All-optical regulation and control device and method for broadband microwave signal multi-dimensional parameters
By converting microwave signals into optical signals and regulating them using photonic processing methods, the problem of insufficient multi-dimensional parameter regulation capability of microwave signals in the prior art is solved, and efficient regulation of broadband microwave signals and adaptation to larger bandwidth are achieved.
Patent Information
- Application Number
- CN202510215425.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-05-30
AI Technical Summary
The existing microwave technology and digital radio frequency storage technology have limitations in the adaptability and regulation capabilities of high-frequency and broadband signals, and it is difficult to effectively regulate the multi-dimensional parameters of microwave signals.
By converting broadband microwave signals into optical signals and using specific photonic processing methods, the frequency, phase, delay and amplitude parameters of the signal are jointly or independently regulated, and the all-optical control device and method are used.
It improves the multi-dimensional parameter control capability of broadband microwave signals, adapts to microwave signals with larger bandwidth, ensures signal processing speed and efficiency, and meets the application needs of electronic information systems such as radar and communication.
Smart Images
Figure CN120074681A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of microwave photonics, and particularly to an all-optical regulation device and method for multi-dimensional parameters of broadband microwave signals. Background Art
[0002] In the field of microwave photonics, the prior art for regulating the frequency, phase, delay, and amplitude parameters of microwaves generally falls into two categories: microwave technology and digital radio frequency storage technology (DRFM).
[0003] Among them, microwave technology directly uses different devices to achieve parameter regulation of microwave signals. For example, a microwave mixer is used to frequency-convert microwave signals, a microwave phase shifter is used to shift the phase of microwave signals, a microwave delay line is used to delay microwave signals, and a microwave amplifier or attenuator is used to amplify or reduce the amplitude of microwave signals.
[0004] DRFM technology converts microwave signals through analog-to-digital conversion (ADC), then calculates the stored digital waveforms, can flexibly change the multi-dimensional parameters of the signals, and then generates microwave signals after parameter regulation through digital-to-analog conversion (DAC).
[0005] The above methods all have the problem of limited adaptability to high-frequency and broadband signals; for microwave technology, the transmission loss of high-frequency signals is large, and it is difficult to maintain consistency within a large bandwidth; for DRFM technology, there are difficulties in frequency conversion, ADC, DAC, and digital calculation of broadband signals. Summary of the Invention
[0006] To solve the above problems, the present invention provides an all-optical regulation device and method for multi-dimensional parameters of broadband microwave signals. By converting broadband microwave signals into optical signals and using specific photonics processing methods, the frequency, phase, delay, and amplitude parameters of the signals are jointly or independently regulated. Compared with the existing microwave technology and digital technology, the ability to regulate the multi-dimensional parameters of broadband microwave signals is improved, meeting the application requirements of electronic information systems such as radar and communication.
[0007] The present invention provides an all-optical regulation device for multi-dimensional parameters of broadband microwave signals, and the specific technical solution is as follows:
[0008] The device includes a direct current laser, a frequency and phase regulation unit, a delay regulation unit, an amplitude regulation unit, and a photodetector;
[0009] The frequency and phase regulation unit includes an optical power splitter, a phase modulator, a dual-parallel modulator, a driving source, and an optical coupler; the DC laser is connected to the optical power splitter, and the optical power splitter divides the received single-frequency laser into two paths and outputs them to the connected phase modulator and the dual-parallel modulator respectively; the phase modulator is also connected to the driving source, and the dual-parallel modulator also receives the input of the microwave signal;
[0010] The optical coupler is respectively connected to the modulation outputs of the phase modulator and the dual-parallel modulator, the coupled output of the optical coupler is connected to the delay regulation unit, the output of the delay regulation unit is connected to the amplitude regulation unit, and the output of the amplitude regulation unit is connected to the photodetector.
