CN117834030A - Multiplication and addition calculation method and system based on coherent light receiving and transmitting technology - Google Patents
Multiplication and addition calculation method and system based on coherent light receiving and transmitting technology Download PDFInfo
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Abstract
A multiplication and addition calculation method and system based on a coherent light receiving and transmitting technology relates to the technical field of photon calculation, wherein the multiplication and addition calculation method based on the coherent light receiving and transmitting technology comprises the following steps: splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase; modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG by using a mixer; and performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion. The multiplication and addition calculation method based on the coherent light receiving and transmitting technology can realize twice multiplication and once addition in one receiving and transmitting process, the number of completed operations is three times of the data transmission rate, the throughput is large, and the calculation delay is low.
Description
Technical Field
The application relates to the technical field of photon calculation, in particular to a multiplication and addition calculation method and system based on a coherent light receiving and transmitting technology.
Background
An artificial neural network is a collection of nodes with weight connections that can modify the network weights through appropriate feedback, can "learn" and perform complex operations for facial recognition, speech translation, medical diagnostics, etc.
However, a large number of multiply-add operations are required, whether it be a conventional fully-connected feed-forward network or a convolutional neural network, a recurrent neural network, a self-attention mechanism model, or the like, which is currently in widespread attention. These operations account for 55% to 90% of the total computation. Therefore, acceleration for multiply-add operations is an important approach to improving AI (Artificial Intelligence ) computing power.
Photon calculation is a technology for processing and calculating information by utilizing the principle of photonics, and by modulating signals on light and utilizing the characteristics of light such as interference and dispersion, data calculation can be performed on an optical domain, and the optical fiber has the advantages of high bandwidth, low power consumption, low calculation delay and the like. However, incoherent light calculation can only process non-negative data, and limits the expression range of the AI algorithm. In coherent light computation, when the scale of computation is expanded, a wavelength division multiplexing technology is generally adopted, a plurality of light sources with different wavelengths are required to load different data, so that the space cost required by the layout of the light sources is increased, the energy consumed by the light sources is increased, if an optical frequency comb is used for providing the light sources with the plurality of wavelengths, on-chip filters are required to be used for splitting light, and then the different wavelengths can carry different data, and the filters also need complex feedback control links, so that the complexity and the power consumption of peripheral circuits are increased.
Disclosure of Invention
The application provides a multiplication and addition calculation method and system based on a coherent light receiving and transmitting technology, which can realize twice multiplication and once addition in one receiving and transmitting process, and the number of completed operations is three times of the data transmission rate, the throughput is large, and the calculation delay is low.
In a first aspect, an embodiment of the present application provides a multiply-add calculation method based on a coherent optical transceiver technology, where the multiply-add calculation method based on the coherent optical transceiver technology includes:
splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase;
modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively;
after adjusting the two paths of modulated optical signals to equal optical paths, respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG by using a mixer;
and performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
With reference to the first aspect, in one implementation manner, the splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and the same phase includes:
generating an original optical carrier wave with single frequency by using a laser source, and transmitting the original optical carrier wave to a beam splitter for beam splitting;
the optical path length of the two paths of optical carriers is adjusted, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are the same.
With reference to the first aspect, in one implementation manner, a parameter of a first optical delay device connected between the optical splitter and the electro-optical modulation system is controlled by a computer, so that phases of two paths of optical carriers when reaching the electro-optical modulation system are identical.
With reference to the first aspect, in one embodiment, the parameters of the second optical delay device connected between the electro-optical modulation system and the mixer are controlled by a computer, so that the phases of the two modulated optical signals when reaching the mixer are identical.
With reference to the first aspect, in one implementation manner, the modulating the four numbers to be calculated on the I-path and the Q-path on the two optical carriers includes:
generating four groups of analog electric signals, wherein each group of analog electric signals comprises one path of digital;
the four-number information is modulated onto the I-and Q-paths of the two-path optical carrier.
With reference to the first aspect, in an implementation manner, the performing photoelectric conversion on the two paths of optical mixing signals, determining a multiplication and addition result based on the electric signal after photoelectric conversion includes:
photoelectric conversion is carried out on the two paths of optical mixing signals of 0 degree and 180 degrees;
sampling the electric signal obtained by photoelectric conversion, and correcting the sampled signal;
and generating a multiplication and addition calculation result according to the sampling signal.
