118 results about "Rubidium atom" patented technology

The invention relates to a method for pumping a rubidium bubble for outputting standard frequency by a lamp pump rubidium gas laser and a rubidium atomic clock. The method comprises the following steps of: adopting a filtered rubidium gas electrodeless lamp as a pumping light source for pumping a rubidium gas atom in an atom steam chamber, realizing distribution quantity conversion and then forming a lamp pump rubidium gas laser under the action of a laser resonant cavity; carrying out laser pumping on the rubidium bubble arranged in a microwave cavity by utilizing the lamp pump rubidium gas laser and detecting the transition probability of the pumped rubidium atom for generating transition by generating interaction with a microwave field in the microwave cavity by utilizing the lamp pump rubidium gas laser; and locking microwave frequency fed in the microwave cavity according to the detected transition probability and locking the microwave frequency fed in the microwave cavity on clock transition frequency of the atom. In the embodiment of the invention, because the frequency of the lamp pump rubidium gas laser still operates on a rubidium transition spectral line broadening spectrum in an unlocking state, even if the frequency of the lamp pump rubidium gas laser is unlocked, the lamp pump rubidium gas laser can be rapidly locked on needed laser frequency.

The invention discloses a rubidium atomic magnetometer and a magnetic field measuring method. Based on the principle of nonlinear magneto-optic rotation, and through combination of timing control and tracking type frequency locking control, the atomic magnetometer achieves a large dynamic measurement range, high magnetic field sampling rate and high sensitivity. A DSP timing control module controls on-off of an acousto-optic modulator and a radio-frequency signal source in the physical part of the rubidium atomic magnetometer according to timing combination to adjust the magnetic field sampling rate N. The DSP timing control module further controls acquisition triggering of a data acquisition card. A calculation unit gets the Larmor precession frequency (f) through fast Fourier transform with use of a received rubidium atom Larmor precession free relaxation signal, and further calculates the value of an external magnetic field. The calculation unit selects a high magnetic field sampling rate module or a low magnetic field sampling rate module before measurement according to the pre-judged dynamic range of a to-be-measured magnetic field, and sets whether a tracking type frequency locking work mode is used when the low magnetic field sampling rate module is selected. In the working process, data is acquired and processed, and the value of the magnetic field is output.

A rubidium atom oscillator is not influenced by a circumference noise or the like, and is excellent in the short-term stability and the phase noise characteristic. A crystal oscillator oscillates a fixed frequency as an atomic resonance frequency. A direct digital synthesizer inputs an output of the crystal oscillator as a system clock and also inputs tuned data corresponding to an error signal generated according to a resonance frequency so as to carry out a variable control of an output frequency. A frequency synthesizer synthesizes and multiplies an output of the direct digital synthesizer and applies a phase modulation with a low-frequency signal. An atomic resonator inputs an output of the frequency synthesizer and detects an error signal with respect to a resonance frequency of rubidium atoms. A tuned-data generating circuit inputs the error signal from the atomic resonator so as to generate the tuned data corresponding to the error signal. The output frequency of the direct digital synthesizer is output from the rubidium atom oscillator.

The invention discloses a rubidium atom frequency standard digital phase locked frequency multiplier. The input terminal of the digital phase locked loop is connected with the output terminal of the rubidium atom frequency standard 10MHz voltage control crystal oscillatory as the output terminal of the frequency multiplier. The output terminal of the digital phase locked loop is connected with the output terminal of the microwave oven amplifier which is connected with the output terminal of the step matching circuit. The output terminal of the step matching circuit as the output terminal of the frequency multiplier is connected with the input terminal of the rubidium atom frequency standard microwave cavity. The phase detector and the digital frequency synthesizer are integrated by AD 9956. The invention adopts digital synthesizer as the fractional divider in which a digital phase locked loop is inserted, sets and modulate the fractional frequency division ratio of the digital synthesizer through the single chip computer thus enabling the direct fractional frequency multiplying and frequency modulation of the frequency multiplier. The invention with a simple structure, high degree of integration, high purity of the spectrum, low phase noise, small stray and high degree of digitalization is easy to modulate and can be used to produce miniaturized rubidium atom frequency standard.

