Multi-dimensional domain signal measuring device based on stimulated Brillouin scattering effect

Abstract

The invention discloses a multi-dimensional domain signal measuring device based on a stimulated Brillouin scattering effect, and the device simulates the arrival angle information of a signal through the phase modulation introduced by an optical phase shifter, and maps the space information of a to-be-measured signal through the difference of the beat frequency power of different arrival angles. A stimulated Brillouin scattering effect (SBS) is utilized to perform frequency selection on a chirp optical pulse sequence (COPS) to obtain frequency and time information of a signal to be measured, and energy information of the signal to be measured is obtained by utilizing the difference of modulation depths of the modulator by the signals to be measured with different energies. By performing multi-dimensional mapping on space, frequency, time and energy dimension information, high-precision measurement on multi-dimensional domain signals of the to-be-measured signals can be realized at the same time. The method has the advantages of high measurement speed, high precision, large instantaneous bandwidth and the like, and can be widely applied to the fields of radar signal detection, electronic countermeasure, microwave communication and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave photons, and in particular relates to a multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect. Background Art

[0002] With the development of modern communications, radar, navigation, electronic countermeasures and other fields, the accuracy and sensitivity requirements of signal measurement technology in multiple dimensions such as frequency, time, space and power are increasing. Traditional microwave signal measurement technology is limited by the bandwidth, noise and sensitivity of electronic devices, and it is difficult to meet the requirements of high precision and real-time performance in an extremely wide frequency band. Therefore, it is particularly important to develop new high-sensitivity and broadband measurement technology.

[0003] The stimulated Brillouin Scattering (SBS) effect provides a possibility to break through the limitations of traditional measurement technology. The SBS effect is a nonlinear effect caused by the interaction between light and sound waves in optical fibers, which has extremely high frequency selectivity and sensitivity. This effect can modulate microwave signals into light waves and achieve high-precision, broadband signal measurement through optical fiber systems. It is not only suitable for frequency measurement, but can also be extended to signal parameter measurements in other dimensions, such as time, angle of arrival, and power. Due to the low loss and ultra-wideband characteristics of optical fiber systems, measurement devices based on the SBS effect can significantly improve measurement performance, breaking through the bandwidth and sensitivity limitations of traditional electronic devices.

[0004] In recent years, signal measurement technology based on the SBS effect has been widely studied and applied. This type of technology shows great potential in microwave photonic links, especially in multi-dimensional signal measurement, such as accurate measurement of frequency, arrival time and arrival angle. By regulating the gain and scattering frequency in the SBS effect, multi-dimensional measurement of the signal can be achieved. However, current research mainly focuses on single-dimensional measurement. Integrating multi-dimensional measurement functions and achieving efficient and accurate multi-dimensional signal measurement in the same system are still important technical challenges currently faced. Summary of the invention

[0005] To solve this problem, the present invention proposes a multi-dimensional signal measurement device based on the SBS effect. The device aims to integrate the precise measurement of multiple dimensions such as frequency, arrival time, arrival angle and power, further improve the accuracy, bandwidth and real-time performance of signal measurement, and provide a new technical means for the precise measurement needs in modern communications, radar and navigation.

