A coherent beam combining transmitting device, method, equipment, medium and optical communication terminal

Abstract

The application discloses a coherent beam combining emitting device, method, equipment, medium and optical communication terminal, which is used for improving system integration, reducing device volume, meeting strict restrictions of space equipment on weight and volume, and improving flexibility and deployment efficiency of the system. The device comprises a polarization rotation beam splitter, which is used for dividing signal light to be emitted into two single polarization lights; a first optical splitter and a second optical splitter, which are used for dividing received light into multiple optical signals; a phase shifter module, which is used for performing phase shifting operation on each group of optical signals; a beam combining module, which is used for combining each group of optical signals into one output optical signal to obtain multiple output optical signals; a photoelectric detector, which is used for detecting beam combining power of the multiple output optical signals and sending the beam combining power to a control module; and the control module is used for taking the beam combining power as an evaluation function, applying at least one disturbance to voltage parameters of the phase shifting operation, re-measuring the beam combining power, and stopping until the beam combining power meets a preset condition.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a coherent beam combining transmitter, method, apparatus, medium and optical communication terminal. Background Technology

[0002] Vector optical phased arrays precisely control the direction and shape of laser beams through spatial phase modulation technology, forming flexible one-to-many and many-to-one laser links to achieve high-speed, long-distance, and high-precision laser communication. For rapid shaping of multiple beams, it is necessary to ensure that the pointing direction and wavefront phase of the optical signals of each wavelength are completely consistent to achieve coherent beam combining and obtain a stable high-gain emitted beam.

[0003] To compensate for the phase difference between the various signal beams, a high-precision phase shifter needs to be applied to each beam to achieve high-precision beam pointing. Furthermore, for non-fully polarization-maintaining systems, standard single-mode fiber suffers from polarization state rotation, which can lead to inconsistent polarization of multiple beams after passing through different single-mode fibers or optical devices. Therefore, a polarization controller needs to be applied to each beam to compensate for its polarization.

[0004] Existing technologies typically use independent phase shifters and polarization controllers for each beam to improve beam combining efficiency. However, these technologies suffer from poor integration, high cost, and increased system size and weight as the number of beams increases, failing to meet the stringent weight and size constraints of space equipment. Summary of the Invention

[0005] This application provides a coherent beam combining transmitter, method, apparatus, medium, and optical communication terminal to improve system integration, reduce device size, meet the strict weight and volume restrictions of space equipment, and enhance system flexibility and deployment efficiency.

[0006] In a first aspect, embodiments of this application provide a coherent beam combining and transmitting device, the device comprising: a polarization rotating beam splitter, a first optical splitter, a second optical splitter, a phase shifter module, a beam combining module, a photodetector, and a control module, wherein...

[0007] The polarization rotating beam splitter is used to split the signal light to be emitted into two single-polarized beams, and the two single-polarized beams are respectively input into the first optical splitter and the second optical splitter;

[0008] The first optical splitter and the second optical splitter are connected to the polarization rotating beam splitter to split the received light into multiple optical signals. The multiple optical signals output by the first optical splitter and the multiple optical signals output by the second optical splitter are combined in pairs to obtain multiple sets of optical signals.

[0009] The phase shifter module is connected to the first optical splitter and the second optical splitter, and is used to perform phase shifting operations on each group of optical signals;

[0010] The beam combining module is connected to the phase shifter module and is used to combine the various groups of optical signals output by the phase shifter module into one output optical signal to obtain multiple output optical signals.

[0011] The photodetector is used to detect the combined power of the multiple output optical signals output by the beam combining module, and to send the combined power to the control module.

[0012] The control module is used to apply at least one disturbance to the voltage parameters of the phase shifting operation, using the combined power as an evaluation function, and re-measure the combined power until the combined power meets the preset conditions.

[0013] As an optional implementation, the control module is specifically used to: use the combined power as the evaluation function of a preset control algorithm and perform iterations until the evaluation function converges to meet a preset condition or the number of iterations reaches a preset number; randomly perturb the voltage parameters of the phase shifting operation, estimate the gradient direction of the evaluation function change based on the change of the evaluation function, and update the voltage parameters in the next iteration based on the gradient direction.

[0014] As an optional implementation, the phase shifter module includes multiple phase shifting units;

[0015] The phase shifter module is specifically used to: perform at least one phase shift operation on each of the two optical signals in each group of optical signals using the phase shifting unit.

[0016] As an optional implementation, the phase shifting unit includes a first phase shifting component, a plurality of second phase shifting components, and a plurality of couplers, wherein the couplers are connected between the first phase shifting component and the second phase shifting components, and between adjacent second phase shifting components. The first phase shifting component includes two phase shifters, and the second phase shifting component includes one or two phase shifters.

[0017] As an optional implementation, the first optical splitter and the second optical splitter split the same number of optical signals.

[0018] As an optional implementation, the device further includes: a non-polarizing amplifier and a beam splitter;

[0019] The non-polarity-maintaining amplifier is connected to the beam combining module and is used to amplify the multiple output optical signals output by the beam combining module.

