336 results about "Optical attenuator" patented technology

The invention relates to the technical field of optical fiber monitoring and maintenance, and discloses an optical fiber monitoring method, device and equipment, a storage medium and a computer program product, and the method comprises the steps: enabling pulse light of a preset period to be coupled into a to-be-detected low-loss optical fiber based on an optical fiber amplifier and a variable optical attenuator, and generating a backward scattering light signal; converting the backward scattering light signal into an electric pulse signal by using a single-photon detector, and counting the electric pulse signal by using a preset period as a period through a synchronous clock to obtain a counting result; adjusting the power of the variable optical attenuator according to a counting result, and drawing a target signal curve of the to-be-measured low-loss optical fiber based on an adjustment result; and analyzing the target signal curve to obtain a monitoring result of the to-be-measured low-loss optical fiber. The power is dynamically adjusted in different measurement sections, and the multi-section measurement results are superposed, so that the dynamic range of the single-photon optical time domain reflectometer is remarkably expanded, and the loss and dead pixels of the low-loss optical fiber can be reflected more comprehensively and accurately.

An optical receiver comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to an optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a TIA with a large dynamic range and provides for fast switching. The optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention relates to the technical field of optical fiber communication, in particular to an FTTR modulation and test system which comprises an optical port modulation and test subsystem and a flow test subsystem. The optical modem test subsystem comprises a multi-channel optical modem test assembly and an extinction ratio tester; the multi-channel optical modem test assembly comprises an optical comprehensive test instrument, a one-to-two optical splitter, a clock data recovery instrument, an optical oscilloscope, a bit error tester and an upper computer. The N to-be-tested optical modems and the extinction ratio tester are electrically connected to the upper computer; the flow test subsystem comprises a network tester, OLT optical access equipment and a plurality of groups of flow test loops arranged between the network tester and the OLT optical access equipment, and each flow test loop comprises a first optical power meter, a first optical attenuator, an optical modem to be tested, a second optical power meter, a second optical attenuator and an accompanying optical modem. According to the invention, the production cost of the optical port debugging and testing process can be reduced.

The invention discloses a high-resolution fast compressed sensing single photon array imaging system and method, and relates to the technical field of weak light imaging and computational imaging. The system comprises an imaging light source, an optical attenuator, a light beam expander, a to-be-detected target, a signal generator, a spatial light modulator, a single photon detection array, a counting storage module and a data processing module. Wherein the imaging light source is used for emitting a light beam to illuminate a target scene to be imaged; the optical attenuator, the light beam expander, the target to be measured and the spatial light modulator are sequentially arranged on a transmission light path of a light beam; the signal generator is respectively connected with the spatial light modulator and the single photon detection array; and the single photon detection array, the counting storage module and the data processing module are connected in sequence. According to the invention, the problem that the measurement mask is difficult to manufacture and store due to overlarge reconstruction resolution can be solved, and the imaging resolution and the imaging rate are improved.

The invention relates to the technical field of communication, and discloses an intelligent diagnosis and rapid recovery method, system and device for optical path faults and a medium. The method comprises the following steps: carrying out grading processing on a data set to obtain optical path fault grade data, carrying out amplifier power adjustment through segmented gain compensation to obtain an optical power adjustment instruction, carrying out optical power compensation through an adjustable optical attenuator to obtain an optical path balance parameter, and carrying out optical power distribution equalization through power gradient calculation to obtain optical path fault grade data. Comprising inter-node power difference calculation and node power correction, power control data is obtained, finally, parameter correction is carried out through stability evaluation, power fluctuation range verification and system margin calculation are carried out, and an optical path regulation and control scheme is obtained. According to the invention, the rapid diagnosis and automatic recovery of the optical path fault are realized, the fault recovery time is improved from an hour level to a minute level, and the stability and reliability of the optical path power are ensured at the same time.

