84 results about "Rubidium atom" patented technology

The invention belongs to but is not limited to the technical field of time frequency, and discloses a method and a system for taming a rubidium atomic clock based on a long-wave timing signal, a mathematical model of the long-wave timing signal is established, the long-wave timing signal influenced by various factors is uniformly analyzed and modeled by analyzing the time-frequency characteristic of the long-wave timing signal, and the rubidium atomic clock is tamed. The long-wave time-varying signal with obvious fluctuation and periodic effects is corrected into a stable timing signal; constructing a time difference model of quadratic polynomial superposition periodic fluctuation terms for rubidium atomic clock taming, and correcting original time difference data of a rubidium clock and a long wave; and taming the rubidium atomic clock, and realizing taming of the rubidium atomic clock by using the corrected rubidium clock and the long wave time difference data in combination with a least square method. According to the invention, the problems of large short-term jitter and long-term obvious periodic effect of a long-wave timing signal are solved; the problem of fluctuation of time difference data of long waves and rubidium atomic clocks is reduced; and the application of long-wave timing in the aspect of atomic clock taming is expanded.

The invention relates to a system and method for improving the transient bandwidth of a Rydberg atomic microwave sensor, and the system comprises two lasers which are respectively used for generating detection light and coupling light; the detection light and the coupling light pass through a half-wave plate and are reflected by a polarization splitting prism to obtain first vertical polarized light, and the light transmitted through the polarization splitting prism sequentially passes through a reflector and a half-wave plate to be adjusted into second vertical polarized light; the two paths of detection light and coupling light are respectively propagated in the two rubidium atom steam pools in an opposite and coincident manner; the detection light passing through the reference rubidium atom steam pool and the polarization splitting prism and the detection light passing through the rubidium atom steam pool filled with the buffer gas and the semi-transparent and semi-reflective mirror are received by the photoelectric detector; signal microwaves and local microwaves are radiated to the two rubidium atom steam pools through the power divider and the microwave horn antenna respectively, and after a microwave electric field is applied, the intensity of beat frequency signals generated by interference of the signal microwaves and the local microwaves is measured through the change of the light intensity of detection light near EIT resonance.

The present application relates to a method, device, storage medium and terminal for optimizing the drift rate of a rubidium atomic clock. The method comprises: collecting frequency difference data of the rubidium atomic clock relative to a reference signal; establishing a time-frequency difference model of the rubidium atomic clock according to the frequency difference data and the least squares method; and adjusting the output frequency of the rubidium atomic clock according to the time-frequency difference model and the voltage-frequency fitting relationship. The present application focuses on the frequency drift compensation technology for the aging of key components inside the rubidium atomic clock. By analyzing the drift rate characteristics of the rubidium atomic clock, it is proposed to adjust the accuracy of the output frequency of the rubidium atomic clock by adjusting the voltage-controlled voltage of the constant temperature crystal oscillator inside the rubidium atomic clock, thereby improving the drift rate of the rubidium atomic clock.

The invention provides a rubidium clock RTC mixed low-power consumption time keeping device and method, and relates to the technical field of time synchronization, and the device comprises a core time management module, a processor and control module, a communication and interface module, and a power management and supply module. The core time management module comprises a real-time clock and a rubidium atomic clock; the processor and control module comprises a processor and related control logic; the real-time clock and the processor are in I2C communication connection, the real-time clock outputs an alarm clock pulse to wake up the processor according to a configured wake-up period, and the real-time clock outputs a 1pps signal to a CLK time counting pin of the processor; the rubidium atomic clock is communicated with the processor through a serial port, and the rubidium atomic clock outputs a 10MHz signal to a clock input pin of the processor to serve as a working clock of the processor. The method has the beneficial effects that the power consumption is reduced as much as possible on the premise of ensuring the time keeping precision, and the requirement of battery time keeping is met.

