Machine-solid interconnection laser and quantum communication general conversion method

Abstract

According to the universal conversion method for machine-solid interconnection laser and quantum communication, wavelength conversion of laser communication or quantum communication signals with different working wavelengths is realized by utilizing spontaneous frequency down-conversion in a second-order nonlinear crystal or a spontaneous four-wave mixing effect in a third-order nonlinear medium; working mode conversion of laser communication and quantum communication is realized by controlling a gain coefficient and regulating and controlling a phase matching condition, and heterogeneous channel intercommunication and interconnection between physical signals is realized.

Description

Technical Field

[0001] The present invention belongs to the interdisciplinary field of laser communication, quantum communication and nonlinear optics, and specifically refers to a method for realizing signal wavelength conversion based on optical nonlinearity, supporting two different communication signals, laser communication and quantum communication, and realizing physical intercommunication of various devices such as optical fiber communication, free space communication and optical relay, and especially relates to a universal conversion method for machine-solid interconnected laser and quantum communication. Background Art

[0002] Optical fiber communication has the advantages of large transmission bandwidth and strong stability, and is the main transmission means of existing communication networks. Laser communication has many advantages such as strong collimation, large bandwidth, and anti-electromagnetic interference. It can be used as an important supplement to free space communication and provide communication services for multiple users within the line of sight. Considering the transmission loss of optical fiber, optical fiber communication mainly works in the 1550nm band; considering the transmission loss of free space, laser communication mainly works in the 810nm band; considering the reduction of dependence on precise tracking and aiming systems, ultraviolet bands can also be used for laser communication, and non-coaxial reception of signals can be achieved through atmospheric scattering; in addition, considering factors such as eliminating background interference from sunlight, near-infrared bands and mid-infrared bands can also be used for laser communication. On the other hand, quantum communication is based on the basic characteristics of quantum mechanics such as Heisenberg's uncertainty principle, quantum indivisibility principle, and quantum non-cloning principle. It can resist eavesdropping attacks at the channel level and is a new type of secure communication method. The transmission carriers of quantum communication, optical fiber communication, and laser communication are all light fields. The difference is that quantum communication usually uses light fields of single-photon power levels for signal transmission, while single pulse signals of laser communication usually include more than tens of thousands of photons.

[0003] One problem faced by both laser communication and quantum communication is channel switching. The usual approach is to use photodetectors or single-photon detectors to receive optical fiber (fixed) or free space (mobile) laser communication or quantum communication signals, extract the information, and then drive the laser light source or single-photon light source to modulate and output free space (mobile) or optical fiber (fixed) laser communication or quantum communication signals. The above-mentioned "plaintext information landing" method not only has security risks, but also greatly reduces the system operation efficiency. Summary of the invention

[0004] In view of the above-mentioned defects, the technical problem to be solved by the present invention is how to realize the mutual conversion of communication signals between different bands of optical fiber and different bands of free-space laser communication without dropping information.

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a universal conversion method for machine-solid interconnected laser and quantum communications, which utilizes the spontaneous frequency down-conversion in second-order nonlinear crystals or the spontaneous four-wave mixing effect in third-order nonlinear media to copy the input laser communication signal or quantum communication signal from a carrier wave of one wavelength to a carrier wave of another wavelength, retaining its information modulated in terms of polarization, phase, arrival time, intensity, etc., to achieve "information-free" communication signal conversion between different bands of optical fiber and different bands of free-space laser communications.

[0006] In order to achieve the above-mentioned effects, the universal conversion method for machine-solid interconnected laser and quantum communication provided by the present invention respectively measures the average power and working wavelength of the input signal pre-guide signal, clarifies the signal type and output wavelength to be converted, and utilizes the spontaneous frequency down-conversion in the second-order nonlinear crystal or the spontaneous four-wave mixing effect in the third-order nonlinear medium to realize the wavelength conversion of laser communication or quantum communication signals with different working wavelengths. According to the communication signal type identification result, the nonlinear wavelength conversion system parameters are adjusted, and the pump wavelength and gain coefficient are adjusted to meet the conversion conditions, thereby finally realizing the physical interconnection of machine-solid interconnected laser and quantum communication.