The invention discloses an all-fiber cantilever beam type photoacoustic spectrometry gas detection system based on a microwave photon technology, which belongs to the field of photoacoustic spectrometry gas detection and comprises an F-P (Fabry-Perot) fiber sensor, a pump laser, an MZM (Mach Zehnder Modulator) modulator, a vector network analyzer, a coupler, a variable optical attenuator, a photoelectric detector and a reflector, the pump laser is connected with the input end of the MZM modulator, the output end of the MZM modulator is connected with the coupling input end of the coupler, the first output end of the coupler is connected with the reflector through the variable optical attenuator, and the coupling output end of the coupler is connected with the vector network analyzer through the photoelectric detector. According to the all-fiber cantilever beam type photoacoustic spectrometry gas detection system based on the microwave photon technology, the problems that a traditional diaphragm type F-P interference cantilever beam is large in size, low in sensitivity and greatly affected by temperature are solved, and the signal-to-noise ratio of a detection signal is increased; in addition, the establishment of the microwave photonic link enhances the resolution and speed of signal detection.

The invention discloses a laser radar echo signal simulator performance parameter testing method and device, and belongs to the field of photoelectric information. The system comprises a simulation distance related parameter measuring device, a working wavelength measuring device, a view field and distortion measuring device, an output power related parameter measuring device, a scanning speed and frame frequency and waveform similarity measuring device, an angular resolution measuring device and a simulator position adjusting device. The view field and distortion testing device is composed of a camera, an adjusting frame and a hemispherical guide rail. The scanning speed and frame frequency measuring device is composed of a focusing lens, two photoelectric detectors and an oscilloscope. The output power related parameter measuring device is composed of a focusing lens and a power meter. The working wavelength measuring device is composed of a focusing lens, an optical attenuator and a wavemeter. The placing position of the simulator on the platform is preset in advance through the simulator position adjusting device, and the simulator is sent to a specified testing position by driving the adjusting frame and the simulator to slide on the guide rail.

The utility model relates to the technical field of optical fiber communication, and discloses a polarization equalization transmitting assembly based on a coherent light silicon optical chip, which adopts a second optical splitter with an adjustable splitting ratio to split input continuous light and equalizes output light power of two paths of coherent light of X polarized light and Y polarized light. The two paths of coherent light of X polarized light and Y polarized light can be pre-adjusted only by adjusting the splitting ratio of the second optical splitter, optical power balance is achieved, high-speed electro-optical modulators in the two paths of coherent light do not need to be adjusted, the high-speed electro-optical modulators can be kept in the optimal state, an adjustable optical attenuator does not need to be additionally arranged in the two paths of coherent light, and the optical power balance is achieved. The utility model has the effects of improving the output power of the transmitting assembly, reducing the self power consumption of the transmitting assembly and improving the utilization efficiency of the high-speed photoelectric driver, and is more suitable for a small-sized packaged coherent optical module based on a coherent optical silicon optical chip.

The invention provides a high-parallelism test method of an optical comprehensive test platform, relates to the field of active optical testing, and aims to realize parallel testing of multiple tested objects or multiple test items through N independent test channels, avoid waiting time of traditional serial testing, and effectively improve manufacturing efficiency by combining the high-parallelism characteristic of the platform. Dynamic resource scheduling distributes tasks based on channel resource states monitored in real time, resource idling is avoided, the characteristic of high integration of a platform is matched, multiple modules share the platform, cost is effectively shared, the overall utilization rate of equipment is improved, modules such as optical power meters and variable optical attenuators integrated in all channels in a hardware architecture support hot plugging, and the overall performance of the equipment is improved. And the task analysis algorithm can flexibly map test items, adapt to requirements of different tested objects, conform to the advantages that the platform is matched as needed and easy to expand, can protect investment and adapt to dynamic changes of a test scene, and a distributed data acquisition mechanism synchronously acquires data of each channel and provides support for generating a reliable test report.

The invention provides an MEMS chip packaging assembly and an MEMS variable optical attenuator. The MEMS chip packaging assembly comprises a mounting seat, a first chip, a second chip, a third chip and a fourth chip, the tube seat is fixedly connected with the mounting seat; the first pin penetrates through the mounting seat and the tube seat and is flush with the surface of one side, opposite to the mounting seat, of the tube seat; the second pin is fixedly connected with the mounting seat; the insulating carrier is provided with a first surface and a second surface which are opposite to each other, the first surface is provided with a first conducting layer, the second surface is provided with a second conducting layer, the side edge of the insulating carrier is provided with a third conducting layer connected with the two conducting layers, and a placing groove penetrating through the first surface and the second surface is formed and penetrates through the side edge of the insulating carrier; one part of the first pin is contacted with the first conductive layer, and the other part is exposed out of the placing groove; the protective resistor is inserted into the placing groove, one part is connected with the first pin, and the other part is connected with the tube socket; the positive electrode of the MEMS chip is connected with the second surface of the insulating carrier and is in contact with the second conductive layer, and the negative electrode is connected with the tube socket; and the pipe cap covers the MEMS chip and is connected with the mounting seat.