[0020] The beam splitter is connected to the non-polarization-maintaining amplifier and is used to split the target light signal from the light signal output by the non-polarization-maintaining amplifier and send the target light signal to the photodetector.

[0021] Secondly, embodiments of this application provide a coherent beam combining emission method, the method comprising:

[0022] Acquire the signal light to be emitted;

[0023] The signal light is split into two single-polarized lights, and each of the two single-polarized lights is further divided into multiple optical signals. The multiple optical signals split from the two single-polarized lights are then combined in pairs to obtain multiple sets of optical signals.

[0024] Each group of optical signals is phase-shifted, and the phase-shifted optical signals are combined into one output optical signal to obtain multiple output optical signals.

[0025] The combined power of the multiple output optical signals is detected, and the combined power is used as an evaluation function. At least one perturbation is applied to the voltage parameters of the phase shifting operation, and the combined power is measured again until the combined power meets the preset conditions.

[0026] As an optional implementation, applying at least one perturbation to the voltage parameters of the phase-shifting operation and re-measuring the combined power until the combined power meets a preset condition includes:

[0027] The combined power is used as the evaluation function of the preset control algorithm, and the iteration is performed until the evaluation function converges to meet the preset condition or the number of iterations reaches the preset number. The voltage parameters of the phase shift operation are randomly perturbed, and the gradient direction of the evaluation function change is estimated according to the change of the evaluation function. The voltage parameters are updated in the next iteration based on the gradient direction.

[0028] As an optional implementation, the random perturbation of the voltage parameters of the phase-shifting operation includes:

[0029] A perturbation voltage is generated, and the voltage parameters of the phase-shifting operation process are positively and / or negatively perturbed by the perturbation voltage.

[0030] As an optional implementation, the two single-polarized light sources produce the same number of optical signal paths.

[0031] As an optional implementation, the phase-shifting operation on each group of optical signals includes:

[0032] Each of the two optical signals in each group of optical signals undergoes at least one phase shifting process.

[0033] Thirdly, embodiments of this application provide another coherent beam combining transmitter, the device comprising:

[0034] The receiving unit is used to acquire the signal light to be transmitted;

[0035] The processing unit is used to split the signal light into two single-polarized lights, split the two single-polarized lights into multiple optical signals, and combine the multiple optical signals split from the two single-polarized lights in pairs to obtain multiple sets of optical signals.

[0036] The phase-shifting unit is used to perform phase-shifting operations on each group of optical signals and combine the phase-shifted optical signals into a single output optical signal to obtain multiple output optical signals.

[0037] The control unit is used to detect the combined power of the multiple output optical signals, and use the combined power as an evaluation function to apply at least one perturbation to the voltage parameters of the phase shifting operation, and re-measure the combined power until the combined power meets the preset conditions.

[0038] As an optional implementation, the control unit is specifically used for:

[0039] The combined power is used as the evaluation function of the preset control algorithm, and the iteration is performed until the evaluation function converges to meet the preset condition or the number of iterations reaches the preset number. The voltage parameters of the phase shift operation are randomly perturbed, and the gradient direction of the evaluation function change is estimated according to the change of the evaluation function. The voltage parameters are updated in the next iteration based on the gradient direction.

[0040] As an optional implementation, the control unit is specifically used for:

[0041] A perturbation voltage is generated, and the voltage parameters of the phase-shifting operation process are positively and / or negatively perturbed by the perturbation voltage.

[0042] As an optional implementation, the two single-polarized light sources produce the same number of optical signal paths.

[0043] As an optional implementation, the phase-shifting unit is specifically used for:

[0044] Each of the two optical signals in each group of optical signals undergoes at least one phase shifting process.

[0045] Fourthly, embodiments of this application provide an optical communication terminal, including: a transceiver antenna, a beam combiner module, a power supply module, an integrated coherent receiver, and a coherent beam combiner transmitter provided in the first aspect of embodiments of this application;

[0046] The coherent beam combining transmitter is used to beamform the signal light to be emitted and send the beamformed optical signal to the beam combining module.

[0047] The beam combining module is used to coherently combine the multiple output optical signals after beamforming by the coherent beam combining transmitter into a single transmitted light, and transmit it to other terminals through the transceiver antenna.

[0048] The integrated coherent receiver is used to coherently demodulate the signal light received by the transceiver antenna;

[0049] The power module is used to supply power to the transceiver antenna, the beam combiner module, the integrated coherent receiver, and the coherent beam combiner transmitter.

[0050] Fifthly, embodiments of this application provide another optical communication terminal, the terminal comprising: an optical head, a communication processor, and a phased array transmitter, wherein the optical head comprises a transceiver antenna and a beam combiner module, the communication processor comprises a first power supply module, a transmitting processor, and a receiving processor, and the phased array transmitter comprises a second power supply module, a multi-channel optical amplification module, and the coherent beam combiner transmitter provided in the first aspect of embodiments of this application.

