal, wherein the first low carry light signal and the second low carry light The combination of signals represents a low carry, and the combination of the first high carry light signal and the second high carry light signal represents a high carry.

Different from the foregoing embodiment, in the present embodiment, both the low carry signal and the high carry signal use a combination of two optical signals to indicate a low carry and a high carry, so the high carry signal is used as the next addition calculation of the signal to be added. When the low carry signal is used, no photoelectric conversion is required, which reduces the delay and power consumption in the operation, further improving the performance of the device.

An optical value total addition method according to an embodiment of the present invention, the calculation process is based on the guiding logic of light, and the full-add operation is realized by controlling the direction of the light, the delay is small, the calculation speed is fast, and the power consumption is low; and the high-position carry signal is used as When the lower carry signal of the next addition calculation is to be added, the photoelectric conversion is not required, and the delay and power consumption in the operation are further reduced.

Figure 12 is a schematic view showing the structure of an embodiment of an optical value adding device according to the present invention. As shown in Figure 12, the apparatus 1000 includes:

The first obtaining unit 11 is configured to acquire the input to-be-added signal and the low-level carry signal.

The control unit 12 is configured to control a state of the switch based on the light guiding logic according to the to-be-added signal and the low carry signal to control the direction of the input light in the at least one optical waveguide.

The second obtaining unit 13 is configured to obtain an addition result and a high carry signal according to the condition of the output light. a first output unit 14 configured to use the high-order carry signal as a next step of the signal to be added The sub-addition calculation of the lower carry signal is output.

An optical value full adding device according to an embodiment of the present invention, the calculation process is based on the steering logic of light, and the full-add operation is realized by controlling the direction of the light, which has small delay, fast calculation speed, and low power consumption.

Figure 13 is a schematic view showing the structure of another embodiment of an optical value adding device according to the present invention. As shown in Figure 13, the apparatus 2000 includes:

The first obtaining unit 21 is configured to acquire the input to-be-added signal and the low-level carry signal, and the low-position carry signal is an electrical signal.

The control unit 22 is configured to control a state of the switch based on the light guiding logic according to the to-be-added signal and the low carry signal to control the direction of the input light in the at least one optical waveguide.

The second obtaining unit 23 is configured to obtain an addition result and a high carry signal according to the condition of the output light, where the high carry signal is an optical signal.

The first output unit 24 is configured to output the high-order carry signal as a lower carry signal of the next addition calculation of the to-be-added signal.

In the present embodiment, the first output unit 24 includes a conversion unit 241 and a second output unit 242. The converting unit 241 is configured to convert the high carry signal into an electrical signal.

The second output unit 242 is configured to output the high-order carry signal converted into an electrical signal as a lower carry signal of the next addition calculation of the to-be-added signal.

Figure 14 is a schematic view showing the structure of still another embodiment of an optical value adding device according to the present invention. As shown in Figure 14, the apparatus 3000 includes:

The first obtaining unit 31 is configured to acquire the input to-be-added signal and the lower carry signal, where the lower carry signal includes a first lower carry light signal and a second lower carry light signal.

The control unit 32 is configured to control a state of the switch based on the light guiding logic according to the to-be-added signal and the low carry signal to control the direction of the input light in the at least one optical waveguide.

The second obtaining unit 33 is configured to obtain an addition result and a high-order carry signal according to the condition of the output light, where the high-order carry signal includes a first high-order carry light signal and a second high-order carry light signal.

The first output unit 34 is configured to output the high-order carry signal as a lower carry signal of the next addition calculation of the signal to be added.

In this embodiment, the first output unit 34 includes: a third output unit 341 and a fourth output list Yuan 342.

The third output unit 341 is configured to output the first upper carry signal as the first lower carry optical signal of the next addition calculation of the to-be-added signal.

a fourth output unit 342, configured to output the second upper carry signal as a second lower carry optical signal of the next addition calculation of the to-be-added signal; wherein the first lower carry optical signal and The combination of the second lower carry optical signal represents a low carry, and the combination of the first high carry light signal and the second higher carry light signal represents a high carry.

An optical value full adding device according to an embodiment of the present invention, based on the guiding logic of light, realizes a full addition operation by controlling the direction of the light, the delay is small, the calculation speed is fast, and the power consumption is low; and the high carry signal is used as the phase to be phased When the lower carry signal of the next addition of the signal is added, no photoelectric conversion is required, which further reduces the delay and power consumption in the operation.

It should be noted that, for each of the foregoing method embodiments, for the description of the cartridge, it is expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because certain steps may be performed in other orders or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details are not described in the specific embodiments. For details, refer to related descriptions of other embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware implementation, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or none such as infrared, radio, and microwave Wire technology is transmitted from a website, server or other remote source, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless and microwave are included in the fixing of the associated medium. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

1. An optical numerical full adder, characterized in that it includes:

At least two optical full-adding units are cascaded. Each optical full-adding unit in the at least two optical full-adding units includes: an optical input terminal, a signal input terminal for inputting a signal to be added, and at least one low-bit carry. A signal input terminal, a signal output terminal for outputting the addition result, at least one high-bit carry signal output terminal, at least one optical waveguide and an optical switch based on optical guidance logic;

Among the at least two optical full-adding units in cascade, the at least one high-bit carry signal output terminal of any optical full-adding unit and the at least one low-bit carry signal input terminal of the optical full-adding unit of the next stage connected.