The invention provides a reference light polarization multiplexing TF-QKD device and a coding method, and relates to the technical field of quantum communication. A light source emitted by a single-wavelength laser is subjected to time division multiplexing modulation through a phase modulator, an intensity modulator and a polarization modulator to obtain a strong phase reference light pulse, a weak phase reference light pulse and a quantum signal light pulse; after being attenuated by the optical attenuator, the signals are sent to a detection end through an optical fiber line; after light pulses of an Alice end and a Bob end received by a detection end pass through respective links, the light pulses are modulated by polarization controllers of respective light paths and then enter a light interference module for interference, the interfered light is divided into two beams, and the two beams respectively enter a first polarization beam splitter and a second polarization beam splitter for polarization; the light split by each polarization beam splitter respectively enters two avalanche detectors for detection, and the detection result is sent to a synchronous counter to ensure that the pulse arrival time of the Alice end is consistent with the pulse arrival time of the Bob end.

The invention discloses an OPGW optical cable lightning stroke positioning monitoring system and monitoring method based on distributed optical fiber sensing. Comprising a DFB laser, a first optical coupler, an acoustic optical modulator, a pulse signal generator, a scrambler, a first EDFA optical amplifier, a first optical isolator, an optical circulator, an FBG filter, an OPGW sensing optical cable, an electro-optical modulator, a microwave signal generator, a polarization regulator, a second EDFA optical amplifier, a second optical isolator, a second optical coupler and a variable optical attenuator which are connected in sequence. A third optical coupler, a balance detector, a low-frequency amplifier and a data processing module. The system can quickly and accurately position the lightning stroke position of the OPGW optical cable by measuring the Brillouin scattering frequency shift and the vibration state of the scattering signal.

The invention discloses an electrically-controlled variable optical attenuator based on a multistage wedge-shaped liquid crystal box and an attenuation control method, the attenuator comprises a laser, the laser provides an incident light signal, the divergent incident light signal is converted into a collimated parallel light beam through a collimator, the collimated parallel light beam is subjected to deflection modulation through a multistage wedge-shaped liquid crystal box module, and the modulated light beam is converted into a modulated light beam; the multi-channel liquid crystal controller is coupled to the output optical fiber through the optical fiber coupler, and generates and outputs driving voltage signals capable of being independently adjusted to the N-stage wedge-shaped liquid crystal box module, so that each wedge-shaped liquid crystal box in the multi-stage wedge-shaped liquid crystal box module is independently controlled; the control method comprises the steps of receiving a target instruction, querying a system-level relationship, distributing a deflection task, querying a device-level relationship, outputting a driving signal and performing closed-loop feedback correction. According to the invention, a large attenuation range is obtained, and at the same time, millisecond-level and even sub-millisecond-level rapid response is realized; the precision, the linearity and the usability of attenuation control are improved, and the control complexity is reduced.

The invention relates to the technical field of photoelectric precision instruments, and particularly discloses medical beauty femtosecond laser equipment and a processing method thereof. The device integrates a femtosecond laser, an automatic optical attenuator, an SLM spatial light modulator, a lens system, a CCD camera, an image processing unit and a control unit, and realizes high-precision and personalized improvement of a target object. According to the device, a laser beam is generated through a femtosecond laser, energy is adjusted through an automatic optical attenuator, the phase is modulated through an SLM spatial light modulator to form a multi-focus pattern array, and finally the multi-focus pattern array is tightly focused to a target object through a lens system. The CCD camera shoots an image of a target object, the image processing unit acquires depth information, and the control unit adjusts laser beam parameters according to the information, so that personalized improvement is realized. The machining method comprises the steps of laser beam generation, attenuation, phase modulation, focusing, image shooting and processing, parameter adjustment and the like, and the improved accuracy and safety are ensured.