[0006] The technical solutions proposed in some embodiments of the present invention are as follows: A multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect, comprising a light source, based on a tunable laser, for providing a high-stability optical carrier, and realizing modulation and transmission of microwave signals in a microwave photonic link; a pump optical path coupled to the light source through an optical coupler, the pump optical path comprising a dual-driven Mach-Zehnder modulator, a radio frequency source, a radio frequency phase shifter, a first optical filter and an optical amplifier, wherein the radio frequency source cooperates with the radio frequency phase shifter to provide a signal to be measured with different phase information, which is simultaneously input into the dual-driven Mach-Zehnder modulator and the optical carrier, and the bias point of the dual-driven Mach-Zehnder modulator is controlled to a minimum point, so that it is in a carrier-suppressed double-sideband modulation state; The first optical filter is configured to retain the positive first-order sideband of the modulation signal output by the dual-drive Mach-Zehnder modulator; the optical amplifier amplifies the output positive first-order sideband so that the output first-order sideband signal meets the threshold of the stimulated Brillouin scattering effect; the detection optical path coupled to the light source through an optical coupler includes a Mach-Zehnder intensity modulator, an arbitrary waveform generator, a second optical filter, an optical isolator, and a high nonlinear optical fiber; wherein the arbitrary waveform generator is configured as a linear frequency modulated pulse signal matching the frequency range of the signal to be measured; the Mach-Zehnder intensity modulator is configured to modulate the optical carrier onto the linear frequency modulated signal to generate a second modulated optical signal, The second modulated optical signal is a signal light of periodic linear frequency sweep; the second optical filter is configured to retain the optical carrier and positive first-order sideband signal of the Mach-Zehnder intensity modulator as the detection light; the optical isolator is configured so that the optical path direction is the transmission direction of the detection light at this time, the high nonlinear optical fiber is configured as a gain medium of stimulated Brillouin scattering, and stimulated Brillouin scattering effect occurs in the high nonlinear optical fiber; the circulator coupled to the pump optical path and the detection optical path is configured to receive the pump optical signal, so that the pump optical signal and the detection optical signal are transmitted in opposite directions in the high nonlinear optical fiber, and stimulated Brillouin scattering effect occurs in the high nonlinear optical fiber to generate frequency selection information, so as to complete the A frequency selection of a detection optical signal, wherein the frequency selection information includes the frequency, time, phase or power information of the signal to be measured; a photodetector coupled to the optical circulator, wherein the photodetector is configured to convert the optical signal after spectrum selection into an electrical signal, wherein the time information and amplitude information corresponding to the peak value of the electrical signal can be used to map the frequency, time, phase or power information of the signal to be measured; and a measuring unit, configured to receive the electrical signal generated by the photodetector and output a waveform based on the electrical signal, wherein the output waveform reflects the frequency, time, phase or power information of the signal to be measured; wherein the measuring unit is configured to be consistent with the clock trigger of the arbitrary waveform generator.

[0007] In some embodiments, the bandwidth of the dual-drive Mach-Zehnder modulator, the Mach-Zehnder intensity modulator, and the photodetector covers the frequency of the signal to be detected.

[0008] In some embodiments, the first optical filter is configured so that its passband covers the positive first-order sideband output by the dual-drive Mach-Zehnder modulator 3, and the second optical filter is configured so that its passband covers the optical carrier of the Mach-Zehnder intensity modulator and the positive first-order periodic linear swept signal light.

[0009] In some embodiments, the optical amplifier is configured such that the optical power after being amplified by the optical amplifier satisfies a threshold condition of a stimulated Brillouin scattering effect.

[0010] In some embodiments, the microwave signal is mapped to the optical domain using the dual-drive Mach-Zehnder modulator, which applies radio frequency signals to two independent electrical drive ports, respectively, performs precise phase modulation on the input optical signal, and obtains a modulated optical signal carrying information of the signal to be measured, and generates a pump optical signal carrying useful information by filtering and amplifying the modulated optical signal.

[0011] In some embodiments, the output end of the tunable laser is connected to the input end of the optical coupler, the output port of the optical coupler is connected to the input port of the dual-driven Mach-Zehnder modulator, the first output port of the RF source is connected to the input port of the RF phase shifter, the output port of the RF phase shifter is connected to the first RF input port of the dual-driven Mach-Zehnder modulator, the second output port of the RF source is connected to the second RF input port of the dual-driven Mach-Zehnder modulator, the output port of the dual-driven Mach-Zehnder modulator is connected to the input port of the first optical filter, the output port of the first optical filter is connected to the input port of the optical amplifier, the output port of the optical amplifier is connected to the first port of the optical circulator, and the output port of the optical coupler is connected to the Mach-Zehnder The output of the arbitrary waveform generator is connected to the input port of the Mach-Zehnder intensity modulator, the output port of the Mach-Zehnder intensity modulator is connected to the input port of the second optical filter, the output port of the second optical filter is connected to the input port of the optical isolator, the output port of the optical isolator is connected to the input port of the high nonlinear optical fiber, the output port of the high nonlinear optical fiber is connected to the second port of the optical ring 8, the third port of the optical circulator is connected to the input port of the photodetector, the output port of the photodetector is connected to the receiving port of the oscilloscope, and the time trigger port of the arbitrary waveform generator is connected to the time trigger receiving port of the oscilloscope to ensure the consistency of the time trigger at this time.

