A radar signal high power amplification method and device based on optical microwave technology

Abstract

The present invention provides a radar signal high-power amplification method and device based on optical microwave technology, including: a seed light modulation module, used to generate a seed laser signal matching the time domain characteristics of an input radar signal; an optical power amplification module, used to perform optical power amplification on the seed laser signal, generating a high peak power laser signal matching the time domain characteristics of the input radar signal; an optical microwave module, using a high peak power laser signal matching the time domain characteristics of the input radar signal to irradiate the optical semiconductor device in the optical microwave module, generating and outputting a high peak power electrical signal having the same time domain characteristics as the input radar signal, thereby realizing high power amplification of the input radar signal. The present invention aims to give full play to the significant advantages of high-power optical microwave technology, break through the peak power limit of microwave power amplifiers in the existing radar field, and amplify the peak power of radar signals to 10 megawatts or more.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of radar signal amplification, and in particular to a method and device for high-power amplification of radar signals based on optical microwave technology. Background Art

[0002] High-power radar can be used for long-distance target detection and tracking. The power level of radar signals may directly affect its application effect, and how to achieve high peak power radar signals has become the focus of attention.

[0003] At present, people usually use three types of microwave power amplifiers based on electronic technology, namely vacuum amplifier devices, solid-state amplifier devices and microwave power modules, to increase the peak power of radar signals. Among them, the output peak power of gyrotron traveling wave tube amplifier is the highest, but it is only up to hundreds of kilowatts (10 5 The working principle of the gyrotron traveling wave tube amplifier is based on the instability of the electron cyclotron maser. The cyclotron electron beam interacts with the high-frequency microwave to convert the electron beam kinetic energy into high-frequency microwave energy, thereby achieving high-frequency microwave signal amplification. However, when the operating current of the gyrotron traveling wave tube amplifier is greater than the starting current, its absolute instability will cause self-oscillation problems, thereby limiting the output peak power of the gyrotron traveling wave tube amplifier. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention proposes a radar signal high power amplification method and device based on optical microwave technology, aiming to break through the output peak power limit of microwave power amplifiers in the radar field and amplify the peak power of radar signals to 10 megawatts (10 7 W) level and above.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] On the one hand, a radar signal high power amplification method based on optical microwave technology is proposed, comprising:

[0007] generating a seed laser signal that matches the time domain characteristics of an input radar signal;

[0008] Amplifying the optical power of the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal;

[0009] A high-peak power laser signal that matches the time domain characteristics of the input radar signal is used to irradiate the photoconductive semiconductor device in the photoconductive microwave module, so as to generate and output a high-peak power electrical signal with the same time domain characteristics as the input radar signal, thereby achieving high-power amplification of the input radar signal.

[0010] Furthermore, it also includes collecting a small part of the laser signal output by the optical power amplifier module to detect the time domain waveform of the laser signal output by the power amplifier module, so as to use the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, and obtain the optimal pre-compensation waveform data through waveform analysis and iterative correction of the adaptive ratio optimization algorithm and feed it back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal.

[0011] The similarity evaluation function is as follows:

[0012] ;

[0013] in represents the similarity deviation, Indicates the number of sampling points of the time domain waveform of the laser signal, represents the time domain waveform of the measured laser signal, Represents the target waveform. By similarity deviation The deviation between the time domain waveform of the measured laser signal and the target waveform is evaluated. The greater the deviation, the greater the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation.

[0014] On the other hand, a radar signal high-power amplification device based on optical microwave technology is provided, comprising:

[0015] A seed light modulation module, used to generate a seed laser signal that matches the time domain characteristics of the input radar signal;

[0016] An optical power amplification module, used to amplify the optical power of the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal;

[0017] The photoconductive microwave module utilizes a high-peak power laser signal that matches the time domain characteristics of the input radar signal to irradiate the photoconductive semiconductor device in the photoconductive microwave module, generates and outputs a high-peak power electrical signal with the same time domain characteristics as the input radar signal, and realizes high-power amplification of the input radar signal.

[0018] Furthermore, it also includes an optical signal detection and feedback processing module, which is used to collect a small part of the laser signal output by the optical power amplifier module to detect the time domain waveform of the laser signal output by the power amplifier module, so as to use the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, and obtain the optimal pre-compensation waveform data through waveform analysis and iterative correction of the adaptive ratio optimization algorithm and feed it back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal.