The invention relates to a monolithic integrated wide-narrow passband reconfigurable electro-optical modulator, and belongs to the field of electro-optical modulators. The optical modulator comprises a substrate, and a tunable optical splitter, a dual-output intensity modulator, a phase modulator, a tunable optical attenuator, a first optical combiner and a second optical combiner which are integrated on the substrate. Wherein the input end of the tunable optical splitter receives an input optical signal, and the output end of the tunable optical splitter is respectively connected with the input ends of the dual-output intensity modulator and the phase modulator; the first output end of the dual-output intensity modulator is connected with the input end of the second optical combiner, and the second output end of the dual-output intensity modulator is connected with the input end of the tunable optical attenuator; the output end of the phase modulator and the output end of the tunable optical attenuator are both connected with the input end of the first optical combiner, and the output end of the first optical combiner is connected with the input end of the second optical combiner. And the output end of the second optical combiner outputs a modulated optical signal.

Silicon Photonics is a candidate technology for adding integrated optics functionality, either passive or active optical waveguides) to integrated circuits by leveraging the economies of scale of the CMOS microelectronics industry and using materials for the waveguide core such as silicon nitride (SiXNY) and silicon oxynitride (SiOXN1-X) for example. Microelectromechanical systems (MEMS) provide for movable platforms relative to the substrate allowing additional functionality to be added to a silicon circuit but also Silicon Photonics. Accordingly, by combining “fixed” waveguides formed upon the substrate with “movable” waveguides formed upon one or more movable platforms the inventors have established a series of Integrated Optics MEMS (IO-MEMS) based on Silicon Photonics. Such IO-MEMS include optical switches, optical attenuators, optical gates, optical switch matrices, configurable wavelength division multiplexer / demultiplexer devices, etc. exploiting both platforms and deformable beams.

The present application provides a laser generation circuit and an erbium-doped fiber amplifier, relating to the field of optical communication technologies. The jitter signal generation circuit includes: a jitter signal module, an analog signal module, and a clock signal module; the first input end of the jitter signal module is connected to the output end of the analog signal module, the control end of the jitter signal module is connected to the output end of the clock signal module, and the output end of the jitter signal module is used to output a jitter signal. By connecting the jitter signal module to the analog signal module and the clock signal module respectively, the present application can adjust the amplitude of the analog signal output by the analog signal module to achieve the adjustment of the amplitude of the jitter signal, and can adjust the frequency of the clock signal output by the clock signal module to complete the adjustment of the frequency of the jitter signal, so as to be compatible with lasers provided by multiple manufacturers, without adding optical attenuation devices at the output end of the laser, and effectively reducing the cost of preparing the EDFA.

The invention discloses a single-carrier frequency domain equalization CV-QKD system and method. The single-carrier frequency domain equalization CV-QKD system comprises an Alice laser, an IQ modulator, a quantum key generation module, an optical attenuator, an optical fiber channel, a Bob laser, an optical coupler, a balance detector, a quantum key demodulation module, an Alice post-processing module and a Bob post-processing module. At the Alice end, the Alice laser, the IQ modulator, the optical attenuator and the optical fiber channel are in optical fiber connection, the quantum key generation module is electrically connected with the IQ modulator, and the quantum key generation module is in data connection with the Alice post-processing module; at the Bob end, the Bob laser, the optical coupler, the balance detector and the optical fiber channel are in optical fiber connection, the quantum key demodulation module is electrically connected with the balance detector, and the quantum key demodulation module is in data connection with the Bob post-processing module. The secure transmission performance of the high-speed CV-QKD system is remarkably improved, and the multi-effect noise compensation cost of the high-speed CV-QKD system is effectively reduced.

The present invention discloses a quantum random number generator chip and design method. The chip includes: an optical chip, a transimpedance amplifier chip, and a microcontroller chip connected in sequence, wherein: the optical chip includes a continuous laser, an optical beam splitter, a first optical attenuator, a second optical attenuator, a first photodetector, and a second photodetector; the microcontroller chip includes a first digital-to-analog converter, a second digital-to-analog converter, an analog-to-digital converter, and a processor; the transimpedance amplifier chip includes a transimpedance amplifier; wherein the optical chip, the transimpedance amplifier chip, and the microcontroller chip are packaged to obtain a quantum random number generator chip. The present invention packages the optical chip and the microcontroller chip into a single chip through a systematic packaging method, significantly reducing the size of the quantum random number system, greatly improving the stability of the system and structure, while reducing power consumption and cost, and expanding the scope and application scenarios.