[0011] The DC laser is used to generate single-frequency laser as the light source of the entire device; the frequency and phase regulation unit is used to convert the input microwave signal into an optical carrier microwave signal and realize the frequency and phase regulation of the optical carrier microwave signal;
[0012] The delay regulation unit is used for the delay regulation of the optical carrier microwave signal; the amplitude regulation unit is used for the amplitude regulation of the optical carrier microwave signal; the photodetector is used to convert the optical carrier microwave signal into an output microwave signal;
[0013] Through this device structure, the frequency, phase, delay, and amplitude parameters of the output microwave signal can be regulated with respect to the input microwave signal.
[0014] Further, the driving signals output by the driving source include a periodic sawtooth wave signal, a DC signal with a set voltage, and a sawtooth wave signal superimposed with a DC bias voltage.
[0015] The frequency regulation of the optical carrier microwave signal is realized through the periodic sawtooth wave signal. The magnitude of the frequency shift value generated by the frequency regulation is determined by the repetition frequency of the periodic sawtooth wave signal, and the positive and negative of the frequency shift value generated by the frequency regulation are determined by the positive and negative change slopes of the periodic sawtooth wave;
[0016] The phase regulation of the optical carrier microwave signal is realized through the DC signal with a set voltage; the phase shift amount of the phase regulation is determined by the voltage magnitude of the DC signal;
[0017] The frequency regulation and phase regulation of the optical carrier microwave signal are realized through the sawtooth wave signal superimposed with a DC bias voltage.
[0018] Further, the power distribution relationship between the two outputs of the optical power splitter is that the optical signal powers output by the phase modulator and the dual-parallel modulator differ by no more than 1 time.
[0019] Further, the delay control unit includes a first optical switch, a second optical switch, and a plurality of tunable optical fiber delay lines with different delay parameters;
[0020] The first optical switch and the second optical switch are respectively connected through the tunable optical fiber delay lines to form a plurality of delay paths with different delays;
[0021] The first optical switch and the second optical switch also include a zero-delay path connected directly;
[0022] The first optical switch and the second optical switch are also connected to a control signal input. The delay paths are controlled to conduct through the control signal. The zero-delay path and the plurality of delay paths with different delays form a tunable delay path structure based on the control signal.
[0023] Further, the amplitude control unit includes an optical amplifier. The optical amplifier is connected to the output of the delay control unit, and the output of the optical amplifier is connected to the photodetector.
[0024] The optical carrier microwave signal is amplified by the optical amplifier to enhance the amplitude of the optical carrier microwave signal.
[0025] Further, the amplitude control unit includes a tunable optical attenuator. The tunable optical attenuator is connected to the output of the delay control unit, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input.
[0026] The optical carrier microwave signal is attenuated by the tunable optical attenuator to weaken the amplitude of the optical carrier microwave signal. The attenuation amount generated by the tunable optical attenuator can be changed according to the external control signal.
[0027] Further, the amplitude control unit includes an optical amplifier and a tunable optical attenuator. The optical amplifier is connected to the output of the delay control unit, the output of the optical amplifier is connected to the tunable optical attenuator, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input.
[0028] Through the combined connection structure of the optical amplifier and the tunable optical attenuator, the enhancement or attenuation of the amplitude of the optical carrier microwave signal can be achieved.
[0029] Based on the above device, the present invention also provides an all-optical control method for multi-dimensional parameters of broadband microwave signals. The specific process is as follows:
[0030] S1: The DC laser generates single-frequency laser and outputs it to the optical power splitter of the frequency and phase control unit;
[0031] S2: Obtain the insertion losses of the phase modulator and the dual-parallel modulator, and set the optical power distribution relationship according to the insertion losses;
[0032] S3: The phase modulator receives the drive signal input by the drive source and performs modulation output based on the drive signal; the dual-parallel modulator receives the microwave signal input from the outside and converts it into an optical carrier microwave signal for output, and combines and outputs the optical carrier microwave signals output by the phase modulator and the dual-parallel modulator;
[0033] S4: Perform delay control on the combined optical carrier signal;
[0034] S5: Perform amplitude control on the optical carrier signal after delay control;
[0035] S6: Input the optical carrier signal after amplitude control into the photodetector and output the microwave signal after multi-terminal control.
[0036] Further, in step S4, the delay amounts of the delay control include zero and non-zero.