[0019] Furthermore, the seed light modulation module includes a semiconductor laser diode, an arbitrary signal generator, a high-speed electro-optical modulator and a driver thereof;

[0020] The semiconductor laser diode pigtail is fused to the optical fiber input end of the high-speed electro-optic modulator;

[0021] Connecting the signal output of any signal generator to the signal input of the high-speed electro-optic modulator driver by using a coaxial cable;

[0022] A semiconductor laser diode outputs a continuous laser, and then an arbitrary signal generator is used to output an electrical modulation signal with the same time domain characteristics as the output radar signal to drive a high-speed electro-optical modulator to modulate the continuous laser output by the semiconductor laser diode, thereby generating a seed laser signal that matches the time domain characteristics of the input radar signal.

[0023] Furthermore, the optical power amplification module is a multi-stage optical power amplification module formed by connecting more than one stage of optical power amplifiers in series.

[0024] Furthermore, the optical power amplification module increases the peak power of the seed laser signal to the megawatt level.

[0025] Furthermore, a spectrometer is provided on one side of the output end of the power amplifier module. After passing through the spectrometer, the laser signal output by the optical power amplifier module with most power is transmitted to the optical microwave module, and the laser signal output by the optical power amplifier module with a small power is transmitted to the optical signal detection and feedback processing module.

[0026] Furthermore, the optical signal detection and feedback processing module includes a high-speed photodetector, an oscilloscope and a computing unit. The high-speed photodetector and the oscilloscope are used to measure the time domain waveform of the laser signal input to the optical signal detection and feedback processing module and transmit it to the computing unit. The computing unit analyzes the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, calculates the optimal pre-compensation waveform data and sends it to the arbitrary signal generator, controls the arbitrary signal generator to output an electrical modulation signal with the same time domain characteristics as the output radar signal to drive the high-speed electro-optical modulator to modulate the continuous laser output by the semiconductor laser diode, and optimizes the time domain characteristics of the seed laser signal.

[0027] Furthermore, the photoconductive microwave module includes a photoconductive semiconductor device, a high-voltage DC constant voltage source, a current observation resistor, a load resistor and a capacitor, and these devices form a series circuit. The output laser with a megawatt peak power generated by the multi-stage power amplifier module is spatially coupled to the photoconductive semiconductor device, and a large current signal with the same time domain characteristics as the laser can be generated in the series circuit, and the signal peak power is output according to the formula P=U*I.

[0028] Compared with the prior art, the technical effects that the present invention can produce are:

[0029] The "electrical signal-optical signal-electrical signal" technical route proposed in the present invention replaces traditional electrical power amplification with optical power amplification, giving full play to the significant advantages of the high peak power limit of multi-stage optical power amplifiers and the high response speed, high withstand voltage, and high operating current of photoconductive semiconductor devices, breaking through the peak power bottleneck of microwave power amplifiers based on electronic technology, and for the first time amplifying the peak power of radar signals to the order of 10MW or above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 the structures shown in these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of a radar signal high-power amplification device based on optical microwave technology provided by an embodiment;

[0032] Figure 2 is a schematic diagram of a seed light modulation module provided by an embodiment;

[0033] Figure 3 is a schematic diagram of a multi-stage power amplification module provided by an embodiment;

[0034] Figure 4 is a schematic diagram of an optical power amplifier provided by an embodiment;

[0035] Figure 5 is a schematic diagram of an optical signal detection and feedback processing module provided by an embodiment;

[0036] Figure 6 is a schematic diagram of an optical microwave module provided by an embodiment;

[0037] Figure 7 This is an example diagram of a power amplification process for a linear frequency modulation radar signal with a peak power of 1 W according to an embodiment. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] On the one hand, a radar signal high power amplification method based on optical microwave technology is proposed, comprising:

[0040] generating a seed laser signal that matches the time domain characteristics of an input radar signal;

[0041] Amplifying the optical power of the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal;

[0042] A high-peak power laser signal that matches the time domain characteristics of the input radar signal is used to irradiate the photoconductive semiconductor device in the photoconductive microwave module, so as to generate and output a high-peak power electrical signal with the same time domain characteristics as the input radar signal, thereby achieving high-power amplification of the input radar signal.

[0043] Furthermore, it also includes collecting a small part of the laser signal output by the optical power amplifier module to detect the time domain waveform of the laser signal output by the power amplifier module, so as to use the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, and obtain the optimal pre-compensation waveform data through waveform analysis and iterative correction of the adaptive ratio optimization algorithm and feed it back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal.

[0044] The similarity evaluation function is as follows:

[0045] ;

[0046] in represents the similarity deviation, Indicates the number of sampling points of the time domain waveform of the laser signal, represents the time domain waveform of the measured laser signal, Represents the target waveform. By similarity deviation The deviation between the time domain waveform of the measured laser signal and the target waveform is evaluated. The greater the deviation, the greater the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation.