The embodiment of the invention provides a rubidium atomic clock based on a velocity grating spectrum and an implementation method, and the method comprises the steps: enabling a multi-frequency coherent laser source to emit a laser signal containing the velocity grating spectrum, and dividing the laser signal into two paths through a polarization splitting prism; the reflected light beam enters the laser frequency stabilization module to realize laser frequency stabilization; a transmission light beam enters the rubidium bubble through the lens group to interact with rubidium atoms; the photoelectric tube detects a transition spectral line, converts the transition spectral line from an optical signal into an electric signal and transmits the electric signal to the lock-in amplifier for demodulation; the integral amplification module converts the demodulated direct-current voltage into linear increasing voltage and transmits the linear increasing voltage to the crystal oscillator; the crystal oscillator generates an initial microwave signal and generates a microwave signal corresponding to the 87Rb atom through the frequency synthesizer; and the phase frequency modulation module modulates the microwave signal to obtain an error signal and transmits the error signal to the microwave resonant cavity so as to adjust the electromagnetic field according to the error signal to stably lock the rubidium atomic clock. The method is used for achieving the effect of improving the stability of the rubidium atomic clock system.

The invention discloses an optical communication wavelength meter for exciting rubidium atom two-photon transition based on a lithium niobate microcavity optical comb. The optical communication wavelength meter comprises a microcavity optical comb module, a repetition frequency phase-locked loop, an initial frequency phase-locked loop, a rubidium atom gas chamber and a frequency-stabilized light source. The micro-cavity optical comb module is used for generating a fundamental frequency optical comb and a frequency doubling optical comb, rubidium atom two-photon transition is directly excited, the frequency stabilization light source achieves frequency stabilization through rubidium atom saturation absorption, and the repetition frequency phase-locked loop feeds back and adjusts repetition frequency according to error signals of two-photon transition fluorescence intensity. The initial frequency phase-locked loop feeds back and adjusts the initial frequency through beat frequency signals of the frequency multiplication optical comb and the frequency stabilization light source, and the two groups of phase-locked loops stabilize the frequency of the microcavity optical comb to two groups of transition energy levels, so that locking of the repetition frequency and the initial frequency is realized. According to the optical communication wavelength meter based on the lithium niobate microcavity optical comb excitation rubidium atom two-photon transition, the cross modulation effect in a pumping wavelength and pumping power combined adjustment mechanism is avoided, and the size of the optical communication wavelength meter is reduced.

The invention belongs to the field of high-precision time calibration and navigation positioning, and discloses a rubidium atomic clock calibration method based on a Rowland system and a related device. Spectral analysis is performed based on a Welch method and an adaptive peak detection method so as to accurately identify frequency, amplitude and phase parameters of periodic components, then a mixed time difference model including a secondary trend term, a multi-period term and a noise term is constructed, and the model is solved by adopting a least square method so as to obtain key performance parameters of the rubidium atomic clock. And finally completing time calibration of the Rowland system taming rubidium clock. By adopting the method, the parameter estimation precision of the rubidium clock is effectively improved, the problems of mode aliasing, noise sensitivity, non-unique result, low calculation efficiency and the like are solved, and reliable and real-time calibration of the rubidium atomic clock by the Roland system 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 discloses a constant-temperature crystal oscillator and rubidium clock combined taming device and method, and relates to the technical field of time frequency, and the device comprises a single-chip microcomputer, an FPGA module, a TDC module, a rubidium atomic clock and a constant-temperature crystal oscillator. The FPGA module is connected with the single-chip microcomputer, the TDC module, the rubidium atomic clock and the constant-temperature crystal oscillator, the FPGA module is used for receiving a reference 1PPS signal input from the outside, the single-chip microcomputer is connected with the constant-temperature crystal oscillator through the DAC module, the TDC module is connected with the single-chip microcomputer through an SPI bus, the TDC module is used for measuring the phase difference, and the single-chip microcomputer is used for adjusting the voltage control of the constant-temperature crystal oscillator or the frequency of the rubidium atomic clock; and the FPGA module communicates with the rubidium atomic clock through a UART serial port. The output frequency has the characteristics of a constant-temperature crystal oscillator and a rubidium atomic clock at the same time, and low noise and high stability are achieved; a taming state can be quickly entered to output an accurate clock without waiting for preheating of a rubidium clock during startup; a serial taming mode is avoided, parallel taming is adopted, and when one clock source is abnormal, clock hot backup can be achieved.

The invention belongs to the technical field of atomic clocks, and particularly relates to a microwave resonant cavity of a miniature rubidium atomic clock and an implementation method of the microwave resonant cavity. The microwave cavity is manufactured by adopting a printed board process, has the characteristics of miniaturization and even chip formation, is low in production cost, can be produced in a quantized manner, has a TE011 resonance mode suitable for rubidium atoms, can ensure the performance of the atomic clock while a physical system of the rubidium atomic clock is miniaturized, overcomes the defect that a traditional rubidium atomic clock is limited by the size of the microwave cavity, and has a wide application prospect. And miniaturization is difficult. The rubidium atomic clock based on the miniature microwave cavity is expected to realize chip design, and has wide application prospects in the fields of communication, navigation, network, electric power and the like.