The invention discloses a locking indication and fault diagnosis method for passive rubidium atom frequency scale, which adding a phase-adjustable square wave sampling time sequence signal on the basis of synchronization phase discrimination modulation signal and reference signal, wherein frequency of the sequence signal is fourfold of a modulation signal, and duty ratio of the sequence is 1:1. The sampling time sequence carries locking signal collection for an alternating current generated after quantum frequency discrimination, light detection amplification and square wave reshaping to estimate atom frequency scale locking condition at this point. The method uses continuous four rising edges of sampling time frequency of fourfold modulation signal as trigger pulse to carry level sampling for signal after quantum frequency discrimination, levels of the four rising edges are recorded as D1, D2, D3 and D4, atom frequency scale is estimated if it is in locking state according to recorded four sampling levels, when D1=D2 and D3=D4, the atom frequency scale is in locking state. The method can detect operation state and fault point of the passive rubidium atom frequency scale system, and can easily and conveniently exchange fault module.

In an atomic oscillator, a high-frequency converting circuit converts the output of a standard oscillator into a high frequency signal such that the frequency of the high frequency signal multiplied by a low natural number equals an atomic resonant frequency signal. The high frequency signal is then multiplied by a low natural number in an active, low-natural-number multiplier circuit to convert the output frequency of the standard oscillator into a resonant frequency to be input to the atomic oscillator. The result is that, without using a passive, high-natural-number multiplier circuit, such as a varactor diode, which is expensive, it is possible to convert the output frequency of the standard oscillator into a resonant frequency signal of a rubidium atom, thus downsizing the circuits of the atomic oscillator and reducing the term and cost of manufacture.

The invention discloses a rubidium atomic clock with a high contrast ratio frequency discrimination signal. The rubidium atomic clock comprises a controlled crystal oscillator, a frequency multiplication synthesizer, a modulation oscillator, a direct current amplifier, a quantum system and a phase detector, wherein a first Glan-Taylor polarizer is placed on a light path between a beam expander and a physical device; a second Glan-Taylor polarizer is placed between the physical device and the photoelectric detector; and the first Glan-Taylor polarizer and the Glan-Taylor polarizer are orthogonally placed. The transmission backlight intensity is filtered, the first order light frequency shift is eliminated, and the contrast ratio of the frequency discrimination and the rubidium atomic clock property are improved. The high performance atomic clock is provided for satellite navigation, communication and precision measurement.

The invention discloses a method for measuring a microwave electric field by utilizing a double-dark state system. The method is characterized in that laser provided by an external cavity semiconductor laser is split by a dichroscope into probe laser and coupling laser, and the probe laser and the coupling laser enter a rubidium atom vapor chamber in the same direction through half-wave plates and a polarization beam splitter; the two half-wave plates adjust incident light intensity of a probe laser field and a coupling laser field respectively to enable the control field >> the probe field; the probe laser is locked in a rubidium Rydberg atom 5S1 / 2 (F = 1)-5P3 / 2 transition line, and the control laser is locked in a rubidium Rydberg state atom 5S1 / 2 (F = 2)-5P3 / 2 transition line; a frequency doubling laser provides coupling laser, and adjusts the coupling laser to couple in energy level 5P3 / 2-53D5 / 2 resonance frequency; a microwave analog signal generator provides a power-adjustable microwave signal to couple transition between Rydberg atom state vectors 53D5 / 2-54P3 / 2, and thus transmission peak of EIT of Rydberg atoms splits; and a photoelectric detector detects absorption characteristics of the probe laser, and transmission peak line wide space represents electric field intensity of the microwave signal. The method can greatly narrow transmission peak line width and improve detection precision and sensitivity.