[0051] In a sixth aspect, embodiments of this application provide a coherent beam combining transmitter device, the device including a processor and a memory, the memory being used to store a program executable by the processor, the processor being used to read the program in the memory and execute the method described in any one of the second aspects.

[0052] In a seventh aspect, embodiments of this application also provide a computer storage medium having a computer program stored thereon, which, when executed by a processor, is used to implement the steps of the method described in the second aspect above.

[0053] Eighthly, this application provides a computer program product comprising: computer program code that, when run on a computer, causes the computer to perform the method described in any one of the second aspects.

[0054] The beneficial effects of the embodiments of this application are as follows:

[0055] This application provides a coherent beam combining and transmitting device, method, apparatus, medium, and optical communication terminal. The method involves splitting the signal light to be transmitted into two single-polarized beams, then further dividing each single-polarized beam into multiple optical signals. These multiple optical signals are then combined in pairs to obtain multiple sets of optical signals. Each set of optical signals undergoes at least one phase-shifting operation. Finally, the optical signals are combined into a single output optical signal, resulting in multiple output optical signals. The combined power of the multiple output optical signals is detected, and the combined power is used as an evaluation function. At least one perturbation is applied to the voltage parameters of the phase-shifting operation, and the combined power is measured again until the combined power meets a preset condition. Compared to existing technologies that use independent phase shifters and polarization controllers for each beam, this application achieves coherent transmission of multiple beams based on integrated polarization and phase control. This significantly reduces device size, improves system integration, meets the stringent weight and volume limitations of space equipment, and enhances system flexibility and deployment efficiency.

[0056] These or other aspects of this application will become more apparent in the following description of embodiments. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 A schematic diagram of the architecture of a coherent beam combining transmitter provided in an embodiment of this application;

[0059] Figure 2 This is a schematic diagram of the structure of a coherent beam combining transmitter provided in an embodiment of this application;

[0060] Figure 3 A schematic flowchart illustrating a coherent beam combining emission method provided in an embodiment of this application;

[0061] Figure 4 This is a schematic diagram of another coherent beam combining transmitter provided in an embodiment of this application;

[0062] Figure 5 This is a schematic diagram of the structure of a coherent beam combining and transmitting device provided in an embodiment of this application;

[0063] Figure 6 This is a schematic diagram of the structure of an optical communication terminal provided in an embodiment of this application;

[0064] Figure 7 This is a schematic diagram of the structure of another optical communication terminal provided in an embodiment of this application. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] In the embodiments of this application, the term "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0067] The application scenarios described in this application are for the purpose of more clearly illustrating the technical solutions of this application, and do not constitute a limitation on the technical solutions provided in this application. Those skilled in the art will understand that with the emergence of new application scenarios, the technical solutions provided in this application are also applicable to similar technical problems. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0068] Before introducing the coherent beam combining and emission scheme provided in the embodiments of this application, the technical background of the embodiments of this application will be described in detail below for ease of understanding.

[0069] Vector optical phased arrays precisely control the direction and shape of laser beams through spatial phase modulation technology, forming flexible one-to-many and many-to-one laser links to achieve high-speed, long-distance, and high-precision laser communication. For rapid shaping of multiple beams, it is necessary to ensure that the pointing direction and wavefront phase of the optical signals of each wavelength are completely consistent to achieve coherent beam combining and obtain a stable high-gain emitted beam.

[0070] To compensate for the phase difference between the various signal beams, a high-precision phase shifter needs to be applied to each beam to achieve high-precision beam pointing. Furthermore, for non-fully polarization-maintaining systems, standard single-mode fiber suffers from polarization state rotation, which can lead to inconsistent polarization of multiple beams after passing through different single-mode fibers or optical devices. Therefore, a polarization controller needs to be applied to each beam to compensate for its polarization.

[0071] Existing technologies typically use independent phase shifters and polarization controllers for each beam to improve beam combining efficiency. However, these technologies suffer from poor integration, high cost, and increased system size and weight as the number of beams increases, failing to meet the stringent weight and size constraints of space equipment.

[0072] In view of this, the coherent beam combining and transmitting device, method, apparatus, medium and optical communication terminal provided in this application splits the signal light to be transmitted into two single-polarized beams, then divides each single-polarized beam into multiple optical signals, combines the multiple optical signals from the two single-polarized beams in pairs to obtain multiple sets of optical signals, then performs at least one phase shift operation on each set of optical signals, and then combines each set of optical signals into one output optical signal to obtain multiple output optical signals, and detects the combined power of the multiple output optical signals, uses the combined power as an evaluation function, applies at least one perturbation to the voltage parameter of the phase shift operation, and remeasures the combined power until the combined power meets the preset conditions. Compared with the prior art in which each beam uses an independent phase shifter and polarization controller, this application realizes coherent transmission of multiple beams based on polarization and phase integrated control, which can significantly reduce the size of the device, improve the integration of the system, meet the strict weight and volume restrictions of space equipment, and improve the flexibility and deployment efficiency of the system.