With reference to the first aspect, in one embodiment, a reference signal is sent in advance to calculate the intensity and phase variation to compensate for the intensity and phase information of the two signals obtained by sampling.
In a second aspect, an embodiment of the present application provides a multiply-add computing system based on a coherent optical transceiver technology, where the multiply-add computing system based on the coherent optical transceiver technology includes:
a laser source for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
the electro-optical modulation system is used for respectively modulating four numbers to be calculated on an I path and a Q path of the two paths of optical carriers;
the mixer is used for respectively generating two paths of modulated optical signals into two paths of optical mixing signals of 0 DEG and 180 DEG;
the balance detector is used for performing photoelectric conversion on the two paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
With reference to the second aspect, in one embodiment, the control unit includes:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
With reference to the second aspect, in one embodiment, the control unit further includes:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
The beneficial effects that technical scheme that this application embodiment provided include at least:
according to the multiplication and addition calculation method based on the coherent light receiving and transmitting technology, the obtained original light carrier is split and adjusted into two paths of light carriers with the same frequency and the same phase; modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG by using a mixer; and performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
Therefore, the method can realize twice multiplication and once addition in one receiving and transmitting process, the number of completed operations is three times of the data transmission rate, the throughput is high, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, the present application can expand the calculation scale by using the techniques such as wavelength division multiplexing. The multiplication and addition operation is widely applied in the fields of scientific calculation, artificial intelligence and the like, compared with a digital circuit, the invention greatly saves hardware overhead and time cost, and compared with other optical calculation structures, the invention simultaneously utilizes the I path and the Q path of light, realizes multiplexing, reduces light source cost and well meets the requirement of future high-speed calculation.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a method for multiply-add calculation based on coherent optical transceiver technology in the present application;
fig. 2 is a block diagram of an embodiment of a multiply-add computing system based on coherent optical transceiver technology.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the foregoing drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. The terms "first," "second," and "third," etc. are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order, and are not limited to the fact that "first," "second," and "third" are not identical.
In the description of embodiments of the present application, "exemplary," "such as," or "for example," etc., are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary," "such as" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "such as" or "for example," etc., is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, unless otherwise indicated, "/" means or, for example, a/B may represent a or B; the text "and/or" is merely an association relation describing the associated object, and indicates that three relations may exist, for example, a and/or B may indicate: the three cases where a exists alone, a and B exist together, and B exists alone, and in addition, in the description of the embodiments of the present application, "plural" means two or more than two.
In some of the processes described in the embodiments of the present application, a plurality of operations or steps occurring in a particular order are included, but it should be understood that these operations or steps may be performed out of the order in which they occur in the embodiments of the present application or in parallel, the sequence numbers of the operations merely serve to distinguish between the various operations, and the sequence numbers themselves do not represent any order of execution. In addition, the processes may include more or fewer operations, and the operations or steps may be performed in sequence or in parallel, and the operations or steps may be combined.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present application provides a multiply-add calculation method based on a coherent optical transceiver technology.
In an embodiment, referring to fig. 1, fig. 1 is a flow chart of an embodiment of a multiplication and addition calculation method based on a coherent light transceiving technology in the present application. As shown in fig. 1, the multiply-add calculation method based on the coherent optical transceiver technology includes:
s1, splitting the acquired original optical carrier wave and adjusting the split original optical carrier wave into two paths of optical carrier waves with the same frequency and phase.
As shown in fig. 2, specifically, in this embodiment, step S1 includes:
s11, generating an original optical carrier wave with single frequency by utilizing a laser source, and sending the original optical carrier wave to a beam splitter for beam splitting;
s12, adjusting the optical path length of the two paths of optical carriers to enable the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system.
In particular, the parameters of the first optical delay device connected between the optical splitter and the electro-optical modulation system can be controlled by a computer, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are identical.
In this embodiment, the electro-optic modulation system includes an arbitrary waveform generator and an I/Q modulator.
S2, modulating four numbers to be calculated on an I path and a Q path of the two paths of optical carriers respectively.