[0012] In some embodiments, the measuring unit measures the power information and the phase information in a first time period and a second time period respectively.

[0013] In some embodiments, the measuring unit is configured to perform the following operations: it matches the frequency of the signal to be measured at the time corresponding to the peak value of the scanning period to obtain the frequency information of the signal to be measured, obtains the time information of the signal to be measured by the time when the signal to be measured with different frequencies generates a beat frequency signal, obtains the phase information of the signal to be measured by mapping the beat frequency power of the first-order sideband signal with the same frequency but different phase, and obtains the power information of the signal to be measured by mapping the power size of the first-order sideband signal.

[0014] In some embodiments, the measuring unit is an oscilloscope or a computer device running measuring software.

[0015] In the present invention, the response bandwidth of the dual-driven Mach-Zehnder modulator is configured to cover the frequency range of the signal to be measured, the response bandwidth of the Mach-Zehnder intensity modulator is configured to cover the frequency range of the swept frequency signal (i.e., the frequency range of the signal to be measured minus the stimulated Brillouin frequency shift), and the response bandwidth of the photodetector is configured to cover the frequency range of the beat frequency signal; the passband of the optical filter should cover the positive first-order sideband output by the dual-driven Mach-Zehnder modulator, and the passband of the optical filter should cover the optical carrier of the Mach-Zehnder intensity modulator 9 and the signal light of the positive first-order periodic linear sweep. The optical power amplified by the optical amplifier should meet the threshold condition of the stimulated Brillouin scattering effect; wherein, the dual-driven Mach-Zehnder modulator is used to map the microwave signal to the optical domain, and the pump optical signal carrying the frequency, time, phase or power information of the signal to be measured is generated in cooperation with the first optical filter and the optical amplifier; the time trigger port of the arbitrary waveform generator is connected to the time trigger receiving port of the measurement unit to ensure that the time trigger at this time is consistent to match the arrival time of the signal.

[0016] The beneficial effects of the present application are as follows: the multi-dimensional domain signal measurement device in some embodiments of the present application obtains a beat signal by causing stimulated Brillouin scattering (SBS) effect in the highly nonlinear optical fiber between the optical signal to be measured and the linear frequency modulation signal providing a reference, and matches the frequency, time, phase or power information of the signal to be measured through the beat signal. The frequency and time information of the multi-dimensional domain signal measurement device in the embodiments of the present application can measure single-frequency and multi-frequency signals; while the power or phase information can only measure single-frequency signals, with an instantaneous bandwidth of 20GHz, a frequency measurement accuracy of less than 5MHz, a phase measurement accuracy of less than 2°, and a power measurement accuracy of less than 3dB. The measurement range and instantaneous bandwidth in the embodiments of the present application can be adjusted by the sweep bandwidth of the sweep signal. In theory, the frequency measurement range can cover the PU band. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the spectrum of a multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect according to an embodiment of the present invention.

[0019] Figure 3 4 is a phase difference measurement diagram of a multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect according to an embodiment of the present invention.

[0020] Figure 4 This is a waveform diagram of a radio frequency signal actually measured by a multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect according to an embodiment of the present invention.

[0021] Figure 5 This is a diagram of single-frequency signal spectrum measurement results of a multi-dimensional domain signal measurement device based on stimulated Brillouin scattering effect according to an embodiment of the present invention.

[0022] In the figure: tunable laser 1, optical coupler 2, dual-drive Mach-Zehnder modulator 3, RF source 4, RF phase shifter 5, optical filter 6, optical amplifier 7, circulator 8, Mach-Zehnder intensity modulator 9, arbitrary waveform generator 10, optical filter 11, optical isolator 12, high nonlinear optical fiber 13, photodetector 14, oscilloscope 15. DETAILED DESCRIPTION

[0023] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, further detailed descriptions are given below in conjunction with the accompanying drawings and embodiments.

[0024] The structure of the multi-dimensional domain signal measurement device of the present invention is as follows: Figure 1As shown, the optical system is composed of a tunable laser 1, an optical coupler 2, a dual-drive Mach-Zehnder modulator 3, a radio frequency source 4, a radio frequency phase shifter 5, a first optical filter 6, an optical amplifier 7, a circulator 8, a Mach-Zehnder intensity modulator 9, an arbitrary waveform generator 10, a second optical filter 11, an optical isolator 12, a highly nonlinear optical fiber 13, a photodetector 14, an oscilloscope 15 and other devices.

