266 results about "Laser frequency" patented technology

The invention discloses a laser frequency stabilization system based on Faraday anomalous dispersion atomic filtering, which is used for carrying out frequency stabilization on phase modulation multi-sideband laser, and comprises a frequency doubling laser unit which is configured to comprise a fundamental frequency seed light source, an electro-optical modulator, a fundamental frequency amplifier and a frequency doubling crystal; the light splitting module unit is configured to split the frequency doubling light into a main output light path and a monitoring light path; the atomic optical rotation filter is located on the monitoring light path and is configured to maintain the purity of the frequency-stabilized laser spectrum through purification treatment under the control of the axial magnetic field and the temperature; the frequency stabilization unit is configured to be a frequency stabilization light path and a servo system, and the frequency stabilization light path is used for obtaining laser frequency information and generating an error signal; the servo system is used for controlling the frequency of the fundamental frequency seed light source according to the error signal feedback. According to the laser frequency stabilization system provided by the invention, the spectrum purification and frequency stabilization precision can be improved, so that high-frequency stability locking is realized.

The invention discloses an on-line detection method for volatile organic compounds in waste gas, and belongs to the field of waste gas emission monitoring, the detection method comprises the following specific steps: I, starting a quantum cascade laser frequency comb of a middle infrared band, calibrating various parameters of the quantum cascade laser frequency comb, and ensuring to cover a characteristic absorption area of the volatile organic compounds in the waste gas; iI, inputting the waste gas into a gas detection chamber through a sampling pipeline, monitoring the state of the waste gas in real time, and dynamically adjusting the conditions of the gas detection chamber according to various collected signals; the device can capture instantaneous fluctuation of waste gas concentration in real time, meets the high-speed dynamic emission monitoring requirement, has extremely high coherence and narrow linewidth, can analyze tiny spectral line differences which cannot be distinguished by a traditional spectrograph, remarkably improves the detection precision and the recognition capability, ensures that a measurement result still keeps consistency and high reliability under different working conditions, and is suitable for large-scale popularization and application. The signal-to-noise ratio is obviously improved, the power drift is reduced, and long-time stable operation is realized.

The invention relates to the technical field of atomic frequency standards, in particular to a rubidium cold atom gas chamber-based two-photon transition optical frequency standard device, which comprises a two-photon transition clock laser system, a rubidium cold atom gas chamber, a cooling laser system, a sputtering ion pump and a rubidium source, wherein the two-photon transition clock laser system comprises a laser generation modulation light path, a laser power stabilization light path and a laser frequency control light path; the rubidium cold atom gas chamber is arranged behind the Glan-Taylor prism; the cooling laser system comprises a cooling laser, a second isolator, a second polarization beam splitter, a pumping light path, a re-pumping light path and a detection light path; the sputtering ion pump is connected with the rubidium cold atom gas chamber; and the rubidium source is connected with the rubidium cold atom gas chamber. The two lasers are utilized to obtain the two-photon transition signal, so that the rubidium atom two-photon transition light frequency standard with high stability is obtained, and the intensity of the two-photon transition fluorescence signal is improved.

The invention provides a temperature compensation method and device for laser frequency doubling, electronic equipment and a storage medium. The method comprises the steps that the initial temperature of a frequency doubling crystal of a frequency doubling laser is determined according to the power of input fundamental frequency light; adjusting the initial temperature, and determining a target temperature corresponding to the maximum value of the frequency-doubled optical power output by the frequency-doubled laser; according to the invention, active following compensation is carried out on the temperature of the frequency doubling crystal, and the temperature of the frequency doubling crystal is controlled at the target temperature, so that the active following compensation is carried out on the temperature of the frequency doubling crystal, thereby enabling the frequency doubling laser to maintain high output power, and further improving the frequency doubling efficiency of the crystal. Therefore, the laser frequency multiplier can quickly reach a steady state in the power switching process, and accurate dynamic control of the laser frequency multiplication system is realized.