Specifically, in the present embodiment, step S2 includes:
s21, generating four groups of analog electric signals, wherein each group of analog electric signals comprises one path of digital;
s22, modulating information of four numbers on an I path and a Q path of the two paths of optical carriers.
It should be noted that, in this embodiment, the multiplication and addition to be completed is calculated as: a, a 1 b 1 +a 2 b 2 The information of four numbers is a 1 、b 1 、a 2 、b 2 。
S3, after the two paths of modulated optical signals are adjusted to equal optical paths, a mixer is used for respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG.
In particular, the parameters of the second optical delay device connected between the electro-optical modulation system and the mixer can be controlled by a computer, so that the phases of the two paths of modulated optical signals when reaching the mixer are identical. And then a 180-degree optical mixer is adopted to generate two paths of optical mixing signals of 0 degree and 180 degree.
S4, performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
Specifically, in the present embodiment, step S4 includes:
s41, performing photoelectric conversion on two paths of optical mixing signals of 0 DEG and 180 DEG;
s42, sampling the electric signal obtained by photoelectric conversion, and correcting the sampled signal;
s43, generating a multiplication and addition calculation result according to the sampling signal.
In this embodiment, a balance detector is used to photoelectrically convert the mixed signals of 0 ° and 180 ° and then a signal acquisition device is used to sample the photoelectrically converted electrical signals. Since the two signals may have intensity attenuation and phase shift during transmission, the sampled data may need to be processed and corrected, for example, by sending a reference signal in advance to calculate the intensity and phase variation, and compensating the intensity and phase information during actual calculation.
The mathematical principles of the present application are described below:
suppose that the multiplication and addition to be performed is calculated as a 1 b 1 +a 2 b 2 The I-channel optical carrier is Ccos (ω) c t), Q path optical carrier isWherein C is the amplitude of the light source, the signal is modulated onto the optical carrier using the I/Q modulator, and the modulated signal is:
M A (t)＝a 1 C cosω c t+a 2 C sinω c t＝AC cos(ω c t-φ A )
M B (t)＝b 1 C cosω c t+b 2 C sinω c t＝BC cos(ω c t-φ B )
according to the Euler formula, the amplitudes of the two signals are respectivelyAnd->The phases are +.>And->
After the two signals are respectively transmitted to two input ends of the 180-degree optical mixer in an equal optical path, two paths of optical mixing signals of 0 degree and 180 degrees are generated, and the two paths of optical mixing signals are as follows:
E 1 ＝CAcos(ω c t-φ A )+CBcos(ω c t-φ B )
E 2 ＝CAcos(ω c t-φ A )-CBcos(ω c t-φ B )
pair E 1 、E 2 Photoelectric conversion is performed by using a balance detector, and the converted electric signal is as follows:
i 1 ＝εC 2 ABcos(ω c t-φ A )cos(ω c t-φ B )
wherein epsilon is the sensitivity of the balanced detector, and the low-pass characteristic of the receiving end can be converted into the following formula after eliminating the high-frequency component:
the exact value of the multiply-add calculation can be directly calculated during the sampling and quantization process. Based on the principle, the two multiplications and one addition are completed by one transmission, two wavelengths are not needed to be used for loading data to be calculated respectively, the number of completed operations is three times of the data transmission rate, the throughput is large, the calculation delay is low, and therefore the space cost and the control cost of the light source are reduced.
In summary, in the multiply-add calculation method based on the coherent optical transceiver technology in the present application, the obtained original optical carrier is split and adjusted into two paths of optical carriers with the same frequency and the same phase; modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively; after adjusting the two paths of modulated optical signals to equal optical paths, respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG by using a mixer; and performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
Therefore, the method can realize twice multiplication and once addition in one receiving and transmitting process, the number of completed operations is three times of the data transmission rate, the throughput is high, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, the present application can expand the calculation scale by using the techniques such as wavelength division multiplexing. The multiplication and addition operation is widely applied in the fields of scientific calculation, artificial intelligence and the like, compared with a digital circuit, the invention greatly saves hardware overhead and time cost, and compared with other optical calculation structures, the invention simultaneously utilizes the I path and the Q path of light, realizes multiplexing, reduces light source cost and well meets the requirement of future high-speed calculation.