[0025] The output end of the tunable laser 1 is connected to the input end of the optical coupler 2, the output port 21 of the optical coupler 2 is connected to the input port 31 of the dual-driven Mach-Zehnder modulator 3, the first output port 41 of the radio frequency source 4 is connected to the input port 51 of the radio frequency phase shifter 5, the output port 52 of the radio frequency phase shifter 5 is connected to the first radio frequency input port 32 of the dual-driven Mach-Zehnder modulator 3, the second output port 42 of the radio frequency source 4 is connected to the second radio frequency input port 33 of the dual-driven Mach-Zehnder modulator 3, the output port 34 of the dual-driven Mach-Zehnder modulator 3 is connected to the input port of the first optical filter 6, the output port of the first optical filter 6 is connected to the input port of the optical amplifier 7, the output port of the optical amplifier 7 is connected to the first port 81 of the optical circulator 8, and the output port 22 of the optical coupler 2 is connected to the first port 81 of the Mach-Zehnder intensity modulator 9. The input port 91 is connected, the output 102 of the arbitrary waveform generator 10 is connected to the RF input port 92 of the Mach-Zehnder intensity modulator 9, the output port 93 of the Mach-Zehnder intensity modulator 9 is connected to the input port of the second optical filter 11, the output port of the second optical filter 11 is connected to the input port of the optical isolator 12, the output port of the optical isolator 12 is connected to the input port of the highly nonlinear optical fiber 13, the output port of the highly nonlinear optical fiber 13 is connected to the second port 82 of the optical ring 8, the third port 83 of the optical circulator 8 is connected to the input port 141 of the photodetector 14, the output port 142 of the photodetector 14 is connected to the receiving port 151 of the oscilloscope 15, and the time trigger port 101 of the arbitrary waveform generator 10 is connected to the time trigger receiving port 152 of the oscilloscope 15 to ensure the consistency of the time trigger at this time.

[0026] After connecting the above devices, turn on the switches of each device to put all devices in working condition.

[0027] Taking the measurement range of 20-40GHz as an example: the tunable laser 1 outputs an optical signal with a wavelength of 1550.08nm, and 90% of the optical signal is output to the upper path, i.e., the pump optical path, through the 1:9 coupler 2. The signal to be measured from the RF source 4 and the RF phase shifter 5 is subjected to carrier suppressed double-sideband modulation by the dual-driven Mach-Zehnder modulator 3. After filtering by the first optical filter 6 with a central wavelength of 1550.64nm and a bandwidth of 50GHz, only the negative first-order sideband is retained. The optical signal is amplified by the optical amplifier 7. At this time, the optical amplifier is a constant gain amplification with a constant gain of 500mw. The optical signal after the gain of the optical amplifier is used as the pump light in the device; 10% of the optical signal output by the coupler 2 is sent to the lower path, i.e., the detection optical path, and a chirped optical pulse sequence (COPS) is generated by the chirped microwave signal generated by the Mach-Zehnder intensity modulator 9 in cooperation with the arbitrary waveform generator 10. The pulse period of the pulse signal generated by the arbitrary waveform generator 10 is 5 us, the duty cycle is 80%, the sweep range is 30-50GHz, and the optical carrier and the corresponding negative first-order sideband are filtered out by the second optical filter 11 with a central wavelength of 1550.48nm and a bandwidth of 50GHz. At this time, the optical signal is used as the detection light in the device. The two optical signals of the pump light and the detection light enter the circulator 8, and the stimulated Brillouin scattering SBS effect occurs in the highly nonlinear optical fiber 13 to complete the spectrum selection. After the frequency selection, the optical signal is converted into an electrical signal by the photodetector 14 as an output signal, which is output through the oscilloscope 15. According to the time and power information of the output signal, the frequency information, time information, phase information and / or power information of the signal to be measured can be obtained.

[0028] In some embodiments of the present application, the frequency information of the signal to be measured is obtained by matching the frequency of the signal to be measured at the time corresponding to the peak value of the sweep cycle of the signal to be measured, the time information of the signal to be measured is obtained by the time when the signal to be measured with different frequencies generates a beat frequency signal, the phase information of the signal to be measured is obtained by mapping the beat frequency power of sideband signals with the same frequency but different phases, and the power information of the signal to be measured is obtained by mapping the power size of the sideband signal.

