High-speed reliable communication device and method based on microwave photon technology

Abstract

The invention discloses a high-speed reliable communication device and method based on a microwave photon technology, and belongs to the technical field of microwave photons and optical communication, and the high-speed reliable communication device comprises a microwave photon signal transmitter and a microwave photon signal receiver, the microwave photon signal transmitter comprises an analog-to-digital conversion module, a data compiler and a transmitting antenna; the microwave photon signal receiver comprises a receiving antenna, an electro-optical modulator, an optical amplifier, a microwave photon chip module, an optical detector and a data demodulation module. The device can meet the requirement of high-speed communication, the coded signal has the characteristic of interception resistance, and the device has the characteristics of simple structure, convenience in design and easiness in integration.

Description

Technical Field The present invention relates to the field of microwave photonics and optical communications, and more specifically, to a high-speed and reliable communication device and method based on microwave photonics technology. Background Art Microwave photonics technology is an interdisciplinary subject that transforms microwave signals into the optical domain and realizes the generation, distribution, control, and processing of signals through optical methods. Compared with traditional microwave and digital processing technologies, optical processing has a series of advantages such as broadband, high speed, parallelism, compactness, electromagnetic compatibility, and anti-interference. Optical communication technology is an organic combination of wired communication and wireless communication. The widespread application of microwave photonic technology in optical communication enables optical communication systems to achieve high robustness, integration and anti-interference. [1] The capacity of fiber-optic communication systems has increased by several orders of magnitude over the past two decades and will continue to grow at a faster rate in the foreseeable future. [2] For example, the use of high-order modulation formats can effectively improve the spectrum efficiency of optical fiber transmission and increase the total capacity of the system. High spectrum efficiency systems are usually more tolerant to chromatic dispersion and polarization mode dispersion because they occupy less bandwidth at the same bit rate. [3] In order to use high-order signals to expand bandwidth and increase speed, existing optical communication systems have extremely high requirements for back-end data processing capabilities. If some encoding operations are placed in the optical domain, the communication efficiency will be greatly improved. [4] . However, the existing technology still has the following technical problems: the current situation is difficult to adapt to the development needs of high-speed communication, the coded signal is easy to be intercepted, and the system size is large.