[0007] Preferably, the above method specifically comprises the following steps:

[0008] S101, identifying the type of communication signal, measuring the average power and working wavelength of the input signal front pilot signal respectively, and clarifying the signal type and output wavelength to be converted;

[0009] S102. According to the communication signal type identification result, the nonlinear wavelength conversion system parameters are adjusted, and the pump wavelength and gain coefficient are adjusted to meet the conversion conditions, thereby finally realizing the physical interconnection between machine-solid interconnection laser and quantum communication.

[0010] Preferably, the average power and the operating wavelength of the input signal front pilot signal are measured respectively by an optical power meter and a spectrometer.

[0011] Preferably, the working mode conversion between laser communication and quantum communication is achieved by controlling the gain coefficient and regulating the phase matching condition.

[0012] Preferably, the above method specifically includes:

[0013] S201, respectively inputting a free-space laser communication signal, a free-space quantum communication signal, an optical fiber communication signal, and an optical fiber quantum communication signal, and uniformly coupling them into the optical pigtail of the physical interface;

[0014] S202, before the input signal is converted into a wavelength, a pilot signal of all 1s is compiled, a power meter is used to determine the signal power and analyze the signal wavelength, and the input signal type is determined by combining the signal wavelength and the signal power;

[0015] S203, the physical interface determines the output signal type of the free space laser communication signal, the free space quantum communication signal, the optical fiber communication signal, and the optical fiber quantum communication signal;

[0016] S204, the pump source adjusts the driving parameters according to the input signal and the output signal type to achieve signal wavelength conversion;

[0017] When the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode, and the plaintext information modulated on the polarization, phase, arrival time, and power degrees of freedom is converted to a new wavelength. When both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, and the quantum states modulated on the polarization, phase, arrival time, power and other degrees of freedom are converted to a new wavelength. When the physical interface uses a degenerate third-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to (A+B) / 2.

[0018] Preferably, in the above S204, when the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, the pump wavelength is tuned to A+B, and when both the input and output signals are laser communication signals, the pump source operates in a high-power mode. At this time, the gain coefficient is relatively large, and signal wavelength conversion at the strong light level can be achieved.

[0019] Preferably, in the above S204, when both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, at which time the gain coefficient is small, and signal wavelength conversion at the single-photon level can be achieved.

[0020] Preferably, when the input signal is a laser communication signal and the output signal is a quantum communication signal, the pump power is attenuated to a single photon level, and the pump source in the nonlinear effect is generated by the laser communication signal.

[0021] Preferably, when the input signal is a quantum communication signal and the output signal is a laser communication signal, the pump power is increased until the stimulated nonlinear effect is strong enough to amplify the quantum communication signal parameter at the single-photon level into a laser communication signal.

[0022] The present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the above method is implemented.

[0023] Compared with the prior art, the present invention achieves the following technical effects:

[0024] Firstly, the present invention proposes the concept of physical interface, which mainly realizes the mutual conversion of signals of different channels, different wavelengths and different systems through various optical nonlinear effects without signal detection, demodulation and modulation regeneration. For laser communication systems, it can improve the interconnection efficiency of free space laser communication systems and optical fiber communication systems.

[0025] Secondly, the physical interface proposed by the present invention is particularly suitable for connecting free-space quantum communication systems and optical fiber quantum communication systems, and can enable signals to switch channels without "information falling to the ground", thereby reducing the risk of leakage caused by information detection-regeneration;

[0026] Finally, the method proposed in the present invention can also support the mutual conversion of some quantum communication-laser communication signals, which has important promotion and application value for the integration of quantum communication systems into classical communication networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of an embodiment of the universal conversion method for machine-solid interconnected laser and quantum communication of the present invention is shown;

[0029] Figure 2 A schematic diagram of another embodiment of the universal conversion method of machine-solid interconnected laser and quantum communication of the present invention is shown;

[0030] Figure 3 A schematic diagram of another embodiment of the universal conversion method for machine-solid interconnected laser and quantum communication of the present invention is shown. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0033] The present invention provides an embodiment of a universal conversion method for machine-solid interconnected laser and quantum communication, which utilizes spontaneous frequency down-conversion in a second-order nonlinear crystal or spontaneous four-wave mixing effect in a third-order nonlinear medium to achieve wavelength conversion of laser communication or quantum communication signals with different working wavelengths, and achieves working mode conversion of laser communication and quantum communication by controlling gain coefficients and regulating phase matching conditions, thereby achieving heterogeneous channel interconnection between physical signals and physical signals.