The invention discloses a three-light atom spectral line frequency locking system for a rubidium atom Rydberg microwave electric field meter, and the system comprises a 780nm laser, a 1260nm laser, a 776nm laser, a saturated absorption spectrum detection system, an EIT detection system, an EIA detection system, a saturated absorption spectrum frequency locking system, an EIT frequency locking system, and an EIA frequency locking system. A three-photon excitation scheme is adopted to replace a traditional two-photon excitation scheme, the size of the used laser is greatly reduced, and the output laser frequency and power are stable; compared with the existing PDH frequency locking method or laser self-operation frequency locking method, the frequency locking method combining the SAS spectrum, the EIT spectrum and the EIA spectrum has the advantages that the laser frequency locking time is greatly prolonged; the atomic spectral line three-light modulation method with the unified common modulation frequency is adopted, the frequency locking complexity of the three-light Rydberg system is fully reduced, and the method has higher popularization practicability.

This invention discloses a rubidium atomic clock frequency adaptive prediction method and system based on LSTM network, belonging to the field of time and frequency technology. The invention includes the following steps: Step 1. Data acquisition; Step 2. Filtering and denoising preprocessing; Step 3. Normalization processing; Step 4. LSTM model training and deployment; Step 5. Frequency prediction; Step 6. Online model adaptation. This invention employs a Long Short-Term Memory (LSTM) network, a special type of recurrent neural network, which can effectively learn the complex time dependencies and noise patterns in rubidium atomic clock time and frequency data. The inherent gating mechanism of the LSTM model makes it adept at capturing long-term dependencies in time series, thus enabling high-precision prediction of short-term frequency fluctuations. Through an online fine-tuning mechanism, this invention allows the LSTM model to continuously adapt to the individual drift and aging characteristics of a single rubidium atomic clock, achieving precise optimization for each clock and model, significantly improving the practicality and long-term stability of the method.

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 discloses an optical communication wavelength meter based on lithium niobate microcavity optical comb-excited rubidium atom two-photon transitions, comprising a microcavity optical comb module, a repetition frequency phase-locked loop (PLL), an initial frequency PLL, a rubidium atom gas cell, and a frequency-stabilized light source. The microcavity optical comb module generates a fundamental frequency optical comb and a frequency-doubled optical comb to directly excite rubidium atom two-photon transitions. The frequency-stabilized light source achieves frequency stabilization through rubidium atom saturation absorption. The repetition frequency PLL adjusts the repetition frequency based on the error signal of the two-photon transition fluorescence intensity. The initial frequency PLL adjusts the initial frequency by feeding back the beat signal between the frequency-doubled optical comb and the frequency-stabilized light source. The two PLLs stabilize the microcavity optical comb to two sets of transition energy levels, achieving frequency locking between the repetition frequency and the initial frequency. The optical communication wavelength meter based on lithium niobate microcavity optical comb-excited rubidium atom two-photon transitions provided in this application avoids the cross-modulation effect in the joint adjustment mechanism of pump wavelength and pump power, reducing the size of the optical communication wavelength meter.

The present invention relates to the technical field of passive rubidium atomic clock design, and specifically, to a complete design method and device for a passive rubidium atomic clock. It includes a microcontroller, a satellite time synchronization module, a test system, a frequency drift correction module, an operation reliability monitoring module, and a big data modeling of component parameters. In the present invention, the VCXO frequency-divided signal is compared with the GPS second pulse signal to detect the frequency deviation. In addition, after the frequency output signal of the rubidium atomic frequency standard is passed through an isolation amplifier, one path is used for output, and the other path is sent to a frequency drift and stability tester to be compared with a high-stability clock signal to obtain the original frequency difference, and then the microcontroller is used to realize the control of frequency deviation correction.