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[0004] Essiambre R,Foschini G,Kramer G,et al.Capacity limits of informationtransport in fiber-optic networks[J].Physical review letters,2008,101:163901. Summary of the invention The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-speed and reliable communication device and method based on microwave photonic technology. Through the nonlinear transformation in the microwave photonic chip, the input optical signal is encoded. Such a process can be completed in an instant and is not limited by bandwidth. It can meet the needs of high-speed communication, and the encoded signal has the characteristics of anti-interception, simple structure, convenient design, and easy integration. The object of the present invention is achieved through the following solutions: A high-speed and reliable communication device based on microwave photon technology, comprising: Microwave photon signal transmitter and microwave photon signal receiver; The microwave photon signal transmitter includes an analog-to-digital conversion module, a data compiler and a transmitting antenna. The signal transmitter performs analog-to-digital conversion and encoding on the transmitting signal so that the transmitting signal includes valid information and redundant information, and sends the compiled transmitting signal through the transmitting antenna; The microwave photon signal receiver comprises a receiving antenna, an electro-optic modulator, an optical amplifier, a microwave photon chip module, a photodetector and a data demodulation module; the compiled transmission signal is received by the receiving antenna, and the information is modulated onto light through the electro-optic modulator; the modulated signal is amplified by the optical amplifier and then enters the microwave photon chip module to remove redundant information and restore the original code type; an optical nonlinear structure and a silicon-based waveguide are arranged in the microwave photon chip module, and are connected to the system through an end-face coupled optical fiber. Furthermore, the optical nonlinear structure includes a nonlinear optical ring mirror and a Mach-Zehnder interferometer. Furthermore, the silicon-based waveguide includes a ridge-type silicon-based waveguide with silicon dioxide as a substrate. Furthermore, it also includes a first A / D converter, which is connected to the output port of the data compiler to convert it into a signal that can be transmitted through the antenna. Furthermore, it also includes a second A / D converter, which is connected to the radio frequency input end of the electro-optical modulator. A high-speed and reliable communication method based on microwave photonic technology, based on the device as described in any one of the above, comprises the following steps: S1, the original information is encoded by the data compiler in the transmitter. The code type of the original information is a1, a2, a3, a4... After the data compiler, the code type of the original information is changed to b1, b2, b3, b4..., and the corresponding relationship is a1→b1, a2→b2, a3→b3, a4→b4. The code types after these original code types are transformed are valid information; at the same time, in the sequence composed of valid information, redundant information with code types of c1, c2, c3, c4... is randomly inserted to form the final transmission signal together with the valid information; S2, the compiled transmission signal is received by the receiving antenna of the receiver, and the information is modulated onto light by external modulation. The modulated signal is amplified by the optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code pattern. The microwave photonic chip inputs light into it through end-face coupling. A waveguide with a nonlinear structure is arranged inside the chip, and the nonlinear coefficient can be controlled by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. S3, the optical detector converts the information that has been restored to code by the microwave photonic chip into an electrical signal, and then restores the information to a sequence in the data demodulator. A method for designing a high-speed and reliable communication device based on microwave photonic technology, based on the high-speed and reliable communication device based on microwave photonic technology as described in any one of the above items, comprises the following steps: Determine the code positions and quantity that need to be converted, and then determine the design parameters inside the chip based on the code information and the characteristics of the nonlinear structure inside the chip; the code length is proportional to the effective mode field area A of the waveguide cross section eff , and is also inversely proportional to the waveguide length L. The parameters are obtained through calculation, and the gain coefficient of the optical amplifier in front of the microwave photonic chip is determined at the same time, so that the input optical signal power is aligned with the nonlinear function curve of the microwave photonic chip. The beneficial effects of the present invention include: The present invention performs encoding operation on input optical signals through nonlinear transformation in microwave photonic chips. Such a process can be completed in an instant and is not limited by bandwidth. It can meet the needs of high-speed communication, and the encoded signal has the characteristics of anti-interception. The corresponding device can realize integrated design in the optical communication system, which is convenient for system miniaturization. At the same time, the corresponding device has strong communication reliability and high safety factor during signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor. Figure 1 This is a schematic diagram of a high-speed reliable communication device based on microwave photonic technology according to an embodiment of the present invention; Figure 2 A schematic diagram of the basic structure of a microwave photonic chip according to an embodiment of the present invention; Figure 3 Schematic diagram of a waveguide of a microwave photonic chip according to an embodiment of the present invention; Figure 4 is a code conversion function curve of the microwave photonic chip according to an embodiment of the present invention; Figure 5 The figure is a complete schematic diagram of the code type conversion process according to the embodiment of the present invention. DETAILED DESCRIPTION All features disclosed in all embodiments in this specification, or steps in all methods or processes implicitly disclosed, except for mutually exclusive features and / or steps, can be combined and / or expanded or replaced in any manner. The specific implementation process of the present invention is as follows: In a preferred embodiment, the present invention provides a high-speed and reliable communication device based on microwave photonic technology. The input optical signal is encoded through nonlinear transformation in the microwave photonic chip. Such a process can be completed in an instant and is not limited by bandwidth. It can meet the needs of high-speed communication, and the encoded signal has the characteristic of anti-interception. The original information is encoded in the transmitter through the data compiler. The code type of the original information is a1, a2, a3, a4... After the data compiler, the code type of the original information is changed to b1, b2, b3, b4... The corresponding relationship is a1→b1, a2→b2, a3→b3, a4→b4. The code types after these original code types are transformed are valid information. At the same time, in the sequence composed of valid information, redundant information with code types