The invention relates to a Rydberg atomic communication receiving system and method based on AT split peak value analysis, and belongs to the technical field of quantum communication. The system comprises a detection laser, a coupling laser, an AOM / EOM, a function generator, a high-frequency signal generator, a cesium atom gas chamber, a photoelectric detector, a lock-in amplifier, a data acquisition module and a microwave signal output module. The AOM / EOM modulates the frequency of the detection laser; the microwave signal output module generates an AM modulation microwave signal and transmits the AM modulation microwave signal to the cesium atom gas chamber, so that the target Rydberg state atoms generate an AT splitting effect to calibrate system parameters; the photoelectric detector and the lock-in amplifier obtain a first harmonic component based on the transmission light. During communication, the system is arranged in a microwave electric field received by communication, and the data acquisition and processing module outputs AM modulation microwave signals received by the recovered cesium atom gas chamber based on calibrated system parameters and phase locking. The method solves the problem of signal distortion existing in EIT-AT direct communication transmission and the problem of tedious operation of a heterodyne method.

The invention relates to a dual-frequency laser interference measurement system phase resolving method based on a digital phase-locked loop. According to the method, a reference signal is subjected to photoelectric conversion to generate a sampling clock, and a measurement signal is sampled according to the sampling clock. Phase data can be obtained by analyzing the sampled measurement signal. The technology has the advantages that the influence of laser frequency difference fluctuation is eliminated, high-precision real-time calculation of the phase of the double-frequency laser interferometer is realized, the calculation process is remarkably simplified, and resource occupation is reduced.

The invention provides a laser frequency stabilization device and method based on optical frequency shift, and relates to the field of laser frequency stabilization, and the device comprises a first slave laser, a first frequency stabilization system, a second slave laser, a second frequency stabilization system, a master laser, an acousto-optic modulation module, and a phase-locked frequency stabilization device. The first slave laser is used for emitting first laser of a first wavelength; the main laser is used for emitting third laser with a second wavelength; the first frequency stabilization system is used for locking the first laser according to the first laser to obtain first frequency-stabilized laser; the second slave laser is used for emitting second laser with the first wavelength; the second frequency stabilization system is used for locking the second laser to obtain second frequency-stabilized laser; the acousto-optic modulation module is arranged between the first slave laser and a light path of the phase-locked frequency stabilization equipment; and the phase-locking frequency stabilization equipment is used for receiving the first frequency stabilized laser and the second frequency stabilized laser and carrying out frequency locking on the third laser according to the first frequency stabilized laser and the second frequency stabilized laser. According to the invention, the modulation transfer spectrum and the optical frequency shift can be combined to complete frequency locking of the laser.

This invention provides a fast frequency closed-loop control method and system for an alkali metal atomic magnetometer laser, comprising: setting the laser current and laser temperature, calculating and obtaining the laser frequency closed-loop control signal SigX; and controlling the laser frequency based on the offset value of the frequency closed-loop control signal SigX and the correlation function f(I) = φ(I, SigX) between the current value and SigX. X The process involves calculating and obtaining the current adjustment value ΔI0, which is then directly applied to the laser current. The difference between the current adjustment value I1 and the set value I0 is calculated as ΔI1. Based on the correlation function f = φ(f(I), f(T)), the temperature change ΔT1 corresponding to the current change ΔI1 is calculated. This temperature adjustment ΔT1 is then applied to the laser temperature. By adjusting the laser temperature to T1, the laser current value is changed back from the adjustment value I1 to the initial set value I0. This invention addresses the problem in existing technologies where using laser current as a feedback signal for closed-loop control of laser frequency easily affects the laser's performance and consequently its lifespan.

The invention provides a frequency modulation laser ranging and vibration measurement common-path design method, which belongs to the technical field of laser measurement and comprises a measurement light path, an auxiliary light path and a calibration light path. The measuring light path comprises a single-frequency laser and a tuning continuous wave laser, beam combination, modulation and beam splitting of measuring light beams are achieved through components such as a coupler, a circulator, an acoustic optical modulator, a wavelength division multiplexer and a collimating lens, and finally signals are received by a photoelectric detector. The auxiliary optical path adopts a Mach-Zehnder interferometer structure, and uses an optical fiber disc to generate an optical path difference for auxiliary measurement. The calibration light path accurately calibrates the laser frequency through an etalon and a photoelectric detector. The design effectively improves the integration level, stability and measurement precision of the system through a common-path structure, and is suitable for high-precision laser ranging application.