[0037] Further, in step S5, the control amounts of the amplitude control include zero, gain, and attenuation.
[0038] The beneficial effects of the present invention are as follows:
[0039] The present invention uses optical processing, performs two-way power splitting output of unequal power on the optical signal through an optical power splitter, one path is modulated based on the drive signal through a phase modulator to obtain an optical carrier microwave signal, and the other path is converted based on the microwave signal input from the outside through a dual-parallel modulator to obtain an optical carrier microwave signal. After combining the two optical carrier signals, delay and amplitude adjustable processing are performed, and finally the microwave signal is output through a photodetector, realizing the joint control of the frequency, phase, delay, and amplitude parameters of the microwave signal. Compared with the prior art, it can adapt to microwave signals with a larger bandwidth, and because the optical signal transmission speed is very fast, based on the device structure, the signal can complete the signal processing process after passing through the device once, ensuring the signal processing speed and efficiency. Description of the Drawings
[0040] Figure 1 is a schematic diagram of the device architecture of the present invention.
[0041] Figure 2 is a schematic diagram of the method flow of the present invention. Detailed Embodiments
[0042] In the following description, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0043] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0044] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0045] Embodiment 1
[0046] Embodiment 1 of the present invention discloses an all-optical regulation device for multi-dimensional parameters of broadband microwave signals, as Figure 1 shown below:
[0047] The device includes a direct current laser, a frequency and phase regulation unit, a delay regulation unit, an amplitude regulation unit, and a photodetector.
[0048] The direct current laser is used to generate a single-frequency laser as the light source of the entire device;
[0049] Specifically, in this embodiment, the wavelength of the direct current laser is 1550 nm, and the output power is 40 mW (i.e., 16 dBm).
[0050] The frequency and phase regulation unit is used to convert the input microwave signal into an optical carrier microwave signal and implement frequency and phase regulation on the optical carrier microwave signal;
[0051] The delay control unit is used for delaying and controlling the optical carrier microwave signal; the amplitude control unit is used for amplitude controlling the optical carrier microwave signal; the photodetector is used for converting the optical carrier microwave signal into an output microwave signal.
[0052] The frequency and phase control unit includes an optical power splitter, a phase modulator, a dual parallel modulator, a driving source, and an optical coupler; the DC laser is connected to the optical power splitter, and the optical power splitter divides the received single-frequency laser into two paths and outputs them to the connected phase modulator and dual parallel modulator respectively; the phase modulator is also connected to the driving source, and the dual parallel modulator also receives the input of the microwave signal;
[0053] As a preferred embodiment, the power distribution relationship between the two outputs of the optical power splitter is selected and set according to the insertion losses of the phase modulator and the dual parallel modulator, with the aim of keeping the optical signal powers output by the phase modulator and the dual parallel modulator equal or close;
[0054] As a preferred embodiment, the power distribution relationship is set such that the difference in the optical signal powers output by the phase modulator and the dual parallel modulator does not exceed 1 time.
[0055] Specifically, in this embodiment, 30% of the optical power is distributed to one path and output to the phase modulator; 70% of the optical power is distributed to the other path and output to the dual parallel modulator.
[0056] As a preferred embodiment, the driving signal output by the driving source includes a periodic sawtooth wave signal, a DC signal with a set voltage, and a sawtooth wave signal superimposed with a DC bias voltage.
[0057] Frequency control of the optical carrier microwave signal is achieved through the periodic sawtooth wave signal. The magnitude of the frequency shift value generated by the frequency control is determined by the repetition frequency of the periodic sawtooth wave signal, and the positive or negative of the frequency shift value generated by the frequency control is determined by the positive or negative change slope of the periodic sawtooth wave;
[0058] According to different modulation requirements, different driving signals are input.
[0059] Phase control of the optical carrier microwave signal is achieved through the DC signal with a set voltage; the phase shift amount of the phase control is determined by the voltage magnitude of the DC signal;
[0060] Frequency control and phase control of the optical carrier microwave signal are achieved through the sawtooth wave signal superimposed with a DC bias voltage.