[0029] In some embodiments of the present application, the bandwidth of the dual-drive Mach-Zehnder modulator 3 , the Mach-Zehnder intensity modulator 9 and the photodetector 14 should cover the frequency of the signal to be measured.

[0030] In some embodiments of the present application, the first optical filter 6 is configured so that its passband covers the positive first-order sideband output by the dual-drive Mach-Zehnder modulator 3, and the second optical filter 11 is configured so that its passband covers the optical carrier of the Mach-Zehnder intensity modulator 9 and the positive first-order periodic linear swept signal light.

[0031] In some embodiments of the present application, the optical amplifier 7 is configured so that the optical power amplified by the optical amplifier 7 satisfies the threshold condition of the stimulated Brillouin scattering effect.

[0032] In some embodiments of the present application, the microwave signal is mapped to the optical domain using the dual-driven Mach-Zehnder modulator 3, and the dual-driven Mach-Zehnder modulator 3 applies radio frequency signals to two independent electrical drive ports respectively, performs precise phase modulation on the input optical signal, and obtains a modulated optical signal carrying information of the signal to be measured, and generates a pump optical signal carrying useful information by filtering and amplifying the modulated optical signal.

[0033] In this device, power information and phase information cannot be obtained at the same time, and need to be measured in steps, that is, a first measurement operation is performed in a first time period to obtain power information, and a second measurement operation is performed in a second time period to obtain phase information.

[0034] In other embodiments of the present application, a computer device installed with measurement software may be used to replace the oscilloscope as the measurement unit.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and inventive concept of the present invention within the technical scope of the present invention, which should be included in the protection scope of the present invention.

Claims

1. A multi-dimensional signal measurement device based on stimulated Brillouin scattering effect, characterized in that: include A light source, based on a tunable laser (1), is used to provide a highly stable optical carrier to achieve modulation and transmission of microwave signals in a microwave photonic link; A pump optical path coupled to the light source through an optical coupler (2), the pump optical path comprising a dual-driven Mach-Zehnder modulator (3), a radio frequency source (4), a radio frequency phase shifter (5), a first optical filter (6) and an optical amplifier (7), wherein the radio frequency source (4) cooperates with the radio frequency phase shifter (5) to provide a signal to be measured with different phase information and the optical carrier to be simultaneously input into the dual-driven Mach-Zehnder modulator (3), and controls the bias point of the dual-driven Mach-Zehnder modulator (3) to a minimum point so that it is in a carrier-suppressed double-sideband modulation state; the first optical filter (6) is configured to retain the positive first-order sideband of the output modulation signal of the dual-driven Mach-Zehnder modulator (3); the optical amplifier (7) amplifies the output positive first-order sideband so that the output first-order sideband signal meets the threshold of the stimulated Brillouin scattering effect; A detection optical path coupled to the light source through an optical coupler (2), the detection optical path comprising a Mach-Zehnder intensity modulator (9), an arbitrary waveform generator (10), a second optical filter (11), an optical isolator (12), and a highly nonlinear optical fiber (13); wherein the arbitrary waveform generator (10) is configured as a linear frequency modulation pulse signal matching the frequency range of the signal to be measured; the Mach-Zehnder intensity modulator (9) is configured to modulate the optical carrier onto the linear frequency modulation signal to generate a second modulated optical signal, the second modulated optical signal being a periodic linear frequency swept signal light; the second optical filter (11) is configured to retain the optical carrier and the positive first-order sideband signal of the Mach-Zehnder intensity modulator (9) as detection light; the optical isolator (12) is configured such that the optical path direction is the transmission direction of the detection light at this time; the highly nonlinear optical fiber (13) is configured as a gain medium for stimulated Brillouin scattering, and a stimulated Brillouin scattering effect occurs in the highly nonlinear optical fiber; A circulator (8) coupled to the pump optical path and the detection optical path is configured to receive a pump optical signal, so that the pump optical signal and the detection optical signal are transmitted in opposite directions in a highly nonlinear optical fiber, and a stimulated Brillouin scattering effect occurs in the highly nonlinear optical fiber to generate frequency selection information, so as to complete the frequency selection of the detection optical signal, wherein the frequency selection information includes the frequency, time, phase or power information of the signal to be measured; A photodetector (14) coupled to the optical circulator (8), the photodetector (14) being configured to convert the spectrum-selected optical signal into an electrical signal, wherein time information and amplitude information corresponding to the peak value of the electrical signal can be used to map the frequency, time, phase or power information of the signal to be measured; and a measuring unit configured to receive the electrical signal generated by the photodetector and output a waveform based on the electrical signal, wherein the output waveform reflects the frequency, time, phase or power information of the signal to be measured; wherein the measuring unit is configured to be consistent with the clock trigger of the arbitrary waveform generator (10).

2. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The bandwidths of the dual-drive Mach-Zehnder modulator (3), the Mach-Zehnder intensity modulator (9) and the photodetector (14) cover the frequency of the signal to be measured.

3. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The first optical filter (6) is configured so that its passband covers the positive first-order sideband output by the dual-drive Mach-Zehnder modulator 3, and the second optical filter (11) is configured so that its passband covers the optical carrier of the Mach-Zehnder intensity modulator (9) and the positive first-order periodic linear swept signal light.

4. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The optical amplifier (7) is configured so that the optical power amplified by the optical amplifier (7) satisfies the threshold condition of the stimulated Brillouin scattering effect.

5. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The microwave signal is mapped onto the optical domain using the dual-drive Mach-Zehnder modulator (3). The dual-drive Mach-Zehnder modulator (3) applies radio frequency signals to two independent electrical drive ports respectively, performs precise phase modulation on the input optical signal, and obtains a modulated optical signal carrying information of the signal to be measured. A pump optical signal carrying useful information is generated by filtering and amplifying the modulated optical signal.

6. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The output end of the tunable laser (1) is connected to the input end of the optical coupler (2); the output port (21) of the optical coupler (2) is connected to the input port of the dual-driven Mach-Zehnder modulator (3); the first output port (41) of the radio frequency source (4) is connected to the input port (51) of the radio frequency phase shifter (5); the output port (52) of the radio frequency phase shifter (5) is connected to the first radio frequency input port (32) of the dual-driven Mach-Zehnder modulator (3); the second output port (42) of the radio frequency source (4) is connected to the second radio frequency input port (33) of the dual-driven Mach-Zehnder modulator (3); the output port of the dual-driven Mach-Zehnder modulator (3) is connected to the input port of the first optical filter (6); the output port of the first optical filter (6) is connected to the input port of the optical amplifier (7); the output port of the optical amplifier (7) is connected to the first port (81) of the optical circulator (8); the output port ( 22) is connected to the input port of the Mach-Zehnder intensity modulator (9), the output of the arbitrary waveform generator (10) is connected to the radio frequency input port of the Mach-Zehnder intensity modulator (9), the output port of the Mach-Zehnder intensity modulator (9) is connected to the input port of the second optical filter (11), the output port of the second optical filter (11) is connected to the input port of the optical isolator (12), the output port of the optical isolator (12) is connected to the input port of the highly nonlinear optical fiber (13), the output port of the highly nonlinear optical fiber (13) is connected to the second port (82) of the optical ring 8, the third port (83) of the optical ring (8) is connected to the input port of the photodetector (14), the output port of the photodetector (14) is connected to the receiving port of the oscilloscope (15), and the time trigger port of the arbitrary waveform generator (10) is connected to the time trigger receiving port of the oscilloscope (15), so as to ensure the consistency of the time trigger at this time.

7. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The measuring unit measures the power information and the phase information in a first time period and a second time period respectively.

8. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The measuring unit is configured to perform the following operations: it matches the frequency of the signal to be measured at the time corresponding to the peak value of the frequency sweep period to obtain the frequency information of the signal to be measured, obtains the time information of the signal to be measured by the time when the signal to be measured with different frequencies generates a beat frequency signal, obtains the phase information of the signal to be measured by mapping the beat frequency power of the first-order sideband signal with the same frequency but different phase, and obtains the power information of the signal to be measured by mapping the power size of the first-order sideband signal.

9. The multi-dimensional signal measurement device based on stimulated Brillouin scattering effect according to claim 1, characterized in that: The measuring unit is an oscilloscope or a computer device running measuring software.

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