The invention discloses an in-ring and out-ring matched single-arm locking system and method, and the method comprises the following steps: starting laser from a spacecraft A, and transmitting the laser to a spacecraft B and a spacecraft C; light transmitted to the spacecraft B and the spacecraft C through link delay is subjected to weak light phase locking and then returns; the returned laser is converged with non-delayed light of the spacecraft A after being subjected to link delay again; the converged light returned from the spacecraft B is fed back to the spacecraft A for in-loop suppression after passing through a feedback controller; and the converged light returned from the spacecraft C is subjected to out-of-loop phase output. According to the invention, a single-arm locking system with in-ring and out-ring matching is constructed by selecting a proper out-ring measurement point and adopting an in-ring suppression and out-ring measurement method. The effects that the laser frequency noise can be remarkably suppressed within the full-scientific frequency band range (0.1 mHz-1 Hz), and gravitational wave signals can be amplified while noise of other technologies is suppressed are achieved.

The application discloses an anti-interference pulse laser frequency division multiplexing optical coding wireless communication system and method, provides an optical wireless communication system based on pulse laser, and realizes an anti-interference pulse laser frequency division multiplexing optical coding communication method. Relying on the convergence effect of the light collector, a stable and anti-interference system receiving end is realized, the anti-interference capability of the whole system is realized through a pulse laser source and a multi-channel light splitting module, the utilization rate of the spectrum in the system communication process is improved, and the pulse laser transmission of frequency division multiplexing is realized.

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.

The application discloses a laser frequency modulation interferometer phase measurement error correction method, system and device, relates to the field of photoelectric precise measurement technology, and comprises the following steps: acquiring a laser frequency modulation interferometer quadrature phase measurement signal, and expressing the quadrature phase measurement signal by using a standard ellipse equation; defining variables in Kalman filtering, discretizing and normalizing the equation; acquiring a time update equation of a Kalman filter, and measurement noise covariance and process noise covariance according to the normalized standard ellipse equation; acquiring a phase measurement update equation; introducing four points in the vicinity of four axes of the ellipse to perform iterative fitting; initializing iteration by rotating the ellipse through scanning laser temperature; and correcting the quadrature phase measurement signal by using posterior estimation. According to the conversion relationship between the quadrature signal characteristics and the ellipse parameters, the unequal amplitude and the bias of the quadrature signal are corrected in real time, so that the correction of the nonlinear error of the phase measurement is finally realized.

The application relates to the technical field of magnetometers, and discloses a magnetic force sensor system based on free induction decay and a use method thereof.The sensor system comprises a laser generator, an atomic gas chamber, a strong magnetic field generator, a polarizer, an analyzer, and a first light detector, and a light splitting device is arranged between the laser generator and the atomic gas chamber, which can split the laser emitted by the laser generator into a first part of laser and a second part of laser, and make the first part of laser enter the atomic gas chamber and make the second part of laser enter a second light detector.Once the frequency of the laser generated by the laser generator changes, the proportion of the first part of laser and the second part of laser will change, and a feedback adjustment module feeds back and adjusts the laser generator according to the detection result of the second light detector, so that the laser emitted by the laser generator is the laser with a preset frequency, thereby realizing rapid and high-precision adjustment of the laser emitted by the laser generator, and further improving the detection precision of the whole magnetic force sensor system.

The application discloses a chain-like core-shell structure crystal and a preparation method and application thereof, the crystal is chloroethyl HDABCO-sodium bromofluoroborate, a structural formula of the crystal is [CH2ClCH2N(CH2CH2)3NH]4·[(Na6Br)(BF4) 13 ], a molecular structure presents a one-dimensional chain framework with infinite extension, adjacent chains are connected through N-H...F linear hydrogen bonds and chloroethyl-HDABCO, so that the compound has polarity and has a mid-infrared second-order nonlinear effect. In addition, the ultraviolet band edge absorption of the material is close to the near ultraviolet region, so that the material is expected to be close to inorganic ultraviolet nonlinear optical materials. The crystal is obtained through room temperature volatilization crystallization, has good thermal stability, and has potential application values in the fields of laser frequency doubling conversion, electro-optic modulators, deep ultraviolet nonlinear optics and shutter used for high-speed photography.

A self-calibration atomic wavemeter, including a saturated absorption spectrum optical path based on saturated absorption spectrum to lock the probe laser frequency on cesium atomic energy level transition line; a double-peak spectrum optical path scans the coupling laser frequency after the probe laser frequency is locked by the saturated absorption spectrum, when the probe laser and the coupling laser jointly act on the alkali metal atom and resonantly excite, the electromagnetic induced transparency effect is generated; and when the probe laser is detuned, the probe laser and the coupling laser jointly act on the alkali metal atom to produce non-resonant excitation, and the double-peak EIT spectrum with Doppler frequency shift is generated, based on the linear relationship between the double-peak spectrum interval and the probe laser detuning amount, the wavelength measurement of the current probe laser can be completed, in addition, the double-peak spectrum interval and the atomic energy level transition frequency are compared, and the difference between the two is taken as an error signal feedback to the control end of the probe laser, and the frequency of the probe laser is tuned to the reference frequency benchmark, so that the calibration of the wavemeter can be realized.