of c1, c2, c3, c4... is randomly inserted, and together with the valid information, it forms the final transmission signal. There is a D / A converter at the output port of the data compiler to convert it into a signal that can be transmitted through the antenna. like Figure 1 As shown in the figure, the compiled transmission signal is received by the receiving antenna of the receiver, and the information is modulated onto light by external modulation. There is an A / D converter in front of the RF input of the electro-optical modulator. The modulated signal is amplified to the appropriate power by the optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code type. The microwave photonic chip has amplitude requirements for the input signal, so an optical amplifier must be used to adjust the signal amplitude to the appropriate size to match the design requirements of the microwave photonic chip. Microwave photonic chips input light into them through end-face coupling. The chip is composed of Mach-Zehnder interference structure and nonlinear optical ring mirror. Figure 2 The waveguide shapes that make up these nonlinear structures are shown in Figure 3 As shown in Figure 1, such a structure can control the nonlinear coefficient by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. The input and output code characteristic function curve of the microwave photonic chip, that is, the optical signal in the input chip is output as a new code after nonlinear transformation, similar to Figure 4 The code characteristics of the optical signal input into the chip are b1, c1, b2, c2, b3, c3, b4, c4... When output, the c1, c2, c3, c4... codes will become 0, that is, they will be erased, and the corresponding transformation relationship of the remaining codes is b1→a1, b2→a2, b3→a3, b4→a4, that is, the input code is restored to the code a1, 0, a2, 0, a3, 0, a4... In this embodiment, if Figure 1 As shown, the photodetector converts the information that has been restored to a code type by the microwave photonic chip into an electrical signal, and then restores the information to a sequence in the data demodulator. Specifically, the bits occupied by 0 in the restored data sequence a1, 0, a2, 0, a3, 0, a4, 0... are removed, and the information is restored to the original information a1, a2, a3, a4... Figure 1It is a high-speed and reliable communication device based on microwave photonic technology. It consists of two parts: a microwave photonic signal transmitter and a signal receiver. The compiled transmission signal is received by the receiver's receiving antenna, and the information is modulated onto light through external modulation. There is an A / D converter in front of the RF input of the electro-optical modulator. The modulated signal is amplified to a suitable power by an optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code. The microwave photonic chip has amplitude requirements for the input signal, so an optical amplifier must be used to adjust the signal amplitude to a suitable size to match the design requirements of the microwave photonic chip. Figure 2 The schematic diagram of the basic structure of a microwave photonic chip is shown in Figure 1. The microwave photonic chip inputs light into it through end-face coupling. The chip is composed of Mach-Zehnder interference structure and nonlinear optical ring mirror. First, determine the code bits and number that need to be converted, and then determine the design parameters inside the chip based on the code information and the characteristics of the nonlinear structure inside the chip. The code length is proportional to the effective mode field area A of the waveguide cross section. eff , and is also inversely proportional to the waveguide length L. The appropriate parameters can be obtained through calculation, and the gain coefficient of the optical amplifier in front of the microwave photonic chip can also be determined, so that the input optical signal power is aligned with the nonlinear function curve of the microwave photonic chip. Figure 3 The shape of the waveguide that forms the nonlinear structure inside the microwave photonic chip. Such a structure can control the nonlinear coefficient by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. Figure 4 is the input-output code characteristic function curve of the microwave photonic chip embodiment, that is, the optical signal input into the chip is output as a new code after nonlinear transformation, Figure 4 The code characteristic is that the input code types can be 1, 2, 3, 4, 5, 6, 7, 8 respectively. When output, the code types 2, 4, 6, 8 will become 0 or be erased, and the corresponding transformation relationship of the remaining code types is 1→1, 3→2, 5→3, 7→4, that is, the input code type is restored to the code type 1, 0, 2, 0, 3, 0, 4. In other embodiments of the present invention, a PAM-4 signal is taken as an example to construct a high-speed reliable communication device based on microwave photonic technology. Figure 1 As shown, the high-speed reliable communication device based on microwave photonic technology of this embodiment includes two major parts: a signal transmitter and a receiver. Among them, Figure 1 As shown in the figure, the signal transmitter is mainly composed of a data compiler and a transmitting antenna. The signal receiver is mainly composed of a receiving antenna, a light source, an electro-optic modulator, an optical amplifier, a microwave photonic chip, a photodetector, and a data demodulator. Figure 1A detailed description of the device: The original information is encoded in the transmitter through the data compiler. Here, the fourth-order pulse amplitude modulation PAM-4 signal is taken as an example. The code pattern of the original information is 1, 2, 3, 4. After the data compiler, the code pattern of the original information is changed to 1, 3, 5, 7. The corresponding relationship is 1→1, 2→3, 3→5, 4→7. The code patterns after these original code patterns are valid information. At the same time, in the sequence composed of valid information, redundant information with code patterns of 2, 4, 6, 8 is randomly inserted, and together with the valid information, it forms the final transmission signal. There is a D / A converter at the output port of the data compiler to convert it into a signal that can be transmitted through the antenna. like Figure 1 As shown in the figure, the compiled transmission signal is received by the receiving antenna of the receiver, and the information is modulated onto light by external modulation. There is an A / D converter in front of the RF input of the electro-optical modulator. The modulated signal is amplified to the appropriate power by the optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code type. The microwave photonic chip has amplitude requirements for the input signal, so an optical amplifier must be used to adjust the signal amplitude to the appropriate size to match the design requirements of the microwave photonic chip. Microwave photonic chips input light into them through end-face coupling. The chip is composed of Mach-Zehnder interference structure and nonlinear optical ring mirror. Figure 2 The waveguide shapes that make up these nonlinear structures are shown in Figure 3 As shown in , such a structure can control the nonlinear coefficient by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. Figure 4 The figure shows the input and output code characteristic function curve of the microwave photonic chip, that is, the optical signal in the input chip is output as a new code after nonlinear transformation. Figure 4 The code type characteristic is that the input code types can be 1, 2, 3, 4, 5, 6, 7, 8 respectively. When output, the code types 2, 4, 6, 8 will become 0 or be