The invention relates to a power industry Ethernet switch optical port test system, method, device and equipment, a storage medium and a program product, and relates to the technical field of optical fiber communication. The system can improve the power industry Ethernet switch optical port test efficiency. The system comprises a test environment control module, a network tester, a variable optical attenuator and a switch to be tested. The test environment control module configures the network tester, the variable optical attenuator and the switch to be tested according to the configuration information; the network tester generates a network test message under the target test case, and records a receiving and sending statistical result of the network test message; the adjustable optical attenuator records and displays the adjusted optical attenuation parameters; the to-be-tested switch realizes a switch optical port function under the target test case, and collects an optical power value in an optical port test process; and the test environment control module summarizes and analyzes the receiving and transmitting statistical result, the optical attenuation parameter and the optical power value, and outputs a test result information set of the target test case.

The invention relates to the technical field of optical fiber sensing, and discloses a distributed optical fiber temperature sensing system based on photon counting and a measurement method, which can remarkably improve the sensing distance, the spatial resolution and the spatial positioning precision. According to the scheme, the method comprises the following steps: aiming at different segments of a sensing optical fiber, controlling the attenuation amount of a variable optical attenuator, and carrying out detection and time-dependent single photon counting on backscattered light from different segments on the sensing optical fiber by utilizing a single photon avalanche diode and a time-dependent single photon counter, and temperature distribution information of the sensing optical fiber is demodulated based on a time correlation single photon counting result.

The invention provides a C + L wave band optical fiber amplification module and an optical fiber laser. The C + L wave band optical fiber amplification module comprises a first bidirectional pumping unit, a gain flattening filter, a variable optical attenuator and a second bidirectional pumping unit, a first gain optical fiber of the first bidirectional pumping unit adopts a three-section splicing structure formed by sequentially welding a first bismuth-doped optical fiber, an erbium-doped optical fiber and a second bismuth-doped optical fiber along a signal transmission direction, and a second gain optical fiber of the second bidirectional pumping unit is a bismuth-erbium co-doped optical fiber; wherein the first bidirectional pumping unit is used for performing primary amplification on C + L wave band seed light to generate first signal light; and the second bidirectional pumping unit is used for performing secondary amplification on the adjusted first signal light to generate second signal light. According to the invention, low-noise, high-gain and high-flatness C + L wave band amplification signals can be output.

A burst-mode optical receiver for an optical line terminal (OLT) of a passive optical network (PON) comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to a burst-mode optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a burst-mode TIA with a large dynamic range and provides for fast switching. The burst-mode optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention discloses a displacement measurement method and system based on orbital angular momentum light beam conjugate interference, and the method comprises the steps: enabling linearly polarized light emitted by a laser to pass through an optical attenuator, a light beam expander, a quarter-wave plate and a vortex wave plate to form a light beam with orbital angular momentum, and enabling the light beam to pass through a beam splitter to be divided into a reference light beam and a measurement light beam. A measurement light beam is vertically incident on a reflection grating, and the mth-order diffraction light is incident on a first cube-corner prism and is reflected back to a diffraction grating to be subjected to secondary diffraction. And after the reference beam passes through the second cube-corner prism, the topological charge symbol of the reference beam is changed by the Dove prism. The reference light beam and the measurement light beam generate conjugate interference at the beam splitter prism, a petal-shaped interference pattern collected by the CCD is demodulated, and in-plane and out-of-plane two-dimensional displacement of the grating is calculated. The system has the characteristics of simple and compact structure, strong anti-interference capability, high precision and the like, and can be widely applied to the fields of high-end equipment manufacturing, semiconductor industry, precision metering and the like.

The invention discloses an automatic test system for a QSFP28 interface optical module, which comprises a computer, a QSFP28 test board, a standard optical module, an optical module to be tested, an optical attenuator, an optical power meter, a bit error tester, an oscilloscope and an optical splitter, the standard optical module provides an optical signal and transmits the optical signal to a receiving end of the to-be-tested optical module, and the to-be-tested optical module receives the instruction and the data transmitted by the QSFP28 test board and correspondingly modifies a register of the to-be-tested optical module according to the corresponding instruction and the data. According to the automatic test system and test method for the QSFP28 interface optical module, operation of a measuring instrument and writing of register parameters of the optical module are controlled through the system, automatic test of the optical module to be tested is achieved, the workload of workers is greatly reduced, the consistency of the performance of the optical module is ensured, and the production efficiency is improved.