The present application relates to laser frequency stabilization technology, in order to solve the contradiction between chip and long-term frequency stability of on-chip frequency stabilization technology, provide a kind of long time laser frequency stabilization system based on on-chip optical reference microcavity, including: two lasers, on-chip optical reference microcavity;Two frequency locking modules are used for locking two lasers to two different modes of on-chip optical reference microcavity respectively;Dual-mode beat frequency measurement and control module is used for real-time measurement of the dual-mode frequency difference between the two different modes locked to on-chip optical reference microcavity;In-cavity temperature slow feedback control loop is used for generating temperature fine control feedback signal based on dual-mode frequency difference, and the fine temperature of on-chip optical reference microcavity is adjusted according to temperature fine control feedback signal, to compensate the optical cavity length change caused by thermo-optic effect and thermal expansion effect, so as to stabilize the resonant frequency of on-chip optical reference microcavity, reduce the long-term drift of on-chip laser light frequency, improve the long time frequency stability of laser single frequency output.

The invention discloses a broadband FP (Fabry-Perot) cavity transmission spectral line calibration method and a calibration spectral line generation device, and belongs to the field of astronomical spectrum calibration. According to the invention, the laser frequency comb is utilized to carry out precise calibration on the FP cavity, the precision is an Hz magnitude, and the calibration precision of the radial velocity of the FP cavity can reach m / s; by tuning laser frequency comb parameters, all transmission peaks are supplemented, and broadband coverage is achieved; the high precision requirement for FP cavity coating is avoided, the accuracy of transmission spectral lines is ensured, frequent calibration is performed on the FP cavity, and the problem that the FP cavity cannot provide long-term stability of frequency is solved; a low-repetition-frequency picosecond white light source is used, the spectrum is wide and flat, the spectrum is not sensitive to the position of a transmission peak of an FP cavity, and the light enters a calibrated FP cavity array to generate a calibration spectral line with a high signal-to-noise ratio and multiple frequency intervals, so that the calibration precision of the astronomical spectrometer reaches the cm / s-level radial velocity calibration precision. The method is applied to the calibration of the astronomical spectrometer for extrasolar planet search.

The present application relates to the technical field of quantum precision measurement, in particular to a Roland C signal receiving method and system based on Rydberg atoms, which utilizes atomic antennas to prepare Rydberg atoms in an alkali metal atom gas chamber to obtain an electromagnetically induced transparency (EIT) spectrum; a Roland C signal reaches the alkali metal atom gas chamber through free space, and the EIT spectrum produces an oscillation peak by utilizing the Stark effect of the Rydberg atoms; the coupling laser frequency is locked to the maximum position of the oscillation peak amplitude; by applying a direct current bias voltage to the parallel electrodes built in the alkali metal atom gas chamber, on the one hand, the received Roland C signal is corrected, and on the other hand, the alternating current Stark effect is amplified, so that the receiving sensitivity of the Roland C signal is significantly improved.

The application discloses a kind of monitoring devices of pressure fluctuation frequency and amplitude in cavitation collapse process, including water tank, cavitation generator, magnetic fluid, magnetic field device, laser generator, optical splitter, laser probe and receiver;Optical splitter is emitted by single beam laser of laser generator and is divided into two beams, one is emitted as laser, frequency is f ;Another is as reference laser, frequency is f + f r ;Laser probe exports and irradiates on the tip of magnetic fluid by emitting laser, and reflection is formed to form reflected laser, and its frequency is f + f D ;Receiver, accept reflected laser, and it has reference laser inside by optical splitter, and its frequency is f + f r The application can master the whole dynamic data of quantized cavitation collapse by monitoring the frequency and amplitude of whole process pressure fluctuation caused by cavitation collapse in liquid environment through magnetic fluid magneto-rheological effect, tip surface effect and Doppler effect, which provides important technical means for single-cavity theory development and hydraulic machinery cavitation flow research.