erased, and the corresponding transformation relationships of the remaining code types are 1→1, 3→2, 5→3, 7→4, that is, the input code type is restored to the code type 1, 0, 2, 0, 3, 0, 4. In this embodiment, if Figure 1 As shown in FIG. 1 , the photodetector converts the information that has been restored by the microwave photonic chip into an electrical signal, and then the information is sequenced in the data demodulator. Specifically, the bits occupied by 0 in the restored data sequence 1,0,2,0,3,0,4,0 are removed to restore the information to the original information. The whole process is as follows Figure 5 shown. As another embodiment of the present invention, a design method for a microwave photonic chip is described: first, the code bits and the number of code bits that need to be converted are determined, and then the design parameters inside the chip are determined based on the code information and the characteristics of the nonlinear structure inside the chip. The code length is proportional to the effective mode field area A of the waveguide cross section. eff , and is also inversely proportional to the waveguide length L. The appropriate parameters can be obtained through calculation, and the gain coefficient of the optical amplifier in front of the microwave photonic chip can also be determined, so that the input optical signal power is aligned with the nonlinear function curve of the microwave photonic chip. The present invention is not limited to the above-mentioned specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed. If non-substantial changes or improvements made by those skilled in the art without departing from the spirit of the present invention should fall within the scope of protection of the claims of the present invention. It should be noted that within the scope of protection defined in the claims of the present invention, the following embodiments can be combined and / or expanded or replaced in any logical way from the above specific implementation methods, such as disclosed technical principles, disclosed technical features or implicitly disclosed technical features. Example 1 A high-speed and reliable communication device based on microwave photon technology, comprising: Microwave photon signal transmitter and microwave photon signal receiver; The microwave photon signal transmitter includes an analog-to-digital conversion module, a data compiler and a transmitting antenna. The signal transmitter performs analog-to-digital conversion and encoding on the transmitting signal so that the transmitting signal includes valid information and redundant information, and sends the compiled transmitting signal through the transmitting antenna; The microwave photon signal receiver comprises a receiving antenna, an electro-optic modulator, an optical amplifier, a microwave photon chip module, a photodetector and a data demodulation module; the compiled transmission signal is received by the receiving antenna, and the information is modulated onto light through the electro-optic modulator; the modulated signal is amplified by the optical amplifier and then enters the microwave photon chip module to remove redundant information and restore the original code type; an optical nonlinear structure and a silicon-based waveguide are arranged in the microwave photon chip module, and are connected to the system through an end-face coupled optical fiber. Example 2 Based on Example 1, the optical nonlinear structure includes a nonlinear optical ring mirror and a Mach-Zehnder interferometer. Example 3 Based on Example 1, the silicon-based waveguide includes a ridge-type silicon-based waveguide with silicon dioxide as a substrate. Example 4 Based on the embodiment 1, it further includes a first A / D converter, which is connected to the output port of the data compiler to convert it into a signal that can be transmitted through the antenna. Example 5 Based on the embodiment 1, it further includes a second A / D converter, wherein the second A / D converter is connected to the radio frequency input end of the electro-optic modulator. Example 6 A high-speed reliable communication method based on microwave photonic technology, based on the device described in any one of Embodiments 1 to 4, comprises the following steps: S1, the original information is encoded by the data compiler in the transmitter. The code type of the original information is a1, a2, a3, a4... After the data compiler, the code type of the original information is changed to b1, b2, b3, b4..., and the corresponding relationship is a1→b1, a2→b2, a3→b3, a4→b4. The code types after these original code types are transformed are valid information; at the same time, in the sequence composed of valid information, redundant information with code types of c1, c2, c3, c4... is randomly inserted to form the final transmission signal together with the valid information; S2, the compiled transmission signal is received by the receiving antenna of the receiver, and the information is modulated onto light by external modulation. The modulated signal is amplified by the optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code pattern. The microwave photonic chip inputs light into it through end-face coupling. A waveguide with a nonlinear structure is arranged inside the chip, and the nonlinear coefficient can be controlled by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. S3, the optical detector converts the information that has been restored to code by the microwave photonic chip into an electrical signal, and then restores the information to a sequence in the data demodulator. Example 7 A method for designing a high-speed and reliable communication device based on microwave photonic technology, based on the high-speed and reliable communication device based on microwave photonic technology described in any one of Embodiments 1 to 5, comprises the following steps: Determine the code positions and quantity that need to be converted, and then determine the design parameters inside the chip based on the code information and the characteristics of the nonlinear structure inside the chip; the code length is proportional to the effective mode field area A of the waveguide cross section eff , and is also inversely proportional to the waveguide length L. The parameters are obtained through calculation, and the gain coefficient of the optical amplifier in front of the microwave photonic chip is determined at the same time, so that the input optical signal power is aligned with the nonlinear function curve of the microwave photonic chip. The units involved in the embodiments of the present invention may be implemented by software or hardware, and the units described may also be arranged in a processor. The names of these units do not, in some cases, limit the units themselves. According to one aspect of an embodiment of the present invention, a computer program product or a computer program is provided, the computer program product or the computer program includes a computer instruction, and the computer instruction is stored in a computer-readable storage medium. A processor of a computer device reads the computer instruction from the computer-readable storage medium, and the processor executes the computer instruction, so that the computer device executes the method provided in the above various optional implementations. As another aspect, an embodiment of the present invention further provides a computer-readable medium, which may be included in the electronic device described in the above embodiment; or may exist independently without being assembled into the electronic device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by an electronic device, the electronic device implements the method described in the above embodiment.