[0061] The optical coupler is respectively connected to the modulation outputs of the phase modulator and the dual-parallel modulator. The coupled output of the optical coupler is connected to the delay control unit. The output of the delay control unit is connected to the amplitude control unit. The output of the amplitude control unit is connected to the photodetector.
[0062] As a preferred embodiment, the delay control unit includes a first optical switch, a second optical switch, and N tunable fiber delay lines with different delay parameters.
[0063] Combined Figure 1 As shown, the first optical switch and the second optical switch are respectively connected through the tunable fiber delay lines to form several delay paths with different delays.
[0064] The first optical switch and the second optical switch also include a zero-delay path connected directly.
[0065] That is, the delay control unit includes N + 1 paths. Among them, N paths respectively include 1 tunable fiber delay line with different delay parameters, and 1 path does not include a fiber delay line.
[0066] The first optical switch and the second optical switch are also connected to an external control signal input. By controlling the signal, the delay path is turned on to achieve path selection. The zero-delay path and several delay paths with different delays form an adjustable delay path structure based on the control signal.
[0067] Specifically, the first optical switch selects a path for the input combined optical-carrier microwave signal according to the external control signal and outputs it to one of the N + 1 paths. When any one of the N tunable fiber delay lines is selected by the first optical switch, the combined output optical-carrier microwave signal is input to this tunable optical delay line. Under the action of the external control signal, this tunable optical delay line performs delay control on the combined optical-carrier microwave signal. When the first optical switch selects the path that does not include a fiber delay line, the combined optical-carrier microwave signal is not subjected to delay control.
[0068] The second optical switch selects one of the N + 1 paths according to the external control signal. Correspondingly, among them, N paths respectively include 1 tunable fiber delay line with different delay parameters, and 1 path does not include a fiber delay line. The path selected by the second optical switch is the same as the path selected by the first optical switch.
[0069] In this embodiment, the parameter of one of the tunable optical delay lines is recorded as a delay step of 2.5 ps and a delay bit of 8 bits. That is, the tunable fiber delay line 1 can provide several different delay values between 0 ps and 637.5 ps with a step of 2.5 ps.
[0070] As a preferred embodiment, the amplitude regulation unit includes an optical amplifier and / or a tunable optical attenuator;
[0071] When the amplitude regulation unit is an optical amplifier, the optical amplifier is connected to the output of the delay regulation unit, and the output of the optical amplifier is connected to the photodetector; the optical amplifier amplifies the optical microwave signal, so that the amplitude of the optical microwave signal is enhanced.
[0072] When the amplitude regulation unit is a tunable optical attenuator, the tunable optical attenuator is connected to the output of the delay regulation unit, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input; the tunable optical attenuator attenuates the optical microwave signal, so that the amplitude of the optical microwave signal is weakened. The attenuation amount generated by the tunable optical attenuator can be changed according to the external control signal.
[0073] When the amplitude regulation unit includes an optical amplifier and a tunable optical attenuator, the optical amplifier is connected to the output of the delay regulation unit, the output of the optical amplifier is connected to the tunable optical attenuator, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input; through the combined connection structure of the optical amplifier and the tunable optical attenuator, the enhancement or attenuation of the amplitude of the optical microwave signal can be realized.
[0074] Specifically, the optical amplifier can be of fixed gain or variable gain. When the amplifier is of variable gain type, its gain value is determined by the amplitude regulation result specifically required; the attenuation value of the tunable optical attenuator is determined by the amplitude regulation effect specifically required.
[0075] In this embodiment, the optical amplifier is of fixed gain type, providing a gain of 15 dB, the attenuation step of the tunable optical attenuator is 1 dB, and the attenuation range is 30 dB; through the combination of the optical amplifier and the tunable optical attenuator, power regulation with a step of 1 dB and a range of -15 dB to +15 dB can be achieved. For example, the parameters of the optical amplifier and the tunable optical attenuator are adjusted so that the amplitude of the finally photoelectrically converted microwave signal is reduced by half compared to the input microwave signal.