The invention discloses an improved rubidium atom frequency scale, which comprises a voltage controlled crystal oscillating module, an isolation amplifying module, a microprocessor, a digital frequency synthesis module, a radio frequency multiplication module, a physical system module, a first synchronous phase discrimination module and a temperature compensating module. The isolation amplifying module is used for isolating and amplifying output frequencies of the voltage controlled crystal oscillating module; the microprocessor is used for generating a frequency synthetic instruction, a key-controlled frequency modulation signal and a synchronous phase discrimination reference signal; the digital frequency synthesis module is used for generating a comprehensive modulation signal according to the frequency synthetic instruction and the key-controlled frequency modulation signal generated by the microprocessor; the radio frequency multiplication module is used for generating a microwave polling signal; the physical system module is used for carrying out frequency discrimination on the microwave polling signal and generating a quantum frequency discrimination signal; the first synchronous phase discrimination module is used for carrying out phase discrimination on the quantum frequency discrimination signal and generating a first voltage control signal and the temperature compensating module is used for measuring surrounding temperature of the voltage controlled crystal oscillating module and generating a second voltage control signal according to the temperature. The invention can compensate the influence on the output frequencies of the voltage controlled crystal oscillating module due to the temperature so as to improve the stability of the output frequency of the rubidium atom frequency scale.

The invention discloses a modified passive typed rubidium atom frequency scale servo controlling method and servo control circuit, which is characterized by the following: gathering and processing the quantum frequency discriminating signal through servo mode according the four double frequency modulating signal; judging the frequency of the microwave polling signal within the locking scale of atom adsorbing line breadth or at release locking condition; utilizing quantum correcting information to repair the frequency value of synthetic modulating signal; realizing the seal locking of entire machine. The invention adopts digital DDS and processor chip to integrate atom frequency marking servo part and synthetic part organically, which modifies the present miniaturized circuit structure to realize the seal locking of entire machine.

The invention discloses an all-optical switch based on a rubidium-atom optical filter and a method thereof. The all-optical switch based on the rubidium-atom optical filter comprises an alkali-metal rubidium-atom glass air chamber with a V-type energy level structure, two Glan-Taylor polarizers with the polarization directions perpendicular to each other and a stable magnetic field source used for generating a magnetic field with uniform intensity for the alkali-metal rubidium-atom glass air chamber, wherein the alkali-metal rubidium-atom glass air chamber, the two polarizers with the polarization directions perpendicular to each other and the stable magnetic field source form a standard atomic optical filter. The all-optical switch based on the rubidium-atom optical filter further comprises a 420 nm laser device serving as a control part of the all-optical switch of the atomic optical filter and a 780 nm laser device serving as a performance testing and application wavelength testing part of the all-optical switch of the rubidium-atom optical filter. The all-optical switch based on the rubidium-atom optical filter has the advantages of being clear in design principle, simple in structure, easy to manufacture, good in switching performance, stable in operation and long in service life.

The invention discloses an optical pumping rubidium atomic clock based on modulation transfer spectrum frequency stabilization laser, and a preparation method thereof. The optical pumping rubidium atomic clock comprises a narrow linewidth laser, a beam expander, a half wave plate, a polarization beam splitting prism, a phase modulator, a rubidium atomic bubble for laser frequency stabilization, ahigh-speed photoelectric detector, a mixer, a high-speed servo feedback circuit, a radio frequency signal source, a laser driving power supply, a convex lens, an acoustic optical modulator, a rubidiumatomic bubble for obtaining a clock transition spectral line, a crystal oscillator frequency synthesizer and a control circuit part; the radio frequency signal source generates a modulation signal, the modulation signal is input into the phase modulator to perform phase modulation on pumping laser, meanwhile, a demodulation signal is generated to perform mixing demodulation with the signal from the photoelectric detector to obtain an error signal, and the laser driving power supply is controlled by the high-speed servo feedback circuit to realize high-stability narrow linewidth laser based ona modulation transfer spectrum. The laser subjected to frequency stabilization is used as the pumping laser of the optical pumping rubidium atomic clock to obtain a high-performance optical pumping rubidium atomic clock.