In a second aspect, an embodiment of the present application further provides a multiply-add computing system based on a coherent optical transceiver technology.
In an embodiment, referring to fig. 2, fig. 2 is a block diagram of a multiplication and addition computing system based on a coherent light transmission and reception technology according to the present application. As shown in fig. 2, the multiply-add computing system based on the coherent optical transceiver technology includes:
a laser source for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
the electro-optical modulation system is used for respectively modulating four numbers to be calculated on an I path and a Q path of the two paths of optical carriers;
the mixer is used for respectively generating two paths of modulated optical signals into two paths of optical mixing signals of 0 DEG and 180 DEG;
the balance detector is used for performing photoelectric conversion on the two paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
Further, in an embodiment, the control unit includes:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
Further, in an embodiment, the control unit further includes:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
The following describes the principle of the multiplication and addition computing system based on the coherent light transceiving technology in the application:
the laser source is used for generating an optical carrier wave to be modulated, the optical splitter is used for dividing the optical carrier wave from the laser source into two paths, and the first optical delay device is used for adjusting the two paths of optical paths led out by the optical splitter so as to ensure that the phases are identical when the optical paths reach an electro-optical modulation system (comprising an arbitrary waveform generator and an I/Q modulator). The random waveform generator is used for converting data to be calculated into an electric analog signal, the I/Q modulator is used for modulating an electric signal on an optical carrier, the second optical delay device is used for adjusting two paths of light output by the I/Q modulator to an equal optical path, the 180-degree optical mixer is used for generating 0-degree and 180-degree two paths of optical mixing signals, the balance detector is used for carrying out photoelectric conversion on the 0-degree and 180-degree mixing signals, the signal acquisition equipment is used for sampling the electric signal after photoelectric conversion, and the computer is used for adjusting parameters, displaying results, processing data and the like.
Specifically, the laser source generates an optical carrier wave with a single frequency and sends the optical carrier wave to the optical splitter, and the optical splitter divides the optical carrier wave into two beams of light to be modulated respectively. The data to be calculated is processed by a computer, sent to an arbitrary waveform generator to generate an electrical analog signal, and modulated onto an optical carrier by an I/Q modulator. According to the principle of an I/Q modulator, four numbers are modulated on IQ two paths of light at the same time. And the parameters of the second optical delay device are regulated by a computer so that two beams of light have equal optical paths from the modulator to the optical mixer. The mixer is used for generating two paths of optical mixing signals of 0 DEG and 180 deg. The balance detector performs photoelectric conversion on signals of 0 DEG and 180 deg. And finally, sampling the electric signal by using a signal acquisition device. Since the two signals may generate intensity attenuation and phase shift during transmission, the sampled data needs to be processed and corrected finally, and a reference signal can be sent in advance to calculate the intensity and phase variation, and the intensity and phase information is compensated during actual calculation.
Thus, the two multiplications and one addition in one transceiving process are completed.
In summary, the multiply-add computing system based on coherent optical transceiver technology in the present application includes a laser source, an optical splitter, an electro-optical modulation system, a mixer, a balance detector, and a control unit. The laser source is used for outputting an original optical carrier wave with single frequency; the optical splitter is used for dividing the received original optical carrier into two paths of optical carriers with the same frequency; the electro-optical modulation system is used for modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively; the mixer is used for respectively generating two paths of optical mixing signals with the total of 0 DEG and 180 DEG for the two paths of modulated optical signals; the balance detector is used for carrying out photoelectric conversion on the two paths of optical mixing signals; the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is further used for determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
Therefore, the method can realize twice multiplication and once addition in one receiving and transmitting process, the number of completed operations is three times of the data transmission rate, the throughput is high, and the calculation delay is low. Meanwhile, all optical devices can be integrated on a chip, and the optical device can be expanded in a large scale. In addition, the present application can expand the calculation scale by using the techniques such as wavelength division multiplexing. The multiplication and addition operation is widely applied in the fields of scientific calculation, artificial intelligence and the like, compared with a digital circuit, the invention greatly saves hardware overhead and time cost, and compared with other optical calculation structures, the invention simultaneously utilizes the I path and the Q path of light, realizes multiplexing, reduces light source cost and well meets the requirement of future high-speed calculation.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. The multiplication and addition calculation method based on the coherent light receiving and transmitting technology is characterized by comprising the following steps of:
splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase;
modulating four numbers to be calculated on an I path and a Q path of two paths of optical carriers respectively;
after adjusting the two paths of modulated optical signals to equal optical paths, respectively generating two paths of optical mixing signals of 0 DEG and 180 DEG by using a mixer;
and performing photoelectric conversion on the two paths of optical mixing signals, and determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
2. The method for multiply-add calculation based on coherent optical transceiver technology as set forth in claim 1, wherein said splitting and adjusting the acquired original optical carrier into two paths of optical carriers with the same frequency and phase comprises:
generating an original optical carrier wave with single frequency by using a laser source, and transmitting the original optical carrier wave to a beam splitter for beam splitting;
the optical path length of the two paths of optical carriers is adjusted, so that the phases of the two paths of optical carriers when reaching the electro-optical modulation system are the same.