[0073] It should be noted that the embodiments of this application employ chip-integrated polarization rotating beam splitter, optical splitter, phase shifter, and polarization rotating beam combiner to achieve integrated polarization and phase control of multiple phased array beams, thereby significantly reducing device size, improving system integration, meeting the strict weight and volume limitations of space equipment, and enhancing system flexibility and deployment efficiency.

[0074] After introducing the technical background of the embodiments of this application, the structure of the coherent beam combining and transmitting device provided in the embodiments of this application will be described below.

[0075] like Figure 1 As shown, it is a structural schematic diagram of a coherent beam combining and transmitting device provided in an embodiment of this application. The coherent beam combining and transmitting device includes: a polarization rotating beam splitter 11, a first optical splitter 12, a second optical splitter 123, a phase shifter module 14, a beam combining module 15, a photodetector 16, and a control module 17.

[0076] The polarization rotating beam splitter 11 is used to split the signal light to be emitted into two single-polarized beams, and the two single-polarized beams are respectively input into the first optical splitter 12 and the second optical splitter 13.

[0077] The signal light to be emitted is the signal light modulated by the modulator after the laser emitted by the laser is modulated.

[0078] The first optical splitter 12 and the second optical splitter 13 are connected to the polarization rotating beam splitter 11 to split the received light into multiple optical signals. The multiple optical signals output by the first optical splitter and the multiple optical signals output by the second optical splitter are combined in pairs to obtain multiple sets of optical signals.

[0079] In specific implementation, the first optical splitter 12 and the second optical splitter 13 are both 1-to-N optical splitters, which can divide the two single-polarized beams split by the polarization rotation beam splitter into N paths with equal power, where N is a natural number greater than 1.

[0080] In practical applications, the first optical splitter 12 and the second optical splitter 13 split the optical signals into the same number of paths.

[0081] The phase shifter module 14 is connected to the first optical splitter 12 and the second optical splitter 13, and is used to perform phase shifting operations on each group of optical signals.

[0082] In practical applications, the phase shifter module 14 includes multiple phase shifting units. Each phase shifting unit performs a phase shifting operation on a set of optical signals. Specifically, each phase shifting unit can perform at least one phase shifting operation on two optical signals in a set of optical signals.

[0083] In a specific implementation, the phase shifting unit includes a first phase shifting component, multiple second phase shifting components, and multiple couplers. The couplers are connected between the first phase shifting component and the second phase shifting component, as well as between adjacent second phase shifting components. The first phase shifting component includes two phase shifters, and the second phase shifting component includes one or two phase shifters.

[0084] The beam combining module 15 is connected to the phase shifter module 14 and is used to combine the various groups of optical signals output by the phase shifter module 14 into one output optical signal to obtain multiple output optical signals.

[0085] In practical applications, the beam combining module 15 includes multiple polarization rotating beam combiners. Each polarization rotating beam combiner is used to combine a group of optical signals output from a phase shifting unit into one output optical signal, thereby obtaining multiple output optical signals. The multiple output signal lights are output at the output end by mechanical transfer (MT) of the fiber matrix, and the interface is a mechanical transfer-pull-off (MTP) connector.

[0086] The photodetector 16 is used to detect the combined power of the multiple output optical signals output by the beam combining module 15 and send the combined power to the control module 17.

[0087] The control module 17 is used to apply at least one disturbance to the voltage parameters of the phase-shifting operation using the combined power as an evaluation function, and remeasure the combined power until the combined power meets the preset conditions.

[0088] The preset conditions can be set according to the actual situation. For example, the preset conditions are that the combined power reaches the maximum value or the combined power is greater than the set value.

[0089] In specific implementation, the control module 17 is specifically used to: use the combined power as the evaluation function of the preset control algorithm and perform iteration until the evaluation function converges to meet the preset conditions or the number of iterations reaches the preset number; for the voltage parameters of the random perturbation phase shift operation, estimate the gradient direction of the evaluation function change according to the change of the evaluation function, and update the voltage parameters in the next iteration based on the gradient direction.

[0090] In this embodiment, the control module 17 applies a control voltage to the phase shifter in the phase shifting unit through a preset control algorithm to adjust the evaluation function so that it continuously approaches the maximum value (assuming the preset condition is that the combined power reaches the maximum value), thereby realizing simultaneous control of the polarization and phase of multiple beams to achieve efficient coherent beam combining.

[0091] In practical applications, the coherent beam combining and transmitting device provided in this application embodiment may further include: a non-polarizing amplifier and a beam splitter.

[0092] The non-polarization-maintaining amplifier, connected to the beam combiner module, is used to amplify the multiple output optical signals from the beam combiner module. The beam splitter, connected to the non-polarization-maintaining amplifier, is used to split the target optical signal from the output optical signal of the non-polarization-maintaining amplifier and send the target optical signal to the photodetector. Another part of the optical signal is transmitted into the space field through the beam splitter, realizing phased array multi-channel transmission.