[0076] Through the device structure described in this embodiment, the frequency, phase, delay, and amplitude parameters of the output microwave signal can be regulated relative to the input microwave signal.
[0077] Specifically, in this embodiment, based on the above amplification attenuation parameters, with the frequency of the externally input microwave signal being 10 GHz, the drive source inputs a periodic sawtooth wave signal with a repetition frequency of 20 kHz for the first time, without a DC bias voltage. The delay adjustment amount is selected as 160 ps. After being processed by the device in this embodiment, the output microwave signal has a frequency offset of 20 kHz relative to the input initial microwave signal, without phase adjustment, a delay of 160 ps is generated (except for the signal delay deliberately introduced by humans, the fixed delay introduced by the inherent transmission path in the device can be corrected by the system and can therefore be considered not included), and the amplitude is reduced by half.
[0078] Embodiment 2
[0079] Embodiment 2 of the present invention discloses an all-optical control method for multi-dimensional parameters of broadband microwave signals based on Embodiment 1 above, as Figure 2 shown, the specific step flow is as follows:
[0080] S1: The DC laser generates single-frequency laser light and outputs it to the optical power splitter of the frequency and phase control unit;
[0081] Specifically, the DC laser can use a laser with a wavelength of 1550 nm, and the output power is set to 40 mW (i.e., 16 dBm).
[0082] S2: Obtain the insertion losses of the phase modulator and the dual-parallel modulator, and set the optical power distribution relationship according to the insertion losses;
[0083] As a preferred embodiment, the optical power distribution relationship makes the optical signal powers output by the phase modulator and the dual-parallel modulator differ by no more than 1 time;
[0084] Specifically, the optical power splitter distributes 30% of the optical power to one path and outputs it to the phase modulator; the other path distributes 70% of the optical power and outputs it to the dual-parallel modulator.
[0085] S3: The phase modulator receives the drive signal input by the drive source and performs modulation and output based on the drive signal; the dual-parallel modulator receives the externally input microwave signal and converts it into an optical carrier signal for output, and combines and outputs the optical carrier signals output by the phase modulator and the dual-parallel modulator;
[0086] In this embodiment, when frequency regulation of the optical carrier microwave signal is required, the driving signal is a periodic sawtooth wave signal. The repetition frequency of the periodic sawtooth wave signal determines the frequency shift value required for frequency regulation, and the positive and negative change slopes of the periodic sawtooth wave signal determine the positive and negative relationship of the frequency shift value for frequency regulation. When phase regulation of the optical carrier microwave signal is required, the driving signal is a DC signal with a specific voltage, and the voltage magnitude of the DC signal determines the phase shift amount for phase regulation. When both frequency regulation and phase regulation of the optical carrier microwave signal are required, the driving signal is a sawtooth wave signal superimposed with a DC bias voltage.
[0087] Specifically, if the driving source does not output a driving signal, no frequency and phase regulation are performed, and the optical coupler combines and outputs an optical carrier signal and a laser signal.
[0088] S4: Perform delay regulation on the combined and output optical carrier signal;
[0089] Based on the device described in Embodiment 1, the delay amount of the delay regulation includes zero and non-zero. That is, when the combined signal passes through one of the N adjustable fiber optic delay lines, the selected adjustable fiber optic delay line is controlled to change the delay amount. When the combined signal passes through a path that does not include a fiber optic delay line, no delay regulation is performed.
[0090] S5: Perform amplitude regulation on the optical carrier signal that has undergone delay regulation;
[0091] Based on the device described in Embodiment 1, the optical amplifier is used to amplify the power of the optical carrier microwave signal to achieve the effect of enhancing the amplitude of the optical carrier microwave signal, and the tunable optical attenuator is controlled to attenuate the power of the optical carrier microwave signal to achieve the effect of weakening the amplitude of the optical carrier microwave signal.
[0092] The specific gain value and attenuation value are determined by the amplitude regulation effect that needs to be achieved specifically. The regulation amount of the amplitude regulation includes zero, gain, and attenuation. Specifically, if the attenuation value of the tunable optical attenuator is adjusted to exactly offset the gain value of the optical amplifier, no amplitude regulation is performed.