1. The name of the design product: rubidium atomic clock. 2. The use of the design product: used for receiving GNSS satellite signals, and through the technology of taming to make the rubidium oscillator output frequency synchronized with the GNSS satellite cesium atomic clock signal, to provide high-precision time frequency signal. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The application relates to the technical field of atomic clocks, in particular to a method for optimizing the starting characteristics of a rubidium atomic clock, which comprises the following steps: step 1: measuring the relationship between the light intensity and the output frequency accuracy of a certain determined rubidium atomic clock after starting; step 2: theoretically analyzing and testing the relationship between the C-field current and the output frequency accuracy; step 3: determining the relationship between the light intensity telemetry and the C-field current according to the data obtained from steps 1 and 2; step 4: determining the compensation coefficient according to the relationship between the light intensity telemetry and the C-field current obtained in step 3, combining the light intensity telemetry and the C-field current by designing a compensation circuit; and step 5: adjusting the parameters of the compensation circuit, so that the starting characteristics of the rubidium atomic clock are optimized. The application makes the operation of adjusting the starting characteristics of the rubidium atomic clock simple, widens the adjustment range of the starting characteristics of the rubidium atomic clock, reduces the development cost of the rubidium atomic clock, and improves the yield of the rubidium atomic clock.

The invention discloses a rubidium atomic clock intelligent detection method and a detection card, and relates to the technical field of rubidium atomic clocks, and the method comprises the following steps: monitoring the working state of a rubidium atomic clock in real time, and collecting the data of the rubidium atomic clock and the environmental parameters around the rubidium atomic clock in real time; performing real-time analysis and processing on the acquired data according to an Allan variance analysis algorithm and a linear fitting algorithm so as to evaluate the performance of the rubidium atomic clock; a data processing result is fed back to a monitoring system for adjusting the working state of the rubidium atomic clock so as to optimize the performance of the rubidium atomic clock; the rubidium atomic clock has the advantages of being miniaturized, convenient to carry, low in cost, high in real-time performance and capable of achieving multi-parameter monitoring, real-time monitoring and fault early warning of the state of the rubidium atomic clock can be achieved, and a solid foundation is laid for high-precision navigation.

The invention discloses a low-noise high-stability frequency output device and method, and relates to the technical field of time frequency, and the device comprises a constant-temperature crystal oscillator, a rubidium atomic clock, an FPGA unit, a single-chip microcomputer, a first TDC unit and a second TDC unit. The method comprises the following steps: step 1, taming a rubidium atomic clock by externally receiving a reference 1PPS signal, so that the frequency of the rubidium atomic clock is synchronized to the reference 1PPS; and 2, taming the constant-temperature crystal oscillator by generating a local 1PPS signal, so that 10MHz of the constant-temperature crystal oscillator is completely synchronized to the frequency of the rubidium atomic clock. The frequency output device is simple in structural design, and functions can be achieved through a universal FPGA and a single-chip microcomputer; the device can be tamed by using a 1PPS reference signal, so that the output frequency has the characteristics of a constant-temperature crystal oscillator and a rubidium atomic clock at the same time, and has low noise and high stability.

The invention discloses a rubidium atomic clock taming system, which comprises: a rubidium quantum unit, a rubidium servo circuit unit, a constant temperature crystal oscillator, a whole machine frequency adjustment unit, a main control MCU, a first frequency divider, a second frequency divider, a third frequency divider, a first time digital conversion unit, a second time digital conversion unit, a numerically controlled oscillator, a time difference processor, a digital phase-locked loop and a frequency multiplier, wherein the main control MCU is used for controlling and setting parameters of the rubidium quantum unit and working parameters of the rubidium servo circuit unit to complete frequency locking of the rubidium atomic clock; after the frequency locking of the rubidium atomic clock is completed, the frequency signal of the rubidium atomic clock is compared with the frequency signal of an external input, and the main control MCU controls the rubidium atomic clock to adjust the whole machine frequency, thereby completing the taming.

This invention discloses an optical non-reciprocal information encryption method and apparatus based on a time crystal. The method includes the following steps: S1, providing a three-level atomic system containing rubidium atoms, and setting a probe light and a coupling light, wherein the probe light is incident on the atomic system in a fixed direction; S2, controlling the coupling light to propagate collinearly in the opposite direction to the probe light, causing the atomic system to enter a time crystal state and generate a transmission signal with a stable oscillation frequency; S3, acquiring the oscillation frequency of the transmission signal and encoding the oscillation frequency as key information; S4, placing the atomic system in a non-time crystal state, where the transmission signal does not contain the oscillation frequency, thereby achieving non-reciprocal encryption of the key information. This invention causes the atomic system to enter or leave a time crystal state to generate or suppress a transmission signal with a stable oscillation frequency, and encodes and encrypts the oscillation frequency as key information.