[0093] The following is combined with Figure 2 Taking the phase-shifting unit as an example, which includes a first phase-shifting component and two second phase-shifting components, and the second phase-shifting component includes a phase shifter, the specific structure of the coherent beam combining transmitter provided in the embodiments of this application will be described in detail.

[0094] like Figure 2 As shown in the embodiment of this application, the coherent beam combining and transmitting device includes: a polarization rotating beam splitter 21, a first optical splitter 22, a second optical splitter 23, multiple phase shifting units 24, multiple polarization rotating beam combiners 25, multiple non-polarization-maintaining amplifiers 26, multiple collimators 27, a beam splitter 28, a photodetector 29, and a control module 30. The phase shifting unit 24 includes a first phase shifting component 241 and a second phase shifting component 242. Couplers are connected between the first phase shifting component 241 and the second phase shifting component 242, and between adjacent second phase shifting components 242. The first phase shifting component 241 includes two phase shifters, and the second phase shifting component 242 includes one phase shifter.

[0095] In practical applications, the signal light is split into two single-polarized beams by the polarization rotating beam splitter 21. The two single-polarized beams are input to the first optical splitter 22 and the second optical splitter 23, respectively. The first optical splitter 22 and the second optical splitter 23 each split one single-polarized beam into N beams with equal power (N is a natural number greater than 1). Then, the N optical signals split by the first optical splitter 22 and the second optical splitter 23 are combined in pairs to obtain multiple sets of optical signals. Each set of optical signals is input to a phase shifting unit 24. The first phase shifting component 241 and the second phase shifting component 242 in the phase shifting unit 24 perform at least one phase shifting operation on the two optical signals in each set of optical signals, so as to achieve high-speed phase and precise polarization control of each beam.

[0096] Each optical signal output from phase-shifting unit 24 is combined into an output optical signal by polarization rotation combiner 25. The output optical signal is output by fiber matrix MT, with an interface of MTP connector. After passing through non-polarization-maintaining amplifier 26, it is transmitted into space through collimator 27. Beam splitter 28 splits a portion of the weak light into photodetector 29, while the other portion of the light is transmitted into the space field through beam splitter, realizing phased array multi-path transmission.

[0097] The combined beam power detected by photodetector 29 is used as the evaluation function of the preset control algorithm and input to control module 30. Control module 30 applies control voltage to each phase shifter in the phase shifting unit through the preset control algorithm to adjust the evaluation function so that it continuously approaches the maximum value, thereby realizing simultaneous polarization and phase control of multiple beams to achieve efficient coherent beam combining.

[0098] In the above coherent beam combining transmitter, the transmission matrix of the i-th path can be expressed as the following formula (1):

[0099] (1)

[0100] in, , , , It is related to the amount of phase shift applied by the four phase shifters in phase shifting unit 24.

[0101] Considering the polarization controller of beamforming and the rotation of state of polarization (RSOP) introduced by non-polarization-maintaining devices, the polarization evolution process of the polarization multiplexed signal light can be expressed as the following formula (2):

[0102]

[0103] (2)

[0104] in, , , This represents the azimuth angle and phase delay angle introduced during the polarization rotation of the i-th fiber. After phase-locked polarization, the above equation can be expressed as a diagonal matrix. Therefore, the coherent beam combining transmitter provided in this application embodiment can achieve stable constructive interference.

[0105] In specific implementation, the preset control algorithm can adopt the stochastic parallel gradient descent algorithm. When implementing phase-locked and bias-locked coherent beam combining based on the stochastic parallel gradient descent algorithm, the beam combining power detected by the photodetector is used as the optimization object. Positive / negative perturbation voltages are applied to the phase shifter through the control module, and the change in the evaluation function is calculated to update the control voltage of the phase shifter. The specific steps include:

[0106] Step 1: Initialize the phase control voltage of the phase shifters (each phase shift unit contains 4 phase shifters, and N phase shift units contain a total of 4N phase shifters). and gain coefficient .

[0107] Step 2: Generate a set of random positive perturbation voltages. .

[0108] Step 3: Apply positive scrambling to the phase shifter .

[0109] Step 4: Obtain the output value of the photodetector. .

[0110] Step 5: Apply negative scrambling to the phase shifter .

[0111] Step 6: Obtain the output value of the photodetector. .

[0112] Step 7, Calculate Update the phase shifter control voltage .

[0113] Step 8: Obtain the output value of the photodetector after updating the control voltage.

[0114] Step 9: Continue executing Step 2 for phase control until the required number of iterations is reached, at which point the algorithm ends.

[0115] Based on the above analysis, the implementation process of the coherent beam combining emission method provided in this application will be described in detail below with reference to specific embodiments.

[0116] like Figure 3 As shown in the figure, the implementation process of the coherent beam combining transmission method provided in this application embodiment is as follows:

[0117] Step 301: Acquire the signal light to be emitted;

[0118] Step 302: The signal light is split into two single-polarized lights, and the two single-polarized lights are split into multiple optical signals. The multiple optical signals split from the two single-polarized lights are combined in pairs to obtain multiple sets of optical signals.