[0047] In one embodiment, an adaptive ratio optimization algorithm based on the ratio relationship between the output waveform and the input waveform is proposed to perform iterative optimization of the pre-compensation input waveform data, as follows:

[0048] ;

[0049] ;

[0050] ;

[0051] ;

[0052] in, represents the number of iterative optimizations, Respectively represent sequence sequence Iterations of pre-compensated input waveform data, Indicates The output waveform obtained by iteration. Indicates The adaptive ratio coefficient used in the iteration, where It is used to determine the status of the existing pre-compensation design (including under-compensation, over-compensation, or correct compensation). Used to modify the step size of the existing pre-compensation design. As the iterative optimization proceeds, It can make adaptive adjustments according to the evolution trend of the output waveform to match the ratio relationship between the output waveform and the input waveform, thereby improving the overall efficiency of iterative optimization.

[0053] Reference Figure 1 , a radar signal high-power amplification device based on optical microwave technology is provided, comprising:

[0054] A seed light modulation module, used to generate a seed laser signal that matches the time domain characteristics of the input radar signal;

[0055] An optical power amplification module, used to amplify the optical power of the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal;

[0056] The optical signal detection and feedback processing module is used to collect a small part of the laser signal output by the optical power amplifier module to detect the time domain waveform of the laser signal output by the power amplifier module, thereby using the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, and through waveform analysis and iterative correction of the adaptive ratio optimization algorithm, the optimal pre-compensation waveform data is obtained and fed back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal;

[0057] The photoconductive microwave module utilizes a high-peak power laser signal that matches the time domain characteristics of the input radar signal to irradiate the photoconductive semiconductor device in the photoconductive microwave module, generates and outputs a high-peak power electrical signal with the same time domain characteristics as the input radar signal, and realizes high-power amplification of the input radar signal.

[0058] Reference Figure 2 , Figure 2 1 is a schematic diagram of a seed light modulation module provided by an embodiment, wherein the seed light modulation module includes a semiconductor laser diode, an arbitrary signal generator, a high-speed electro-optical modulator and a driver thereof;

[0059] The semiconductor laser diode pigtail is fused to the optical fiber input end of the high-speed electro-optic modulator;

[0060] Connecting the signal output of any signal generator to the signal input of the high-speed electro-optic modulator driver by using a coaxial cable;

[0061] A semiconductor laser diode outputs a continuous laser, and then an arbitrary signal generator is used to output an electrical modulation signal with the same time domain characteristics as the output radar signal to drive a high-speed electro-optical modulator to modulate the continuous laser output by the semiconductor laser diode, thereby generating a seed laser signal that matches the time domain characteristics of the input radar signal.

[0062] Reference Figure 3 , Figure 3 The multi-stage power amplifier module provided by an embodiment is a schematic diagram, wherein the optical power amplifier module is a multi-stage optical power amplifier module composed of more than one optical power amplifier connected in series. The optical power amplifier module increases the peak power of the seed laser signal to the megawatt level.

[0063] Reference Figure 4 , Figure 4 This is a schematic diagram of an optical power amplifier provided by an embodiment. The optical power amplifier is a fiber amplifier. Each stage of the optical power amplifier includes a pump source, a wavelength division multiplexer (or a pump-signal combiner), a gain fiber, and a fiber isolator. The optical fiber output end of the intensity-type electro-optic modulator is fused to the input end of the fiber isolator, the output end of the fiber isolator is fused to the signal end of the wavelength division multiplexer (or pump-signal combiner), the pump source is fused to the pump end of the wavelength division multiplexer (or pump-signal combiner); the output end of the wavelength division multiplexer (or pump-signal combiner) is fused to the gain fiber, and multiple stages can be connected in series according to this method. The function of the multi-stage power amplifier module is to increase the peak power of the fiber laser seed to the megawatt level.

[0064] By arranging a spectroscopic device on one side of the output end of the power amplifier module, after passing through the spectroscopic device, the laser signal output by the optical power amplifier module with most power is transmitted to the optical microwave module, and the laser signal output by the optical power amplifier module with a small power is transmitted to the optical signal detection and feedback processing module.