[0034] In some embodiments, quantum communication signals support the transmission of quantum states. The transmission process satisfies the basic principles of quantum mechanics, such as the Heisenberg uncertainty principle, the quantum indivisibility principle, and the quantum non-cloning principle. It can form a certain code rate, and can determine whether there is wiretapping based on the bit error rate analysis. It can transmit plaintext information or realize the key distribution function through post-processing. The quantum communication implementation methods include but are not limited to free space optical paths, optical fibers or semiconductor chips. The specific protocols and implementation methods of quantum communication modules are not limited. The interconnection methods of quantum communication modules with classical network devices, the connection methods with optical fiber channels and the specific control protocol interfaces are not limited.

[0035] In some embodiments, laser communication signals are based on information transmission carried out as carriers based on strong light pulses or modulated laser signals. The communicating parties establish optical communication links through precise tracking and aiming systems, or establish optical communication links with the help of scattering and reflection from the atmosphere, third-party surfaces, etc. Information is encoded in different optical degrees of freedom, including but not limited to polarization, phase, time, intensity, etc. Laser communication signals include two types of signals: optical fiber communication and free space communication. Optical fiber communication signals mainly work in the 1550nm band, and free space communication signals mainly work in the ultraviolet band, 810nm near-infrared band, 1550nm near-infrared band, mid-infrared band, etc. No clear definition is made on the coding protocol, transmission method, system structure and other technical parameters of laser communication signals.

[0036] In some embodiments, the physical interface can transfer energy from the pump wavelength to the signal wavelength and the idle wavelength through the spontaneous nonlinear effect in the nonlinear crystal. After different modulation signals are input to the signal wavelength, the modulation characteristics will be partially or completely copied to the idle wavelength. Through the precise control of the pump wavelength, the signal wavelength and the idle wavelength can be selected on demand. Through the precise control of the pump power, the signal wavelength and the idle wavelength can be switched on demand between quantum communication signals or laser communication signals. Second-order nonlinear crystals include but are not limited to lithium niobate and silicon carbide. Third-order nonlinear crystals include but are not limited to silicon, indium gallium arsenide, silicon nitride, etc. The nonlinear effects used to achieve nonlinear wavelength conversion include but are not limited to spontaneous frequency down-conversion, spontaneous frequency up-conversion, spontaneous four-wave mixing effect, etc. All signal conversion methods that use physical methods and avoid the "signal photoelectric detection, light source modulation regeneration" process are within the scope of the claims of the present invention.

[0037] The present invention provides an embodiment of a universal conversion method for machine-solid interconnected laser and quantum communication, which respectively measures the average power and working wavelength of a pre-guide signal of an input signal, clarifies the signal type to be converted and the output wavelength, utilizes the spontaneous frequency down-conversion in a second-order nonlinear crystal or the spontaneous four-wave mixing effect in a third-order nonlinear medium, realizes the wavelength conversion of laser communication or quantum communication signals with different working wavelengths, and adjusts the parameters of the nonlinear wavelength conversion system according to the result of communication signal type identification, and adjusts the pump wavelength and gain coefficient to meet the conversion conditions, thereby finally realizing the physical interconnection of machine-solid interconnected laser and quantum communication.

[0038] like Figure 1 As shown, the present invention provides an embodiment of a universal conversion method for machine-solid interconnected laser and quantum communication, including:

[0039] S101, identifying the type of communication signal, measuring the average power and working wavelength of the input signal front pilot signal respectively, and clarifying the signal type and output wavelength to be converted;

[0040] S102. According to the communication signal type identification result, the nonlinear wavelength conversion system parameters are adjusted, and the pump wavelength and gain coefficient are adjusted to meet the conversion conditions, thereby finally realizing the physical interconnection between machine-solid interconnection laser and quantum communication.

[0041] In some embodiments, the average power and the operating wavelength of the input signal and the pilot signal are measured respectively by an optical power meter and a spectrometer.

[0042] In some embodiments, the working mode conversion between laser communication and quantum communication is achieved by controlling the gain coefficient and adjusting the phase matching condition.