2. The optical numerical full adder according to claim 1, characterized in that each of the optical full adder units further includes: an optical beam splitter and an optical beam combiner.

3. The optical numerical full adder according to claim 1 or 2, characterized in that each of the optical full adding units specifically includes two signal input terminals, one of which is used to input the first power to be added. signal, and the other signal input terminal is used to input the second electrical signal to be added.

4. The optical numerical full adder according to claim 3, wherein the first electrical signal to be added and the second electrical signal to be added are multi-digit binary numbers;

Each of the optical full adding units is used to add each bit of the first electrical signal to be added, the second electrical signal to be added and the low-bit carry signal in order from low to high bits. Added to obtain the addition result and the high-order carry signal.

5. The optical numerical full adder according to any one of claims 1 to 4, further comprising: at least one photoelectric converter;

Each of the optical full-adding units includes a low-carry signal input terminal for inputting a low-carry electrical signal, and a high-carry signal output terminal for outputting a high-carry optical signal; the at least two cascaded Among the optical full-adding units, the high voltage of any optical full-adding unit The carry signal output end is connected to one end of a photoelectric converter, and the other end of the photoelectric converter is connected to the low-bit carry signal input end of the next-stage optical full-add unit. The photoelectric converter is used to convert the high-bit carry signal into the high-bit carry signal. The result output by the carry signal output terminal is converted into an electrical signal and output to the low-bit carry signal input terminal of the next-stage optical full addition unit.

6. The optical numerical full adder according to any one of claims 1 to 4, characterized in that each of the optical full adding units includes a first low-order carry optical signal and a second low-order carry optical signal respectively. The two low-bit carry input terminals and the two high-bit carry output terminals respectively used to output the first high-bit carry optical signal and the second high-bit carry optical signal, the first low-bit carry optical signal and the second low-bit carry optical signal The combination of signals represents a low-bit carry, and the combination of the first high-bit carry optical signal and the second high-bit carry optical signal represents a high-bit carry;

Among the at least two optical full-adding units in cascade, the high-order carry output terminal of any optical full-addition unit outputting the first high-order carry optical signal and the input first low-order carry optical signal of the next stage The low-order carry input terminal is connected, and the high-order carry output terminal that outputs the second high-order carry optical signal is connected to the low-order carry input terminal of the next stage that inputs the second low-order carry optical signal.

7. The optical numerical full adder according to any one of claims 1 to 6, characterized in that the optical switch is a microring resonator switch or a Mach-Zehnder interferometer MZI switch.

8. The optical numerical full adder according to any one of claims 1 to 7, characterized in that the optical structures in the at least one optical waveguide, optical beam splitter, optical beam combiner and optical switch are silicon, insulating lining Any one of silicon soi or m-v group compounds on the bottom.

9. An optical numerical full addition method, characterized by including:

Get the input signal to be added and the low-bit carry signal;

According to the signal to be added and the low-bit carry signal, the state of the switch based on the light guidance logic is controlled to control the direction of the input light in at least one optical waveguide;

Obtain the addition result and high-bit carry signal according to the output light conditions;

The high-bit carry signal is output as the low-bit carry signal of the next addition calculation of the signal to be added.

10. The method of claim 9, wherein the low-order carry signal is an electrical signal, and the high-order carry signal is an optical signal;

Outputting the high-order carry signal as the low-order carry signal for the next addition calculation of the signal to be added includes:

Convert the high-bit carry signal into an electrical signal;

The high-bit carry signal converted into an electrical signal is output as a low-bit carry signal for the next addition calculation of the signal to be added.

11. The method of claim 9, wherein the low carry signal includes a first low carry optical signal and a second low carry optical signal, and the high carry signal includes a first high carry optical signal and a second low carry optical signal. High carry optical signal;

Output the first high-bit carry signal as the first low-bit carry optical signal for the next addition calculation of the signal to be added;

Output the second high-order carry signal as the second low-order carry optical signal of the next addition calculation of the signal to be added;

Wherein, the combination of the first low-bit carry optical signal and the second low-bit carry optical signal represents a low-bit carry, and the combination of the first high-bit carry optical signal and the second high-bit carry optical signal represents a high-bit carry.

12. An optical numerical full addition device, characterized in that it includes:

The first acquisition unit is used to acquire the input signal to be added and the low-bit carry signal;

A control unit configured to control the state of the switch based on the light guidance logic according to the signal to be added and the low-bit carry signal to control the direction of the input light in at least one optical waveguide;

The second acquisition unit is used to acquire the addition result and the high-bit carry signal according to the output light; the first output unit is used to use the high-bit carry signal as the low-bit carry for the next addition calculation of the signal to be added. The signal is output.

13. The device according to claim 12, wherein the low-order carry signal is an electrical signal, and the high-order carry signal is an optical signal; The first output unit includes:

A conversion unit for converting the high-bit carry signal into an electrical signal;

The second output unit is configured to output the high-bit carry signal converted into an electrical signal as a low-bit carry signal for the next addition calculation of the signal to be added.

14. The device of claim 12, wherein the low carry signal includes a first low carry optical signal and a second low carry optical signal, and the high carry signal includes a first high carry optical signal and a second low carry optical signal. High carry optical signal;

The first output unit includes:

A third output unit configured to output the first high-order carry signal as the first low-order carry optical signal for the next addition calculation of the signal to be added;

The fourth output unit is used to output the second high-order carry signal as the second low-order carry optical signal for the next addition calculation of the signal to be added;