[0065] Reference Figure 5 , Figure 5This is a schematic diagram of an optical signal detection and feedback processing module provided by an embodiment. The optical signal detection and feedback processing module includes a high-speed photodetector, an oscilloscope and a computing unit. The time domain waveform of the laser signal input to the optical signal detection and feedback processing module is measured by the high-speed photodetector and the oscilloscope and transmitted to the computing unit. The computing unit analyzes the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, calculates the optimal pre-compensation waveform data and sends it to an arbitrary signal generator, controls the arbitrary signal generator to output an electrical modulation signal with the same time domain characteristics as the output radar signal to drive the high-speed electro-optical modulator to modulate the continuous laser output by the semiconductor laser diode, and optimizes the time domain characteristics of the seed laser signal.

[0066] Specifically, the optical signal detection and feedback processing module includes a high-speed photodetector, an oscilloscope and a computing unit. The high-speed photodetector and the oscilloscope are used to measure the time domain waveform of the laser signal input to the optical signal detection and feedback processing module and transmit it to the computing unit. The computing unit analyzes the distortion degree of the laser signal output by the optical power amplifier module due to gain saturation through the similarity evaluation function, and obtains the optimal pre-compensation waveform data through waveform analysis and iterative correction of the adaptive ratio optimization algorithm and feeds it back to the arbitrary signal generator. The similarity evaluation function is as follows:

[0067] ;

[0068] in, represents the similarity deviation, Indicates the number of sampling points of the time domain waveform of the laser signal, represents the time domain waveform of the measured laser signal, Represents the target waveform; through similarity deviation Evaluate the deviation between the time domain waveform of the measured laser signal and the target waveform. The greater the deviation, the greater the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation.

[0069] The arbitrary signal generator outputs an electrical modulation signal having the same time domain characteristics as the output radar signal to drive a high-speed electro-optic modulator to modulate the continuous laser output by the semiconductor laser diode, thereby optimizing the time domain characteristics of the seed laser signal.

[0070] The function of the optical signal detection and feedback processing module is to analyze the laser output characteristics and guide the seed light modulation module to perform waveform pre-compensation so that the time domain characteristics of the final pulse output laser meet the requirements.

[0071] Reference Figure 6 , Figure 6The schematic diagram of a photoconductive microwave module provided by an embodiment includes a photoconductive semiconductor device, a high-voltage DC constant voltage source, a current observation resistor, a load resistor and a capacitor, and these devices form a series circuit. The output laser with a megawatt peak power generated by the multi-stage power amplifier module is spatially coupled to the photoconductive semiconductor device, and a large current signal with the same time domain characteristics as the laser can be generated in the series circuit, and the peak power of the output signal is output according to the formula P=U*I.

[0072] like Figure 7 As shown, Figure 7 This is an example diagram of a power amplification process for a linear frequency modulation radar signal with a peak power of 1W according to an embodiment. Figures 1 to 5 The power amplification process of the radar signal high power amplification device based on the optical microwave technology is described. When the external voltage is 18 kilovolts, a laser with a peak power of 2 megawatts can be used to irradiate the optical semiconductor device, which can generate a peak current of nearly 590 amperes, corresponding to a peak power of 10 megawatts.

[0073] The present invention utilizes the new technical route of "electrical signal-optical signal-electrical signal" to achieve high-power amplification of radar signals, which can replace traditional electrical power amplification and give full play to the significant advantages of the high peak power limit of multi-stage optical power amplifiers and the high response speed, high withstand voltage, and high operating current of photoconductive semiconductor devices. It breaks through the peak power bottleneck of microwave power amplifiers based on electronic technology and amplifies the peak power of radar signals to 10MW or above for the first time.

[0074] Matters not covered by the present invention are known technologies.

[0075] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. High-power amplification method of radar signals based on optical microwave technology, It is characterized in that include: generating a seed laser signal that matches the time domain characteristics of an input radar signal; The optical power amplifier module performs optical power amplification on the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal; a small portion of the laser signal output by the optical power amplifier module is collected to detect the time domain waveform of the laser signal output by the power amplifier module, so as to use the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation, and through waveform analysis and iterative correction of the adaptive ratio optimization algorithm, the optimal pre-compensation waveform data is obtained and fed back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal. The similarity evaluation function is as follows: in represents the similarity deviation, Indicates the number of sampling points of the time domain waveform of the laser signal, represents the time domain waveform of the measured laser signal, Represents the target waveform; through similarity deviation Evaluate the deviation between the time domain waveform of the measured laser signal and the target waveform. The greater the deviation, the greater the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation. A high-peak power laser signal that matches the time domain characteristics of the input radar signal is used to irradiate the photoconductive semiconductor device in the photoconductive microwave module, thereby generating and outputting a high-peak power electrical signal with the same time domain characteristics as the input radar signal, thereby achieving high-power amplification of the input radar signal.