[0043] like Figure 2As shown, this embodiment also provides an interface and method for universal conversion of machine-solid interconnected laser and quantum communication, specifically including:

[0044] 1. The input signals include four types, namely free-space laser communication signals, free-space quantum communication signals, optical fiber communication signals, and optical fiber quantum communication signals, which are uniformly coupled to the optical pigtail of the physical interface;

[0045] 2. Before the input signal is converted into wavelength, it is necessary to compile a pilot signal of all 1s, use a power meter to determine the signal power, use a spectrometer to analyze the signal wavelength, and use the signal wavelength and signal power to determine the input signal type;

[0046] 3. The physical interface determines the output signal type, which also mainly includes four types, namely free space laser communication signal, free space quantum communication signal, optical fiber communication signal, and optical fiber quantum communication signal;

[0047] 4. The pump source adjusts the driving parameters according to the input signal and output signal types to achieve signal wavelength conversion. When the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode, at which the gain coefficient is large, and the signal wavelength conversion at the strong light level can be achieved. The plaintext information modulated in the polarization, phase, arrival time, and power degrees of freedom is converted to a new wavelength. When both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, at which the gain coefficient is small, and the signal wavelength conversion at the single-photon level can be achieved. The quantum state modulated in the polarization, phase, arrival time, power and other degrees of freedom is converted to a new wavelength; when the physical interface uses a degenerate third-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to (A+B) / 2.

[0048] 5. It should be noted that the physical interface can only realize laser-to-laser signal conversion and quantum-to-quantum signal conversion, and cannot 100% switch between laser communication and quantum communication signals through purely physical means. Through some special methods, it can be applied to some special signal conversion types. For example, when the input signal is a laser communication signal and the output signal is a quantum communication signal, the pump power can be attenuated to the single-photon level. At this time, the pump source in the nonlinear effect is generated by the laser communication signal; when the input signal is a quantum communication signal and the output signal is a laser communication signal, the pump power can be increased until the stimulated nonlinear effect is strong enough to amplify the quantum communication signal parameter at the single-photon level into a laser communication signal, etc.

[0049] like Figure 3 As shown, this embodiment shows an embodiment of a universal conversion method for machine-solid interconnected laser and quantum communication, including:

[0050] S201, respectively inputting a free-space laser communication signal, a free-space quantum communication signal, an optical fiber communication signal, and an optical fiber quantum communication signal, and uniformly coupling them into the optical pigtail of the physical interface;

[0051] S202, before the input signal is converted into a wavelength, a pilot signal of all 1s is compiled, a power meter is used to determine the signal power and analyze the signal wavelength, and the input signal type is determined by combining the signal wavelength and the signal power;

[0052] S203, the physical interface determines the output signal type of the free space laser communication signal, the free space quantum communication signal, the optical fiber communication signal, and the optical fiber quantum communication signal;

[0053] S204, the pump source adjusts the driving parameters according to the input signal and the output signal type to achieve signal wavelength conversion;

[0054] When the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode, and the plaintext information modulated on the polarization, phase, arrival time, and power degrees of freedom is converted to a new wavelength. When both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, and the quantum states modulated on the polarization, phase, arrival time, power and other degrees of freedom are converted to a new wavelength. When the physical interface uses a degenerate third-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to (A+B) / 2.

[0055] In some embodiments, the all-1 pilot signal in S202 refers to a pulse sequence in which all codes are 1, and a pilot signal in which all logical codes are 1 is an all-1 pilot signal.

[0056] In some embodiments, in S204, when the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode. At this time, the gain coefficient is large, and signal wavelength conversion at the strong light level can be achieved.

[0057] In some embodiments, when both the input and output signals are quantum communication signals in S204, the pump source operates in a high-power mode, in which case the gain coefficient is small, and signal wavelength conversion at the single-photon level can be achieved.

[0058] In some embodiments, when the input signal is a laser communication signal and the output signal is a quantum communication signal, the pump power is attenuated to the single photon level, and the pump source in the nonlinear effect is generated by the laser communication signal.

[0059] In some embodiments, when the input signal is a quantum communication signal and the output signal is a laser communication signal, the pump power is increased until the stimulated nonlinear effect is strong enough to amplify the quantum communication signal parameters at the single-photon level into a laser communication signal.

[0060] Compared with the prior art, the present invention has the following advantages:

[0061] (1) The present invention proposes a physical interface concept, which mainly realizes the mutual conversion of signals of different channels, different wavelengths, and different systems through various optical nonlinear effects without signal detection, demodulation, and modulation regeneration. For laser communication systems, it can improve the interconnection efficiency of free-space laser communication systems and optical fiber communication systems;

[0062] (2) The physical interface proposed in the present invention is particularly suitable for connecting free-space quantum communication systems and optical fiber quantum communication systems, and can enable signal channel switching without “information falling to the ground”, thereby reducing the risk of information leakage caused by information detection and regeneration;

[0063] (3) The method proposed in the present invention can also support the mutual conversion of some quantum communication-laser communication signals, which has important promotion and application value for integrating quantum communication systems into classical communication networks.