The invention discloses a device for automatically repairing rubidium atom frequency-standard frequency drift, which comprises an A / D (analog to digital) sampling module, a frequency drift detection module, a control module, a D / A (digital to analog) conversion module, and a constant current source driving module, wherein the A / D sampling module is used for sampling voltage of a C field coil and performing analog-to-digital conversion; the frequency drift detection module is used for calculating frequency drift; the control module is used for establishing a reference table of the frequency drift and digital voltage signals of the C field coil and choosing the digital voltage signal of the C field coil from the reference table and outputting the chosen digital voltage as a voltage preset value according to the frequency drift detected in real time; the D / A conversion module is used for obtaining an analog voltage preset value by performing digital-to-analog conversion for the voltage preset value; and the constant current source driving module is used for acquiring the voltage of the C field coil, amplifying the voltage value of the C field coil at the same phase, and then comparing the amplified voltage value with the analog voltage preset value to obtain a difference value, and generating a regulated voltage according to the amplified difference value to act on the C field coil. By using the device provided by the invention, the rubidium atom frequency-standard frequency drift can be automatically repaired and the stability of system can be increased. The invention also discloses a method for automatically repairing rubidium atom frequency-standard frequency drift.

The invention discloses a cavity bubble system of the rubidium atom frequency standard. Integrated filtering absorption bubbles are fixed in a medium tube through heat conduction silicone grease and are arranged on one side of a microwave cavity, the direction of a microwave magnetic field is perpendicular to a coupling ring, one end of a heating tube is a full closed end, a heating power tube is fixed on the heating tube through a screw, a C field coil is wound around the medium tube, and two ends of the C field tube are fixed through insulation clamping rings. the integrated filtering absorption bubbles, the C field coil, the insulation clamping rings are placed in the microwave cavity, a microwave circuit plate covers one open end of the microwave cavity and is placed in the heating tube with the microwave cavity, one end of the coupling ring is connected with a phase step diode, and the other end of the coupling ring is connected with an external radio frequency signal wire. The phase step diode is welded on a microwave circuit board, a photoelectric cell is bonded to the microwave circuit board, and the heating power tube is fixed on the microwave cavity through a screw. The cavity bubble system is simple in structure, small in size, simple in cavity frequency micro-adjustment, high in performance index and easy to process.

The invention relates to a device for improving the test accuracy of spectrum absorbance on the basis of terahertz optical combs. The device is characterized in that one of two ultrafast laser pulse beams with set repeat frequency difference is transmitted through a terahertz wave generating system to generate terahertz waves, terahertz wave signals and the other ultrafast laser pulse beam are respectively focused and are jointly transmitted into a photoconductive detection antenna, the terahertz waves can be quickly scanned by the aid of tiny repeat frequency difference between pump beams and probe beams, a digital converter is controlled by the aid of a cross-correlation instrument and a rubidium atom frequency standard, the signal acquisition time is prolonged to obtain time-domain spectra of continuous terahertz pulse chains, terahertz comb-shaped spectra are obtained by means of Fourier transformation, accurate change of the optical combs is compared before and after sample placement, and accordingly terahertz absorption spectrum lines of samples can be obtained. The device has the advantages that the shortcoming of excessive scanning time consumption of mechanical delay devices can be overcome, the problem of inaccuracy of existing terahertz super-continuous spectra due to laser pulse time jitter can be solved, and the test accuracy of the terahertz spectrum absorbance can be improved.

The invention provides a high-precision synchronous time service method of a multi-point positioning system. The technical scheme includes that a 3G (the third generation) network is used for networking, a high-precision constant-temperature trained clock vibrator is used as a system time reference, a multi-system satellite receiving technology and a multichannel receiving processing technology are adopted, the shortcomings of high wired optical fiber networking engineering difficulty, inconvenience in system debugging and over high cost can be overcome, outdoor erection difficulty caused by a rubidium atom clock or a cesium atom clock is reduced, and coverage dead zones caused by interference of terrains can be avoided effectively. In addition, the problem of short-term failure of an optional system can be solved; reliability in receiving ability of systems is ensured; and synchronous clock errors caused by different elevations can be reduced.