The invention provides a self-calibration high-strength optical fiber hydrophone based on an end face reflection principle, and relates to the technical field of hydrophones. Comprising the steps that a laser light source emits a first laser beam, and an optical fiber isolator suppresses reflection and outputs a second laser beam. And the optical fiber variable optical attenuator adjusts the incident power and outputs a third laser beam. The 1 * 2 optical fiber coupler splits the laser beam into a fourth laser beam and a fifth laser beam, and the first photoelectric detector monitors power. The optical fiber circulator transmits the fifth laser beam to the optical fiber sensing module, generates reflected light and transmits the reflected light to the second photoelectric detector, and the second photoelectric detector converts the reflected light into a voltage signal. The data acquisition card acquires the signals, the signal demodulation processing unit calculates sound pressure sensitivity according to a mapping relation formula of the voltage signals and sound pressure, and the standard voltage module provides standard voltage for the data acquisition card. The problem that in the prior art, a high-strength hydrophone cannot be repeatedly used and cannot be self-calibrated after being damaged is solved.

An optical module includes an optical connector port, a plurality of variable optical attenuators, a first polarization controller, and an output port. The optical connector port connects to an optical port on a line card and receives a plurality of input optical signals from the line card when the optical connector port is connected to the optical port on the line card. The plurality of variable optical attenuators produce a plurality of attenuated optical signals based on the plurality of input optical signals. The first polarization controller produces a plurality of output optical signals based on the plurality of attenuated optical signals. The output port outputs the plurality of output optical signals.

The invention discloses a single-polarization self-coherent optical communication system and a polarization control method thereof, and relates to the field of optical fiber communication. The single-polarization self-coherent optical communication system mainly comprises a laser, a first polarization controller, an IQ modulator, a digital-to-analog converter, a second polarization controller, a polarization beam combiner, a lithium niobate polarization controller, a polarization beam splitter, a polarization-maintaining coupler, a coherent receiver, a variable optical attenuator, an avalanche photodiode and an analog-to-digital converter. By implementing the single-polarization self-coherent optical communication system and the polarization control method thereof provided by the invention, the complexity of a DSP (Digital Signal Processor) algorithm can be reduced, the power consumption and the cost of the system are reduced, and the stability of the system is improved.

The application provides a semiconductor laser reservoir pool computing device based on silicon-based micro-resonant cavity optical feedback, and belongs to the technical field of photonic neuromorphic computing. Laser output by a driving laser is modulated by a phase modulator, and then is injected into a response semiconductor laser through a feedback cavity incoupler and a circulator; the output end of the response semiconductor laser is connected to an optical circulator in sequence through a second variable optical attenuator, a polarization controller, a silicon-based micro-resonator and a first variable optical attenuator, so as to form a silicon-based micro-resonator optical feedback loop; the output end of the feedback cavity incoupler is connected to a broadband photodetector, which is used to collect reservoir pool output signals; the phase modulator is loaded with a modulation signal containing an input signal and a random mask, so as to realize input layer signal coding. The application realizes the improvement of overall computing performance.

The utility model relates to the technical field of laser application, in particular to a laser frequency stabilization device based on an etalon frequency measurement technology, which comprises a laser emission unit, a frequency detection unit, a frequency stabilization laser output end and a master control adjusting unit, the frequency detection unit comprises an optical splitter, an optical attenuator, a first photoelectric detector, an etalon and a second photoelectric detector. An etalon in the frequency detection unit is used as a frequency reference, an optical attenuator is arranged to reduce temperature rise and improve precision, a first photoelectric detector and a second photoelectric detector are used to provide a frequency measurement error signal and a reference signal, and the master control adjustment unit is used to carry out analysis and calculation according to the error measurement signal and the reference signal. And the laser emitting unit adjusts the laser frequency according to the adjusting signal, so that the frequency stabilization adjustment of the laser is realized.