3. The multiplication-addition calculation method based on the coherent light transmission-reception technology according to claim 2, wherein:
the parameters of a first optical delay device connected between the optical splitter and the electro-optical modulation system are controlled by a computer, so that the phases of two paths of optical carriers when reaching the electro-optical modulation system are identical.
4. The multiplication-addition calculation method based on the coherent light transmission-reception technology according to claim 1, wherein:
the parameters of a second optical delay device connected between the electro-optical modulation system and the mixer are controlled by a computer, so that the phases of the two paths of modulated optical signals when reaching the mixer are the same.
5. The method for multiply-add calculation based on coherent optical transceiver technology according to claim 1, wherein said modulating four numbers to be calculated on the I-path and the Q-path of two optical carriers respectively comprises:
generating four groups of analog electric signals, wherein each group of analog electric signals comprises one path of digital;
the four-number information is modulated onto the I-and Q-paths of the two-path optical carrier.
6. The method for multiply-add computation based on coherent optical transceiver technology according to claim 1, wherein said photoelectrically converting the two optical mixed signals and determining the multiply-add computation result based on the photoelectrically converted electrical signals comprises:
photoelectric conversion is carried out on the two paths of optical mixing signals of 0 degree and 180 degrees;
sampling the electric signal obtained by photoelectric conversion, and correcting the sampled signal;
and generating a multiplication and addition calculation result according to the sampling signal.
7. The method for multiply-add computation based on coherent optical transceiver technology of claim 6, wherein:
a reference signal is sent in advance for calculating the intensity and phase variation to compensate the intensity and phase information of the two signals obtained by sampling.
8. The multiplication and addition computing system based on the coherent light receiving and transmitting technology is characterized by comprising the following components:
a laser source for outputting a single frequency of an original optical carrier;
the optical splitter is used for splitting the received original optical carrier into two paths of optical carriers with the same frequency;
the electro-optical modulation system is used for respectively modulating four numbers to be calculated on an I path and a Q path of the two paths of optical carriers;
the mixer is used for respectively generating two paths of modulated optical signals into two paths of optical mixing signals of 0 DEG and 180 DEG;
the balance detector is used for performing photoelectric conversion on the two paths of optical mixing signals;
and the control unit is used for enabling the phases of the two paths of optical carriers to be the same when the two paths of optical carriers reach the electro-optical modulation system and enabling the phases of the two paths of modulated optical signals to be the same when the two paths of modulated optical signals reach the mixer, and the control unit is also used for determining a multiplication and addition calculation result based on the electric signals after photoelectric conversion.
9. The system of claim 8, wherein the control unit comprises:
a first optical delay connected between the optical splitter and the electro-optic modulation system;
a second optical delay connected between the electro-optic modulation system and the mixer;
and the computer is used for controlling the parameters of the first optical delay device to enable the phases of the two paths of optical carriers to be the same when reaching the electro-optical modulation system, and controlling the parameters of the second optical delay device to enable the phases of the two paths of modulated optical signals to be the same when reaching the mixer.
10. The system of claim 9, wherein the control unit further comprises:
and the signal acquisition equipment is connected between the balance detector and the computer and is used for sampling the electric signals obtained after photoelectric conversion and inputting the sampled data to the computer after correction.
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