The invention discloses an optimized passive rubidium atomic frequency scale servo control circuit. In the optimized passive rubidium atomic frequency scale servo control circuit, a non-integer voltage-controlled crystal oscillator with the resonant frequency being a non-integer MHz and the self-frequency-doubled function; double-frequency signals output by the non-integer voltage-controlled crystal oscillator undergo frequency modulation, frequency multiplication and intracavity microwave frequency multiplication, and then excite atomic ground state 0-0 transition of a physical system; the microwave exciting signals undergo frequency discrimination by utilizing the transition frequency and converted into error electrical signals through a photocell; and the correction voltage is obtainedthrough 122-Hz synchronous phase discrimination and a low-pass filter so as to control the non-integer voltage-controlled crystal oscillator to be in a locking state, thus hyperfine transition frequency stability transferring of rubidium atoms is realized, and accurate and stable output of practical rubidium atom frequency standard signals is realized through double direct digital frequency synthesizers designed by a CPLD (complex programmable logic device). The optimized passive rubidium atomic frequency scale servo control circuit has the advantages of simple structure, convenience for debugging, simplified circuit structure and the like, is beneficial to improvement of the integration degree and miniaturization of rubidium atomic frequency scale, and has an extremely good application prospect.

An atomic oscillator includes: a gas cell encapsulating a rubidium atom; a gas cell holding member holding the gas cell; a rubidium lamp exciting the rubidium atom in the gas cell; a lamp holding member holding the rubidium lamp; a temperature detecting means disposed in a recessed part provided to at least one of the gas cell holding member and the lamp holding member; and grease closely contacting an exterior surface of the temperature detecting means disposed in the recessed part and burying the temperature detecting means therein.

The invention discloses a measuring method for the quantity of a driven rubidium atom frequency standard residual magnetic field. The measuring method comprises the following steps of: applying a positive direction C field to an atom frequency standard cavity-cell system and measuring a resonance frequency F1 when an external magnetic field corresponding to the positive direction C field H1 is H1; and applying a reverse direction C field to the atom frequency standard cavity-cell system, measuring a resonance frequency F2 when the external magnetic field corresponding to the reverse directionC field -H1 is -H1 and indirectly acquiring the quantity of a corresponding residual magnetic field by comparing the difference frequency data of the resonance frequency F1 and the resonance frequency F2. By using the method, the quantity of the residual magnetic field in the atom frequency standard system can be better known, and more important, a reference for further improving the stability ofthe atom frequency standard whole frequency is convenient to provide after the influence of the change of the residual magnetic field on whole indexes and the influence quantity of the quantity and the change of the residual magnetic field on the whole indexes are known.

The invention provides an atom gas chamber inner wall coating method for slowing down atomic spin relaxation. The method includes the steps that firstly, rubidium atom steam is injected into an atom gas chamber; then, hydrogen with the pressure intensity of 10 Torr to 100 Torr is released into the atom gas chamber through hydride solid gas release agents (such as titanium hydride and calcium hydride), the pressure intensity is kept for tens to hundreds of hours at the temperature 50 DEG C to 150 DEG C, and a layer of rubidium hydride thin film can be attached to the inner wall of the atom gas chamber; and finally, hydrogen left in the gas chamber is evacuated, and the coating process is finished. Hydrogen is generated through the solid gas release agents in the coating process; compared with a traditional method that a high-pressure hydrogen bottle is used as a hydrogen source, the process safety is improved when rubidium hydride coating is conducted on the inner wall of the atom gas chamber, and hydrogen left in the gas chamber after rubidium hydride coating is evacuated; and compared with the method for directly sealing hydrogen in the gas chamber, stability of performance of the atom gas chamber is easily improved.

The invention discloses a method for improving the accuracy of the standard frequency of rubidium atoms, which comprises the following steps: (1) alternately outputting a first set frequency value and a second set frequency value as comprehensive modulation signals, and controlling a radio-frequency doubling unit to work by sequence signals; (2) doubling and mixing the output frequency of a voltage controlled crystal oscillator and the comprehensive modulation signals to acquire microwave inquiry signals; (3) acquiring the line width value of a physical system, judging whether the line width value reaches the set value or not, wherein if the line width value reaches the set value, carrying out phase discrimination on quantum frequency discrimination signals to acquire voltage control signals to be transmitted to the voltage controlled crystal oscillator, and if the line width value does not reach the set value, entering step (4); and (4) repeatedly and sequentially outputting the difference value of the first set frequency value and the line width value, the second set frequency value, the sum of the first set frequency value and the line width value and the second set frequency value as comprehensive modulation signals, controlling the radio-frequency doubling unit to work by the sequence signals, and then, returning to step (2). The invention can compress the line width of the physical system to enable coherent microwave inquiry signals to align with the actual standard frequency of the transition spectrum line of rubidium atoms.