The invention relates to the technical field of quantum precision measurement and automatic control, and discloses a Rydberg atom AT split signal-based closed-loop locking detection method and a Rydberg atom AT split signal-based closed-loop locking detection system. The method comprises the following steps: acquiring an EIT signal under the condition of no microwave field, and locking the frequency of coupled laser at a preset reference point to establish a frequency reference; the coupled laser and the detection laser are combined and then collinearly penetrate through the gas chamber; when the to-be-measured microwave field is applied to the gas chamber to generate AT splitting, the laser frequency shifter controls the frequency of the coupled laser to be switched between preset target frequency points; a lock-in amplifier is used for carrying out phase-sensitive detection on a detection laser light path transmission intensity signal, an error voltage signal is generated based on an AT split signal, and error voltage zero crossing points corresponding to two AT split peaks are locked through a servo controller; and calculating the to-be-measured microwave electric field intensity according to the locking point feedback control quantity difference. According to the invention, the measurement precision is improved, the anti-interference capability is enhanced, the working stability is improved, and rapid and stable detection of the microwave electric field is realized.

The invention relates to an atomic magnetic resonance measuring device, in particular to a method and equipment for stabilizing laser frequency of a CPT magnetometer. Comprising the steps that firstly, the output frequency of a laser is preliminarily adjusted to be close to the CPT resonance frequency of alkali metal atoms, and after an axial magnetic field is applied, laser is shaped into a light beam containing left-handed and right-handed circular polarization components and enters an atomic gas chamber; the double-channel detector synchronously collects light intensity signals of two types of polarization components, error signals are generated through differential normalization processing, and the feedback controller generates control signals according to the signals and adjusts the frequency of the laser so that the frequency of the laser can be locked at the zero crossing point of the error signals. Errors caused by environmental disturbance are effectively suppressed, the robustness and precision of laser frequency locking are remarkably improved, and the method is suitable for precise atom sensing systems with high stability requirements such as a CPT magnetometer and the like.

The invention relates to a reflective two-photon rubidium clock atomic fluorescence collection system. The system comprises a rubidium atom gas chamber, a reflector, an optical filter, a lens and a photoelectric detector. The rubidium atom gas chamber is a reflection cavity with a parabolic cylinder structure, the side plane of the rubidium atom gas chamber is a polling light incident plane and is plated with a color separation film for transmitting polling light and reflecting atomic fluorescence, and the polling light incident point is located at the focal point of the parabolic section; the opposite plane of the parabolic cylinder of the reflection cavity is an atomic fluorescence emergent surface, the inner wall of the parabolic cylinder is plated with an atomic fluorescence reflecting film, rubidium atom steam is contained in the parabolic cylinder, and a preset included angle is formed between the reflector and the atomic fluorescence emergent surface and used for reflecting a light path to enable a fluorescence collection light path and a polling light path to be arranged in parallel and converging emergent atomic fluorescence. The optical filter filters stray light with non-target wavelength, the lens converges atomic fluorescence after light filtering, the photoelectric detector receives the fluorescence and converts the fluorescence into an electric signal, and frequency stabilization control of the laser is achieved. By adopting the system, the space utilization rate, the system signal-to-noise ratio and the fluorescence collection efficiency can be improved.

This application provides a dual-frequency laser frequency difference adjustment system and method based on stress transfer. The system includes a dual-frequency laser and a detection component. The dual-frequency laser includes a housing, a magnetic strip, a first reflector, a second reflector, and a first deformation functional component. The first deformation functional component is connected between the first reflector and the housing and is configured to undergo at least plastic deformation when subjected to external force, and to transmit the stress generated by its deformation to the first reflector. The detection component includes a polarizer, a detector, and a processor. The detector receives the laser light emitted from the dual-frequency laser and passes through the polarizer, and converts the laser light into an electrical signal. The processor receives the electrical signal and generates frequency difference information of the two linearly polarized beams of the laser light. According to this application, damage to the dual-frequency laser can be reduced during frequency difference adjustment, and the frequency difference stability of the dual-frequency laser can be improved, as well as the ease of operation of frequency difference adjustment.

The invention relates to the technical field of laser interference measurement, and discloses a very long baseline laser interference ground time delay simulation method, which comprises the following steps of: outputting a laser beam through a laser to form an interference signal through unequal arm interference, and measuring and acquiring real-time change data of laser frequency by using a phase meter; storing the data, performing multi-path delay processing, converting the data into a voltage signal through digital-to-analog conversion, and modulating the voltage signal back to a laser beam through an acousto-optic modulator; and finally, performing beam splitting and beam combining interference on the laser beams subjected to different delay modulation to obtain an interference signal simulating very long baseline time delay, and analyzing delay information by a phase meter. The device comprises a laser, an unequal arm interference assembly, a phase meter, a digital analog converter, an acoustic optical modulator group, a beam splitting and combining assembly and a detection assembly. The method does not need to depend on an ultra-long distance physical baseline, and precise simulation of very long baseline time delay is realized through real-time measurement of frequency noise, delay modulation and interference feedback.