[0119] Step 303: Perform phase shifting operation on each group of optical signals, and combine the phase-shifted optical signals into one output optical signal to obtain multiple output optical signals;

[0120] Step 304: Detect the combined power of the multiple output optical signals, and use the combined power as an evaluation function to apply at least one perturbation to the voltage parameters of the phase shifting operation, and remeasure the combined power until the combined power meets the preset conditions.

[0121] As an optional implementation, the voltage parameters of the phase-shifting operation are perturbed at least once, and the combined power is remeasured until the combined power meets a preset condition, including:

[0122] The combined power is used as the evaluation function of the preset control algorithm, and iteration is performed until the evaluation function converges to meet the preset conditions or the number of iterations reaches the preset number. The voltage parameters of the random perturbation phase shift operation are estimated according to the change of the evaluation function, and the gradient direction of the change of the evaluation function is estimated, and the voltage parameters are updated in the next iteration based on the gradient direction.

[0123] As an optional implementation, the voltage parameters for random perturbation phase-shifting operation include:

[0124] A disturbance voltage is generated, and the voltage parameters during the phase-shifting operation are positively and / or negatively disturbed by the disturbance voltage.

[0125] As an optional implementation, the two single-polarized light sources produce the same number of optical signal paths.

[0126] As an optional implementation, phase-shifting operations are performed on each group of optical signals, including:

[0127] Each pair of optical signals in each group is subjected to at least one phase-shifting process.

[0128] Based on the same inventive concept, such as Figure 4 As shown in the embodiment of this application, another coherent beam combining transmitter is also provided, the device comprising:

[0129] Receiver unit 401 is used to acquire the signal light to be transmitted;

[0130] Processing unit 402 is used to split the signal light into two single-polarized lights, split the two single-polarized lights into multiple optical signals, and combine the multiple optical signals split from the two single-polarized lights in pairs to obtain multiple sets of optical signals.

[0131] Phase-shifting unit 403 is used to perform phase-shifting operations on each group of optical signals and combine the phase-shifted optical signals into one output optical signal to obtain multiple output optical signals.

[0132] The control unit 404 is used to detect the combined power of the multiple output optical signals, and use the combined power as an evaluation function to apply at least one perturbation to the voltage parameters of the phase shifting operation, and re-measure the combined power until the combined power meets the preset conditions.

[0133] As an optional implementation, the control unit 404 is specifically used for:

[0134] The combined power is used as the evaluation function of the preset control algorithm, and iteration is performed until the evaluation function converges to meet the preset conditions or the number of iterations reaches the preset number. The voltage parameters of the random perturbation phase shift operation are estimated according to the change of the evaluation function, and the gradient direction of the change of the evaluation function is estimated, and the voltage parameters are updated in the next iteration based on the gradient direction.

[0135] As an optional implementation, the control unit 404 is specifically used for:

[0136] A disturbance voltage is generated, and the voltage parameters during the phase-shifting operation are positively and / or negatively disturbed by the disturbance voltage.

[0137] As an optional implementation, the two single-polarized light sources produce the same number of optical signal paths.

[0138] As an optional implementation, the phase shifting unit 403 is specifically used for:

[0139] Each pair of optical signals in each group is subjected to at least one phase-shifting process.

[0140] Based on the same inventive concept, such as Figure 5 As shown in the illustration, this application also provides a coherent beam combining transmission device, which includes a processor 500 and a memory 501. The memory 501 is used to store programs executable by the processor 500, and the processor 500 is used to read and execute the programs in the memory 501.

[0141] Acquire the signal light to be emitted;

[0142] The signal light is split into two single-polarized beams, and each single-polarized beam is further split into multiple optical signals. The multiple optical signals split from the two single-polarized beams are then combined in pairs to obtain multiple sets of optical signals.

[0143] Each group of optical signals is phase-shifted, and the phase-shifted optical signals are combined into one output optical signal to obtain multiple output optical signals.

[0144] The combined power of the multiple output optical signals is detected and used as an evaluation function. The voltage parameters of the phase-shifting operation are perturbed at least once, and the combined power is measured again until the combined power meets the preset conditions.

[0145] As an optional implementation, the processor 500 is specifically configured to execute:

[0146] The combined power is used as the evaluation function of the preset control algorithm, and iteration is performed until the evaluation function converges to meet the preset conditions or the number of iterations reaches the preset number. The voltage parameters of the random perturbation phase shift operation are estimated according to the change of the evaluation function, and the gradient direction of the change of the evaluation function is estimated, and the voltage parameters are updated in the next iteration based on the gradient direction.

[0147] As an optional implementation, the processor 500 is specifically configured to execute:

[0148] A disturbance voltage is generated, and the voltage parameters during the phase-shifting operation are positively and / or negatively disturbed by the disturbance voltage.

[0149] As an optional implementation, the two single-polarized light sources produce the same number of optical signal paths.