[0064] For the convenience of description, the above device is described in various units according to their functions. Of course, when implementing the present application, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0065] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1A device that provides the functions specified in a block or multiple blocks.

[0067] The present application may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules may be located in local and remote computer storage media, including storage devices.

[0068] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0069] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0070] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0071] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0072] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0073] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0074] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0075] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A universal conversion method for machine-solid interconnected laser and quantum communication, characterized in that: Measure the average power and working wavelength of the input signal's pre-guide signal respectively, clarify the signal type and output wavelength to be converted, and use the spontaneous frequency down-conversion in the second-order nonlinear crystal or the spontaneous four-wave mixing effect in the third-order nonlinear medium to realize the wavelength conversion of laser communication or quantum communication signals with different working wavelengths. According to the identification result of the communication signal type, adjust the parameters of the nonlinear wavelength conversion system, adjust the pump wavelength and gain coefficient to meet the conversion conditions, and finally realize the physical interconnection of machine-solid-state interconnection laser and quantum communication.

2. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 1 is characterized in that The method specifically comprises the following steps: S101, identifying the type of communication signal, measuring the average power and working wavelength of the input signal and the pre-guide signal, respectively, and clarifying the signal type and output wavelength to be converted; S102. According to the communication signal type identification result, the nonlinear wavelength conversion system parameters are adjusted, and the pump wavelength and gain coefficient are adjusted to meet the conversion conditions, thereby finally realizing the physical interconnection between machine-solid interconnection laser and quantum communication.

3. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 1 or 2, characterized in that: The average power and working wavelength of the input signal front guide signal are measured by an optical power meter and a spectrometer respectively.

4. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 1 is characterized in that: The working mode conversion between laser communication and quantum communication is achieved by controlling the gain coefficient and adjusting the phase matching conditions.

5. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 1 is characterized in that The method specifically comprises: S201, respectively inputting a free-space laser communication signal, a free-space quantum communication signal, an optical fiber communication signal, and an optical fiber quantum communication signal, and uniformly coupling them into the optical pigtail of the physical interface; S202, before the input signal is converted into a wavelength, a pilot signal of all 1s is compiled, a power meter is used to determine the signal power and analyze the signal wavelength, and the input signal type is determined by combining the signal wavelength and the signal power; S203, the physical interface determines the output signal type of the free space laser communication signal, the free space quantum communication signal, the optical fiber communication signal, and the optical fiber quantum communication signal; S204, the pump source adjusts driving parameters according to the input signal and the output signal type to achieve signal wavelength conversion; When the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode, and the plaintext information modulated on the polarization, phase, arrival time, and power degrees of freedom is converted to a new wavelength. When both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, and the quantum states modulated on the polarization, phase, arrival time, power and other degrees of freedom are converted to a new wavelength. When the physical interface uses a degenerate third-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, then the pump wavelength is tuned to (A+B) / 2.

6. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 5 is characterized in that: In S204, when the physical interface uses a second-order nonlinear medium, the input signal frequency is A and the output signal frequency is B, the pump wavelength is tuned to A+B. When both the input and output signals are laser communication signals, the pump source operates in a high-power mode. At this time, the gain coefficient is large, and signal wavelength conversion at the strong light level can be achieved.

7. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 5 is characterized in that: In S204, when both the input and output signals are quantum communication signals, the pump source operates in a high-power mode, at which time the gain coefficient is small, and signal wavelength conversion at the single-photon level can be achieved.

8. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 5 is characterized in that: When the input signal is a laser communication signal and the output signal is a quantum communication signal, the pump power is attenuated to the single-photon level, and the pump source in the nonlinear effect is generated by the laser communication signal.

9. The universal conversion method for machine-solid interconnected laser and quantum communication according to claim 5 is characterized in that: When the input signal is a quantum communication signal and the output signal is a laser communication signal, the pump power is increased until the stimulated nonlinear effect is strong enough to amplify the quantum communication signal parameters at the single-photon level into a laser communication signal.

10. A computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method according to any one of claims 1 to 9.

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