The invention relates to a microwave power measuring device and a measuring method based on the Rydberg atom quantum coherence effect. A low electromagnetic perturbation atom air chamber equipped with helium vapor is placed in a guided wave system. Two lasers are used to excite ground state rubidium atoms to the Rydberg state. Based on the quantum effect, the measurement of the guided wave electric field is converted into the measurement of the atomic absorption spectrum. The analytical and quantitative relationship between power and the guided wave electric field is used to achieve microwave power measurement traceable to Planck constants. The measuring method provided by the invention has the advantages of high sensitivity, large dynamic range, small measurement uncertainty and the like.

The invention discloses a coherent population trapping (CPT) rubidium atom magnetometer. The CPT rubidium atom magnetometer comprises a vertical cavity surface emitting laser (VCSEL), a collimating lens, a gamma / 4 wave plate, an indium tin oxide (ITO) heater, an atomic vapor cell, a magnetic shielding barrel, a photovoltaic detector, a data collecting module, a temperature control module, an uppercomputer and a circuit control module. Under the action of a magnetic field in parallel to a light path, CPT signals generated by a modulating laser which passes through the rubidium atomic vapor cell are measured, and then according to the relation between the frequency difference and the magnetic field intensity of the CPT signals, precise measurement of the magnetic field is realized. The CPTrubidium atom magnetometer reduces the interference of external tangled magnetic fields, improves the stability of the output CPT signals, has the advantages that the sensitivity is high, the power consumption is low, the size is small and the like, and has significant application value in the aspects of biomedicine, geophysics, quantum frequency standard, military detection and the like.

The invention discloses a wide-frequency light absorption method utilizing microwave-assisted Rydberg atoms. The method comprises the specific steps of providing a beam of laser as detection light, entering a rubidium vapor pool, and coupling the detection light to rubidium atom ground state transition; in addition, providing a beam of coupled light opposite to the detection light, and reversely entering the rubidium vapor pool; adjusting the coupled light to be locked in rubidium atom Rydberg state transition for resonance coupling; forming an electromagnetic induction transparent window by the rubidium atom ground state transition and Rydberg state transition, wherein a transmission peak occurs; coupling microwave signals to the rubidium atom Rydberg state transition; splitting the transmission peak, wherein a transmission spectrum of the detection light has a bandwidth-adjustable wide-frequency absorption characteristic; and receiving a detection light signal by using a photoelectric detector, thereby obtaining an absorption spectrum line of the detection light. The method disclosed by the invention works under the conditions of room temperature and normal atmospheric pressure,and is relatively low in cost, simple and convenient to operate and suitable for large-scale production and use.

The invention belongs to the technical field of atomic light filtration and particularly relates to a 1.5-micron waveband polarization pump atomic light filter. The atomic light filter makes the magneton energy level of the atomic excitation state of alkali metal to generate atomicity difference through polarization of pumping light, the atomicity difference will bring about circular double fraction, and thus incident light has the rotation effect, and the light filtering function is achieved. Specifically, the emphasis is laid on the most common 1.5-micron waveband laser signals of a communication waveband, alkali metal rubidium atoms are selected as working atoms, Rb86 is pumped from 5S1 / 2 to 5P3 / 2 with a 780-nm semiconductor laser, and the polarization pump atomic light filter of the communication waveband is manufactured through the transition from 5P3 / 2 to 4D3 / 2 of Rb87. Because light is filtered in a polarization pumping mode, the light filtering function can be achieved by the light filter without a magnetic field, a magnetic field part structure in a traditional light filter is omitted, so that the structure of the light filter is simplified, and the 1.5-micron waveband polarization pump atomic light filter can be used in special situations with no need for a magnetic field.