[0150] As an optional implementation, the processor 500 is specifically configured to execute:

[0151] Each pair of optical signals in each group is subjected to at least one phase-shifting process.

[0152] Based on the coherent beam combining transmitter provided in the embodiments of this application, further, as... Figure 6 As shown in the figure, this application embodiment also provides an optical communication terminal 600, including: a transceiver antenna 601, a beam combiner module 602, a power supply module 603, an integrated coherent receiver 604, and a coherent beam combiner transmitter 605 provided in this application embodiment.

[0153] The coherent beam combining transmitter 605 is used to beamform the signal light to be transmitted and send the beamformed optical signal to the beam combining module 602.

[0154] The beam combining module 602 is used to coherently combine the multiple output optical signals after beamforming by the coherent beam combining transmitter 605 into a single transmitted light, and transmit it to other terminals through the transceiver antenna 601.

[0155] An integrated coherent receiver 604 is used to coherently demodulate the signal light received by the transceiver antenna 601;

[0156] The power supply module 603 is used to supply power to the transceiver antenna 601, the beam combiner module 602, the integrated coherent receiver 604, and the coherent beam combiner transmitter 605.

[0157] Based on the coherent beam combining transmitter provided in the embodiments of this application, further, as... Figure 7 As shown in the figure, this application embodiment also provides another optical communication terminal 700, including: an optical head 70, a communication processor 71 and a phased array transmitter 72, wherein the optical head 70 includes a transceiver antenna 701 and a beam combiner module 702, the communication processor 71 includes a first power module 711, a transmitting processor 712 and a receiving processor 713, and the phased array transmitter 72 includes a second power module 721, a multi-channel optical amplification module 722 and a coherent beam combiner transmitter 723 provided in this application embodiment.

[0158] In specific implementation, when the optical communication terminal 700 transmits signal light to other terminals, the coherent beam combining transmitter 723 performs beamforming on the signal light to be transmitted, and then amplifies the beam-shaped optical signal through the multi-channel optical amplification module 722 before sending it to the transmitting processor 712. The transmitting processor 712 processes the optical signal accordingly and then sends the processed optical signal to the beam combining module 702. The beam combining module 702 coherently combines the processed optical signal into one transmit light and transmits it to other terminals through the transceiver antenna 701.

[0159] When the optical communication terminal 700 receives signal light transmitted by other terminals, it receives the signal light transmitted by other terminals through the transceiver antenna 701, and sends the received signal light to the receiver processor 713 for corresponding processing. Then, the receiver processor 713 sends the processed signal light to the integrated coherent receiver (not shown in the figure) in the optical communication terminal 700, and the integrated coherent receiver performs coherent demodulation on the received signal light.

[0160] The first power module 711 supplies power to the transmitting processor 712 and the receiving processor 713, while the second power module 721 supplies power to the multi-channel optical amplification module 722 and the coherent beam combining transmitter 723. Alternatively, the transceiver antenna 701 and the beam combining module 702 can be powered by independent power supplies, or by either the first power module 711 or the second power module 721.

[0161] Based on the same inventive concept, this disclosure provides a computer storage medium comprising: computer program code, which, when executed on a computer, causes the computer to perform any of the coherent beam combining transmission methods described above. Since the principle by which the computer storage medium solves the problem is similar to that of the coherent beam combining transmission method, the implementation of the computer storage medium can be found in the implementation of the method, and repeated details will not be elaborated further.

[0162] In specific implementation, computer storage media can include: Universal Serial Bus Flash Drive (USB), portable hard drive, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, and other storage media that can store program code.

[0163] Based on the same inventive concept, this disclosure also provides a computer program product, which includes computer program code that, when executed on a computer, causes the computer to perform any of the coherent beam combining emission methods described above. Since the principle by which the above-described computer program product solves the problem is similar to that of the coherent beam combining emission method, the implementation of the above-described computer program product can be referred to the implementation of the method, and repeated details will not be elaborated further.

[0164] Computer program products may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0165] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0166] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 Devices that specify the functions in one or more boxes.

[0167] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction device, which is implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0168] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0169] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A coherent beam combining transmitter, characterized in that, The device comprises a polarization rotation beam splitter, a first optical branch, a second optical branch, a phase shifter module, a beam combination module, a photodetector, and a control module, wherein The polarization rotation beam splitter is configured to split the signal light to be emitted into two single-polarization lights, and the two single-polarization lights are input into the first optical branch and the second optical branch, respectively. The first optical branch and the second optical branch are connected to the polarization rotation beam splitter and are configured to split the received light into multiple optical signals, and the multiple optical signals output by the first optical branch and the multiple optical signals output by the second optical branch are combined two by two to obtain multiple groups of optical signals. The phase shifter module is connected to the first optical branch and the second optical branch and is configured to perform a phase shift operation on each group of optical signals. The beam combination module is connected to the phase shifter module and is configured to combine the multiple groups of optical signals output by the phase shifter module into one output optical signal to obtain multiple output optical signals. The photodetector is configured to detect the beam combination power of the multiple output optical signals output by the beam combination module and send the beam combination power to the control module. The control module is configured to take the beam combination power as an evaluation function, apply at least one disturbance to the voltage parameter of the phase shift operation, and re-measure the beam combination power until the beam combination power meets a preset condition.