Claims

1. A high-speed and reliable communication device based on microwave photonic technology, characterized in that: include: Microwave photon signal transmitter and microwave photon signal receiver; The microwave photon signal transmitter includes an analog-to-digital conversion module, a data compiler and a transmitting antenna. The signal transmitter performs analog-to-digital conversion and encoding on the transmitting signal so that the transmitting signal includes valid information and redundant information, and sends the compiled transmitting signal through the transmitting antenna; The microwave photon signal receiver comprises a receiving antenna, an electro-optic modulator, an optical amplifier, a microwave photon chip module, a photodetector and a data demodulation module; the compiled transmission signal is received by the receiving antenna, and the information is modulated onto light through the electro-optic modulator; the modulated signal is amplified by the optical amplifier and then enters the microwave photon chip module to remove redundant information and restore the original code type; an optical nonlinear structure and a silicon-based waveguide are arranged in the microwave photon chip module, and are connected to the system through an end-face coupled optical fiber.

2. The high-speed and reliable communication device based on microwave photonic technology according to claim 1, characterized in that: The optical nonlinear structure includes a nonlinear optical ring mirror and a Mach-Zehnder interferometer.

3. The high-speed and reliable communication device based on microwave photonic technology according to claim 1, characterized in that: The silicon-based waveguide includes a ridge-type silicon-based waveguide with silicon dioxide as a substrate.

4. The high-speed and reliable communication device based on microwave photonic technology according to claim 1, characterized in that: It also includes a first A / D converter, which is connected to the output port of the data compiler to convert the output port into a signal that can be transmitted through the antenna.

5. The high-speed and reliable communication device based on microwave photonic technology according to claim 1, characterized in that: It also includes a second A / D converter, which is connected to the radio frequency input end of the electro-optic modulator.

6. A high-speed and reliable communication method based on microwave photonic technology, characterized in that: The device according to any one of claims 1 to 4 comprises the following steps: S1, the original information is encoded by the data compiler in the transmitter. The code type of the original information is a1, a2, a3, a4... After the data compiler, the code type of the original information is changed to b1, b2, b3, b4..., and the corresponding relationship is a1→b1, a2→b2, a3→b3, a4→b4. The code types after these original code types are transformed are valid information; at the same time, in the sequence composed of valid information, redundant information with code types of c1, c2, c3, c4... is randomly inserted to form the final transmission signal together with the valid information; S2, the compiled transmission signal is received by the receiving antenna of the receiver, and the information is modulated onto light by external modulation. The modulated signal is amplified by the optical amplifier and enters the microwave photonic chip to remove redundant information and restore the original code pattern. The microwave photonic chip inputs light into it through end-face coupling. A waveguide with a nonlinear structure is arranged inside the chip, and the nonlinear coefficient can be controlled by designing the cross-sectional size, thereby obtaining the required nonlinear function curve. S3, the optical detector converts the information that has been restored to code by the microwave photonic chip into an electrical signal, and then restores the information to a sequence in the data demodulator.

7. A design method for a high-speed and reliable communication device based on microwave photonic technology, characterized in that: A high-speed reliable communication device based on microwave photonic technology according to any one of claims 1 to 5, comprising the following steps: Determine the code positions and quantity that need to be converted, and then determine the design parameters inside the chip based on the code information and the characteristics of the nonlinear structure inside the chip; the code length is proportional to the effective mode field area A of the waveguide cross section eff , and is also inversely proportional to the waveguide length L. The parameters are obtained through calculation, and the gain coefficient of the optical amplifier in front of the microwave photonic chip is determined at the same time, so that the input optical signal power is aligned with the nonlinear function curve of the microwave photonic chip.

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