A high-spatial-resolution vector magnetic field measuring device based on potassium-rubidium mixed pumping provides dual irradiation of a circular polarization pumping light beam and a linear polarization detection light beam for an atom air chamber containing potassium atoms and rubidium atoms, and is beneficial for obtaining polarizability more uniform than that of a single alkali metal atom airchamber. In addition, a detection magnetic field can be obtained through an atomic spin precession signal, atomic spin signals are obtained through a photoelastic modulator, spatial light high-frequency scanning is performed on a detection light field through a spatial light modulator digital micromirror device, magnetic field parameter modulation is performed through a three-axis magnetic compensation coil to carry out vector magnetic field detection, and high-spatial-resolution vector magnetic field measurement is achieved.

An optical atomic clock includes a fiber-coupled electro-optic modulator to phase modulate and suppress residual amplitude modulation of a frequency-doubled laser; a rubidium-enriched vapor cell configured to perform a two-photon transition of rubidium atoms to generate a fluorescence signal from the laser; and a differential lock mechanism to stabilize a frequency of the fluorescence signal to a resonance frequency of the two-photon transition of the rubidium atoms.

The invention provides a rubidium atomic clock of an atomic gas chamber with a compound-eye type stacked dense multi-bubble structure. The atomic gas chamber is an atomic gas chamber with the compound-eye type stacked dense multi-bubble structure and comprises a glass shell and a medium, the glass shell is filled with the medium and internally provided with a plurality of micro-atomic bubbles formed by glass walls and stacked in a dense and compound-eye mode, and the micro-atomic bubbles are filled with rubidium atoms and buffer gas. The whole atomic gas chamber formed by the multi-bubble structure replaces single-bubble atomic gas chambers to achieve the function of balancing the temperature drift and pressure frequency shift of an alkali metal atomic gas chamber, and therefore the constraints caused by the temperature and pressure changes of rubidium absorbing bubbles on the long-term frequency stability index of a rubidium atom frequency standard are effectively solved. The rubidiumatomic clock can solve the problem troubling technicians in the field for a long time in the world that the long-term frequency stability of bubble-type rubidium atoms is influenced by the temperature drift and pressure frequency shift of the single-bubble atomic gas chambers.

The invention discloses a pseudo-double-bubble device used for a rubidium atom frequency standard, which is small in volume and good in filtering and the resonance effect. The pseudo-double-bubble device comprises a metal chamber which is provided with a metal chamber cover and a microwave circuit board which is provided with a photocell and a coupling loop; the metal chamber is internally provided with an integrated filtering absorption bubble; the lower part of the integrated filtering absorption bubble sinks in a circular groove on the bottom of the metal chamber; the lower part of the integrated filtering absorption bubble is divided into a resonance region and a non-resonance region so as to achieve separated double-bubble functions; a filling medium is filled between the inner wall of the metal chamber and the side wall of the integrated filtering absorption bubble; a C field support is arranged on the upper part of the metal chamber; a C field coil is wound on the outer side wall of the C field support; the bottom of the metal chamber is provided with a circular groove; the bottom of the integrated filtering absorption bubble is embedded in the circular groove; the bottom of the circular groove is provided with a light through hole; and the side wall of the metal chamber is fixedly provided with a thermistor. The pseudo-double-bubble device used for rubidium atom frequency marking is simple in structure, improves the purity of the pumping light, improves the signal-to-noise ratio and conveniently regulates the resonant frequency of the microwave cavity.

The invention discloses a micro-physical system of a chip-scale atomic clock. The system comprises a magnetic shield shell, a core component and a buffer gas cavity which is enclosed by the magnetic shield shell and the core component, wherein the magnetic shield shell comprises a magnetic shield cylinder and a magnetic shield base which is used for sealing the magnetic shield cylinder; the core component is arranged in the magnetic shield shell and comprises a light source unit, a light path unit and an atom cavity unit which are arranged in sequence, wherein the atom cavity unit comprises an MEMS atom cavity, and the MEMS atom cavity is filled with rubidium atoms and buffer gas; the buffer gas cavity is filled with the buffer gas of which the pressure intensity is equal to that in the MEMS atom cavity. The micro-physical system of the chip-scale atomic clock has the advantages that the system is convenient to install, stable in performance, compact in structure, small in size, low in power dissipation and long in service life.