[0093] S6: Input the optical carrier signal that has undergone amplitude regulation into the photodetector to output the microwave signal after multi-terminal regulation. Compared with the original microwave signal input in Step 3, the frequency, phase, delay, and amplitude parameters of the finally output microwave signal have all been regulated.
[0094] The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new feature disclosed in this specification or any new combination, as well as any new method or process step disclosed or any new combination.
Claims
1. An all-optical control device for multi-dimensional parameters of broadband microwave signals, characterized in that: It includes a DC laser, a frequency and phase control unit, a delay control unit, an amplitude control unit and a photoelectric detector; The frequency phase control unit includes an optical power divider, a phase modulator, a dual parallel modulator, a driving source and an optical coupler; the DC laser is connected to the optical power divider, and the optical power divider divides the received single-frequency laser into two paths, which are respectively output to the connected phase modulator and the dual parallel modulator; the phase modulator is also connected to the driving source, and the dual parallel modulator also receives an input of a microwave signal; The optical coupler is connected to the modulation outputs of the phase modulator and the dual parallel modulator respectively, the coupling output of the optical coupler is connected to the delay control unit, the output of the delay control unit is connected to the amplitude control unit, and the output of the amplitude control unit is connected to the photodetector.
2. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The driving signal output by the driving source includes a periodic sawtooth wave signal, a DC signal of a set voltage, or a sawtooth wave signal superimposed with a DC bias voltage.
3. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The power distribution relationship of the two outputs of the optical power splitter is that the difference between the optical signal powers output by the phase modulator and the dual parallel modulator does not exceed 1 times.
4. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The delay control unit includes a first optical switch, a second optical switch and a plurality of adjustable optical fiber delay lines with different delay parameters; The first optical switch and the second optical switch are respectively connected through the adjustable optical fiber delay line to form a plurality of delay paths with different delays; The first optical switch and the second optical switch further include a directly connected zero-delay path; The first optical switch and the second optical switch are also connected to a control signal input, and the delay path is controlled to be turned on by the control signal. The zero delay path and several delay paths with different delays constitute an adjustable delay path structure based on the control signal.
5. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The amplitude control unit includes an optical amplifier, the optical amplifier is connected to the output of the delay control unit, and the output of the optical amplifier is connected to the photodetector.
6. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The amplitude control unit comprises a tunable optical attenuator, which is connected to the output of the delay control unit, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input.
7. The all-optical control device for multi-dimensional parameters of broadband microwave signals according to claim 1, characterized in that: The amplitude control unit includes an optical amplifier and a tunable optical attenuator. The optical amplifier is connected to the output of the delay control unit, the output of the optical amplifier is connected to the tunable optical attenuator, and the output of the tunable optical attenuator is connected to the photodetector; the tunable optical attenuator is also connected to an external control signal input.
8. An all-optical control method for multi-dimensional parameters of broadband microwave signals, characterized in that: The all-light control device according to any one of claims 1 to 7 comprises: S1: A DC laser generates a single-frequency laser and outputs it to the optical power divider of the frequency and phase control unit; S2: Obtain insertion losses of the phase modulator and the dual parallel modulator, and set an optical power allocation relationship according to the insertion losses; S3: The phase modulator receives a driving signal input from a driving source and modulates and outputs the signal based on the driving signal; the dual parallel modulator receives an external microwave signal and converts the signal into an optical carrier signal for output, and the optical carrier signals output by the phase modulator and the dual parallel modulator are combined and output; S4: Delay control of the optical carrier signal output by the combined circuit; S5: performing amplitude control on the optical carrier signal after delay control; S6: Input the amplitude-controlled optical carrier signal into the photodetector, and output a microwave signal after multi-dimensional parameter control.
9. The all-optical control method of multi-dimensional parameters of broadband microwave signals according to claim 8, characterized in that: In step S4, the delay amount of the delay control includes zero and non-zero.
10. The all-optical control method of multi-dimensional parameters of broadband microwave signals according to claim 8, characterized in that: In step S5, the control amount of the amplitude control includes zero, gain and attenuation.