2. The apparatus of claim 1, wherein, The control module is specifically configured to take the beam combination power as an evaluation function of a preset control algorithm, perform iteration until the evaluation function converges to meet a preset condition, or the iteration number reaches a preset number: randomly disturb the voltage parameter of the phase shift operation, estimate the gradient direction of the change of the evaluation function according to the change of the evaluation function, and update the voltage parameter in the next iteration based on the gradient direction.

3. The apparatus of claim 1, wherein, The phase shifter module comprises a plurality of phase shift units. The phase shifter module is specifically configured to perform at least one phase shift operation on two optical signals in each group of optical signals by using the phase shift units.

4. The apparatus of claim 3, wherein, The phase shift unit comprises a first phase shift component, a plurality of second phase shift components, and a plurality of couplers, and the couplers are connected between the first phase shift component and the second phase shift component and between adjacent second phase shift components. The first phase shift component comprises two phase shifters, and the second phase shift component comprises one or two phase shifters.

5. The apparatus of claim 1, wherein, The first optical branch and the second optical branch split the same number of optical signals.

6. The apparatus of any one of claims 1-5, wherein, The device further comprises a non-polarization maintaining optical amplifier and a beam splitter. The non-polarization maintaining optical amplifier is connected to the beam combination module and is configured to amplify the multiple output optical signals output by the beam combination module. The beam splitter is connected to the non-polarization maintaining optical amplifier and is configured to split a target optical signal from the optical signals output by the non-polarization maintaining optical amplifier and send the target optical signal to the photodetector.

7. A coherent beam combining transmitting method applied to the coherent beam combining transmitting device of any one of claims 1-6, characterized in that, The method comprises: acquiring signal light to be emitted; splitting the signal light into two single-polarization lights, splitting the two single-polarization lights into multiple optical signals, and combining the multiple optical signals split by the two single-polarization lights two by two to obtain multiple groups of optical signals; The phase shift operation is performed on each group of optical signals, and the phase-shifted optical signals are combined into one output optical signal to obtain multiple output optical signals; The combined power of the multiple output optical signals is detected, and the combined power is used as an evaluation function to apply at least one disturbance to the voltage parameter of the phase shift operation, and the combined power is re-measured until the combined power meets the preset condition.

8. The method of claim 7, wherein, The at least one disturbance to the voltage parameter of the phase shift operation and the re-measurement of the combined power until the combined power meets the preset condition include: The combined power is used as an evaluation function of a preset control algorithm, and iteration is performed until the evaluation function converges to meet the preset condition or the number of iterations reaches a preset number: randomly disturbing the voltage parameter of the phase shift operation, estimating the gradient direction of the change of the evaluation function according to the change of the evaluation function, and updating the voltage parameter in the next iteration based on the gradient direction.

9. The method of claim 8, wherein, The random disturbance to the voltage parameter of the phase shift operation includes: A disturbance voltage is generated, and the disturbance voltage is used to positively and / or negatively disturb the voltage parameter of the phase shift operation.

10. The method of claim 7, wherein, The two single-polarization optical signals are split into the same number of optical signals.

11. The method according to any one of claims 7-10, characterized in that, The phase shift operation on each group of optical signals includes: At least one phase shift processing is performed on two optical signals in each group of optical signals.

12. An optical communication terminal, characterized by It includes: Transmitting and receiving antennas, a combining module, a power supply module, an integrated coherent receiver, and a coherent combining transmitting device as claimed in any one of claims 1-6; The coherent combining transmitting device is configured to perform beamforming on the signal light to be transmitted, and transmit the beamformed optical signal to the combining module; The combining module is configured to coherently combine the multiple output optical signals from the coherent combining transmitting device into one transmitting light, and transmit the transmitting light to other terminals through the transmitting and receiving antennas; The integrated coherent receiver is configured to coherently demodulate the signal light received by the transmitting and receiving antennas; The power supply module is configured to supply power to the transmitting and receiving antennas, the combining module, the integrated coherent receiver, and the coherent combining transmitting device.

13. An optical communication terminal, characterized by The terminal includes an optical head, a communication processor, and a phased array transmitting device, wherein the optical head includes transmitting and receiving antennas and a combining module, the communication processor includes a first power supply module, a transmitting processor, and a receiving processor, and the phased array transmitting device includes a second power supply module, a multiple optical amplification module, and a coherent combining transmitting device as claimed in any one of claims 1-6.

14. A coherent beam combining transmitter apparatus, characterized by, The device includes a processor and a memory for storing programs executable by the processor, and the processor is configured to read the programs in the memory and perform the steps of the method of any one of claims 7-11.

15. A computer storage medium having stored thereon a computer program, characterized in that The program is executed by the processor to implement the steps of the method of any one of claims 7-11.

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