The utility model discloses a six-beam phase-sensitive amplifier based on a four-wave mixing process. The six-beam phase-sensitive amplifier comprises a laser, a plurality of half-wave plates, a plurality of reflectors, a plurality of polarization beam splitters, a beam splitter, a plurality of acoustic optical modulators, piezoelectric ceramics, a Glan laser prism, a rubidium atom pool, a Glan-Thompson prism, a beam collector, a plurality of photoelectric detectors, a subtracter, a microcontroller and a spectrum analyzer. By adjusting the polarization state and path of the laser beam, the light beam is subjected to four-wave mixing in the rubidium atom pool, and quantum compression is generated. The six-beam phase-sensitive amplifier provided by the utility model can be used for realizing quantum compression enhancement and improving the fidelity of quantum information processing and the precision of quantum precision measurement.

This application provides a rubidium optically pumped magnetometer and its measurement method, belonging to the field of magnetometer technology. The entangled photon component includes a first laser and a nonlinear optical crystal, the nonlinear optical crystal being used to convert photons emitted by the first laser into entangled photon pairs; a rubidium atom gas cell for receiving the entangled photon pairs; a laser cooling system for cooling rubidium atoms to a Bose-Einstein condensate; and an interferometer phase detection system including a second laser, a first beam splitter, a beam combiner, and a signal processor. This application introduces entangled photons to form a quantum entangled state with rubidium atoms. The introduced entangled photons, through coupling with the rubidium atom system, form an enhanced quantum interference effect. Traditional rubidium optically pumped magnetometers are limited in measurement accuracy by quantum noise, but by introducing entangled photons, the system's measurement noise is reduced, thereby achieving higher measurement accuracy.

The small rubidium spectral lamp comprises a bulb and a metal base, the metal base is sleeved with a heating wire, and a glass sleeve installation through hole, a heat conduction channel with the inner diameter gradually reduced and a bulb tail fixing groove are sequentially formed in the metal base in the length direction of the metal base. One end of the glass sleeve is mounted in the glass sleeve mounting through hole, and an oscillating coil is embedded in the inner wall of the glass sleeve; the bulb comprises a bulb body, a conical area and a bulb tail, the conical area and the bulb body are integrally arranged, the bulb tail is located in the bulb tail fixing groove, the conical area is located in the heat conduction channel, the bulb body is wound by the oscillating coil, the two ends of the oscillating coil are electrically connected with the lamp excitation plate, and the lamp excitation plate is fixed to the lamp heat dissipation fixing plate. And the lamp excitation plate is connected with the metal base through a stud and a gap is reserved between the lamp excitation plate and the metal base. The working stability of the spectrum lamp in the vacuum environment can be improved, the temperature coefficient of the spectrum lamp is optimized, the light intensity of the spectrum lamp is stabilized, the size of the spectrum lamp is reduced, the structure is simple, and implementation is easy.

The invention provides a self-excitation type Mx rubidium atom magnetometer device and a working method, the self-excitation type Mx rubidium atom magnetometer device comprises an atom magnetometer probe and an atom magnetometer driving circuit, and the atom magnetometer probe is connected with the atom magnetometer driving circuit; the atom magnetometer probe comprises a VCSEL laser tube, an electro-optical modulator, a 1 / 4 slide, a rubidium atom gas chamber and a photosensitive tube. The atom magnetometer driving circuit comprises a lock-in amplifier, a phase shifter, an EOM driver and a laser tube driver. According to the invention, the atom magnetometer driving circuit synchronously modulates the polarization state and the light intensity of the pumping laser in the rubidium atom magnetometer to form an auto-excitation feedback loop, so that the problem that the radio frequency magnetic field feedback auto-excitation working mode adopted by the traditional Mx magnetometer is not suitable for the rubidium atom magnetometer is solved; and an instable feedback loop is formed.