A device includes a grouping of N qubits, where N is equal to two or more, and a coherent light source configured to, given selected values for a set of parameters of at least a first and a second laser pulse, the parameters selected from a relative phase shift, a laser frequency, a laser intensity, and a pulse duration: apply at least the first and second laser pulses to all qubits within the grouping of N qubits, thereby coupling a non-interacting quantum state |1 to an interacting excited state |r, such that each qubit that begins in quantum state |1 returns to the state |1 upon completion of the at least first and second laser pulses, and such that qubits in the grouping are mutually blockaded.

The application provides a time delay interferometric ground semi-physical experimental verification scheme, which comprises the following steps: (1) based on a space gravitational wave detection task and a load configuration scheme, acquiring a space gravitational wave detection task core measurement, and recording measurement data; (2) constructing an algebraic relationship of a time delay interferometric scheme capable of effectively eliminating laser frequency noise and secondary noise such as optical platform jitter, and calculating a first generation time delay interference and a first generation basic combination solution according to the algebraic relationship; (3) repeating the above step (2) for multiple rounds, compensating for the difference of the equivalent interference measurement arm length, and further suppressing laser frequency noise. The application has reasonable concept, and a semi-physical simulation platform of an equivalent million kilometer arm length unequal arm Michelson interferometer is built by combining a lock arm frequency stabilization system and an electronic phase delay system, so that effective suppression of laser frequency noise is realized.

The invention discloses an arbitrary wave band frequency stabilization device based on double interferometers, and the device comprises a double-fiber interferometer module which is used for generating an interference signal related to the temperature and frequency changes; the temperature control module is used for carrying out temperature control on the dual-interferometer module; the control module is used for receiving the interference signal and outputting a control instruction according to the interference signal; wherein the double-interferometer module comprises an equal-arm interferometer and an unequal-arm interferometer; the equal-arm interferometer is used for responding to temperature change and outputting a first interference signal; the unequal-arm interferometer is used for responding to the frequency change and outputting a second interference signal; the control module receives the first interference signal and outputs a first control instruction to the temperature control module so as to improve the temperature control precision; and the control module receives the second interference signal and outputs a second control instruction to the laser so as to adjust the frequency of the laser. According to the device, the frequency of the laser can be kept stable and continuously tunable while the cost is effectively reduced.

The invention discloses an atomic optical frequency standard rapid self-locking system, which comprises a clock laser, and the output of the clock laser is divided into a first path of modulation laser and a second path of modulation laser after sequentially passing through an ultra-stable cavity system, a frequency power modulation optical system and a first spectroscope. The spectral data acquisition system acquires spectral data generated when a first path of modulation laser enters the atomic system physical system, the spectral data acquisition system is respectively connected with the servo feedback system and the integrated automatic control system, and the servo feedback system is connected with the frequency power modulation optical system; the output of the femtosecond optical comb and three paths of modulation laser divided from the second path of modulation laser are subjected to beat frequency to generate beat frequency signals which enter the photoelectric detector; and the laser, the ultra-stable cavity system, the frequency power modulation optical system, the laser frequency scanning system, the atomic system physical system and the femtosecond optical comb are respectively connected with the integrated automatic control system. The invention further discloses a rapid self-locking method for the atomic optical frequency standard, and rapid locking of the optical frequency standard is achieved.

The application discloses an optical frequency comb automatic recovery device and method, and belongs to the field of silicon-based nonlinear optical photoelectric modulation. The application comprises a laser, an IQ modulator, an acousto-optic modulator, a fiber amplifier, a polarization controller, a micro-ring resonator, a phase-locked loop, an arbitrary waveform generator, a photoelectric detector, a PID module and an upper computer. Transmission loss of an optical frequency comb debugging system is tested, which comprises fiber loss before laser enters a microcavity and transmission loss after the laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the laser frequency is slowly increased and the power is kept unchanged until a single soliton optical frequency comb is observed; when the single soliton disappears, the control steps after the laser wavelength is entered from blue detuning are repeated, and the optical frequency comb is automatically recovered.