2. Radar signal high power amplifier based on optical microwave technology, It is characterized in that include: A seed light modulation module, used to generate a seed laser signal that matches the time domain characteristics of the input radar signal; An optical power amplification module, used to amplify the optical power of the seed laser signal to generate a high peak power laser signal that matches the time domain characteristics of the input radar signal; The optical signal detection and feedback processing module is used to collect a small part of the laser signal output by the optical power amplifier module to detect the time domain waveform of the laser signal output by the power amplifier module, so as to use the similarity evaluation function to analyze the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation. Through the waveform analysis and iterative correction of the adaptive ratio optimization algorithm, the optimal pre-compensation waveform data is obtained and fed back to the seed light modulation module to optimize the time domain characteristics of the seed laser signal. The similarity evaluation function is as follows: in represents the similarity deviation, Indicates the number of sampling points of the time domain waveform of the laser signal, represents the time domain waveform of the measured laser signal, Represents the target waveform, through the similarity deviation Evaluate the deviation between the time domain waveform of the measured laser signal and the target waveform. The greater the deviation, the greater the degree of distortion of the laser signal output by the optical power amplifier module due to gain saturation. The photoconductive microwave module utilizes a high-peak power laser signal that matches the time domain characteristics of the input radar signal to irradiate the photoconductive semiconductor device in the photoconductive microwave module, generates and outputs a high-peak power electrical signal with the same time domain characteristics as the input radar signal, and realizes high-power amplification of the input radar signal.

3. The radar signal high-power amplifier based on optical microwave technology according to claim 2, It is characterized in that The seed light modulation module includes a semiconductor laser diode, an arbitrary signal generator, a high-speed electro-optical modulator and a driver thereof; The semiconductor laser diode pigtail is fused to the optical fiber input end of the high-speed electro-optic modulator; Connecting the signal output of any signal generator to the signal input of the high-speed electro-optic modulator driver by using a coaxial cable; A semiconductor laser diode outputs a continuous laser, and then an arbitrary signal generator is used to output an electrical modulation signal with the same time domain characteristics as the output radar signal to drive a high-speed electro-optical modulator to modulate the continuous laser output by the semiconductor laser diode, thereby generating a seed laser signal that matches the time domain characteristics of the input radar signal.

4. The radar signal high-power amplification device based on optical microwave technology according to claim 3, It is characterized in that The optical power amplification module is a multi-stage optical power amplification module formed by connecting more than one stage of optical power amplifiers in series.

5. The radar signal high power amplification device based on optical microwave technology according to claim 3, It is characterized in that The optical power amplification module increases the peak power of the seed laser signal to the megawatt level.

6. The radar signal high-power amplification device based on optical microwave technology according to claim 3, 4 or 5, It is characterized in that A spectrometer is provided on one side of the output end of the power amplifier module. After passing through the spectrometer, the laser signal output by the optical power amplifier module with most power is transmitted to the optical microwave module, and the laser signal output by the optical power amplifier module with a small power is transmitted to the optical signal detection and feedback processing module.

7. The radar signal high power amplification device based on optical microwave technology according to claim 6, It is characterized in that The optical signal detection and feedback processing module includes a high-speed photodetector, an oscilloscope and a computing unit. The high-speed photodetector and the oscilloscope are used to measure the time domain waveform of the laser signal input to the optical signal detection and feedback processing module and transmit it to the computing unit. The computing unit analyzes the distortion degree of the laser signal output by the optical power amplifier module due to gain saturation through a similarity evaluation function, and obtains the optimal pre-compensation waveform data through waveform analysis and iterative correction of an adaptive ratio optimization algorithm and feeds it back to the arbitrary signal generator. The arbitrary signal generator outputs an electrical modulation signal having the same time domain characteristics as the output radar signal to drive a high-speed electro-optic modulator to modulate the continuous laser output by the semiconductor laser diode, thereby optimizing the time domain characteristics of the seed laser signal.

8. The radar signal high-power amplification device based on optical microwave technology according to claim 7, It is characterized in that The photoconductive microwave module includes a photoconductive semiconductor device, a high-voltage DC constant voltage source, a current observation resistor, a load resistor and a capacitor. These devices form a series circuit. The output laser with a megawatt peak power generated by the optical power amplifier module is spatially coupled to the photoconductive semiconductor device. A large current signal with the same time domain characteristics as the laser can be generated in the series circuit. According to the formula Output signal peak power, where P represents power value, U represents voltage value, and I represents current value.

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