This application provides a rubidium atomic clock based on a velocity grating spectrum and its implementation method. The method includes: a multi-frequency coherent laser source emitting a laser signal containing a velocity grating spectrum, which is split into two paths by a polarization beam splitter; the reflected beam is injected into a laser frequency stabilization module to achieve laser frequency stabilization; the transmitted beam is injected into a rubidium bulb through a lens group to interact with rubidium atoms; a phototube detects transition spectral lines, converts the transition spectral lines from optical signals to electrical signals, and transmits them to a lock-in amplifier for demodulation; an integral amplification module converts the demodulated DC voltage into a linearly increasing voltage and transmits it to a crystal oscillator; the crystal oscillator generates an initial microwave signal and generates a frequency synthesizer. 87 The microwave signal corresponding to the Rb atom; the phase-frequency modulation module modulates the microwave signal to obtain an error signal, which is then transmitted to the microwave resonant cavity to adjust the electromagnetic field according to the error signal, thereby stabilizing and locking the rubidium atomic clock. This method is used to improve the stability of the rubidium atomic clock system.

According to the rubidium isotope proportion measuring device and method based on the nuclear spin slowing factor, two beams of orthogonal laser are driven through an automatic upper computer, magnetic resonance frequencies of a high-temperature alkali metal air chamber in different bias magnetic fields are searched under different optical powers, the gyromagnetic ratio is calculated through linear fitting, and therefore the nuclear spin slowing factor of an atom ensemble is obtained, and the rubidium isotope proportion measuring method based on the nuclear spin slowing factor is obtained. And solving an overdetermined equation set by using the relationship between the slowdown factor and the isotope proportion and the rubidium atom isotope proportion, thereby realizing accurate measurement of the rubidium atom gas chamber gas isotope proportion. Compared with a conventional method, the device and the method have the advantages of accuracy, rapidness, simplicity and lower cost, and the closed air chamber structure does not need to be damaged.

The present application relates to a kind of system and method for improving the transient bandwidth of Rydberg atom microwave sensor, including two lasers, respectively for generating probe light and coupling light;Probe light and coupling light are all through half-wave plate and obtain first vertical polarized light by reflecting through polarizing beam splitter, the light transmitted through polarizing beam splitter is sequentially adjusted into second vertical polarized light by a mirror and a half-wave plate;Two-way probe light and coupling light are respectively in two rubidium atom cell opposite coincident propagation, the probe light of reference rubidium atom cell and polarizing beam splitter and the probe light after rubidium atom cell filled with buffer gas and half-transmission half-reflection mirror are all received by photoelectric detector;Signal microwave and local microwave are respectively radiated to two rubidium atom cell by power divider and microwave horn antenna, after applying microwave electric field, the intensity of beat frequency signal generated by the interference of signal microwave and local microwave is measured by the change of light intensity near EIT resonance.

The embodiment of the invention provides a lens cutting forming device of a miniature rubidium atomic clock air chamber integrated optical lens, and relates to the technical field of rubidium atomic clocks. A lens cutting forming device of a miniature rubidium atomic clock air chamber integrated optical lens comprises a bottom frame, piston cylinders are fixedly connected to the periphery of the bottom frame, a side cover is fixedly connected to one side of the bottom frame, a top frame is fixedly connected to the side, away from the bottom frame, of the side cover, and a containing frame is fixedly connected to an inner cavity of the top frame; a negative pressure assembly and a positioning assembly which are used in cooperation with the placing frame are arranged on the piston cylinder, and the negative pressure assembly comprises a double-end motor fixed between the bottom frame and the side cover; a rotating assembly and a cutting assembly which are used in cooperation with the containing frame are arranged on one side of the top frame. Through cooperation of the negative pressure assembly, the positioning assembly, the rotating assembly and the cutting assembly, a pneumatic and mechanical combined mode is adopted, and continuous and efficient cutting operation is achieved on the basis of multiple lenses under negative pressure positioning.

This invention discloses a rubidium atomic clock discipline method and related products based on the fusion of BeiDou and longwave dual-source signals, belonging to the field of high-precision time and frequency synchronization technology. The method of this invention simultaneously measures the first time difference between the rubidium atomic clock and the BeiDou reference time signal, and the second time difference with the longwave reference time signal, fusing the short-term accuracy of BeiDou with the long-term stability of longwave. An extended Kalman filter model is constructed, whose state vector includes a first type of state variable representing the time-frequency characteristics of the rubidium atomic clock and a second type of state variable representing the fused time difference between BeiDou and longwave. The first and second time difference values ​​are used as observation inputs for iterative estimation, synchronously updating the optimal values ​​of the two types of state variables. A frequency adjustment is generated based on the optimal estimate, and closed-loop control is performed on the output frequency of the rubidium atomic clock. This invention can synergistically utilize the advantages of BeiDou and longwave dual-source signals to achieve time synchronization with high instantaneous accuracy and long-term reliability.