CN111044954B - Multimodal closed-loop non-directional blind area CPT magnetic measurement method - Google Patents
Multimodal closed-loop non-directional blind area CPT magnetic measurement method Download PDFInfo
- Publication number
- CN111044954B CN111044954B CN201911313229.XA CN201911313229A CN111044954B CN 111044954 B CN111044954 B CN 111044954B CN 201911313229 A CN201911313229 A CN 201911313229A CN 111044954 B CN111044954 B CN 111044954B
- Authority
- CN
- China
- Prior art keywords
- signal
- eit
- frequency
- mode
- peak
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution ; Measuring field distribution
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
The invention relates to a multimodal closed loop non-directional blind area CPT magnetic force measuring method, belonging to the field of microwave frequency locking of a CPT magnetometer; inputting the generated single-frequency microwave signal and a modulation signal into a laser to modulate laser emitted by the laser; step two, the modulated laser is shot into a glass air chamber, and an EIT signal is demodulated by measuring the change of transmitted light power; step three, changing the center frequency of the microwave signals in sequence; step four, adopting a phase-sensitive detection method to sequentially obtain differential signals of the EIT signals under different central frequencies of the microwave signals; step five, calculating a total error signal P' (B); step six, adjusting an external magnetic field value B to be measured through a digital PID controller to enable a total error signal P' (B) to be zero; the value B is the value of the magnetic field to be measured; the invention realizes a CPT magnetometer without a direction blind area, does not need to switch a measurement mode when the direction of a magnetic field is changed, and can ensure continuous measurement of the magnetic field.
Description
Technical Field
The invention belongs to the field of microwave frequency locking of a CPT magnetometer, and relates to a multimodal closed loop non-directional blind area CPT magnetic force measuring method.
Background
The CPT magnetometer has the characteristics of small volume, low power consumption, high precision, no direction blind area and the like, and is expected to replace an optical pump magnetometer to be applied to the fields of space magnetism measurement, ocean magnetism measurement, aviation magnetism measurement and the like.
The CPT magnetometer is based on the Zeeman splitting phenomenon of an atom fine structure energy level in a magnetic field, and realizes the measurement of the magnetic field by detecting the transmission spectrum characteristic caused by the interference between two transition channels of atoms. In the inverted V-type three-level system, level |1>，|2>To the ground level, |3>Is an excited state energy level. Two beams of coherent light, having a frequency of omega, act on an atom1And ω2Corresponding to the transition frequencies between the two ground and excited states, respectively. In this case, the energy level |1>And |2>The magnetic field can be in a coherent superposition state, at the moment, the transition from a ground state to an excited state can not occur to atoms, the atoms are distributed and trapped on the ground state, so the atoms do not absorb light any more, namely the CPT phenomenon, the generated signal is called an EIT signal, and the CPT magnetometer realizes high-precision magnetic field measurement just by measuring the microwave frequency among the EIT signals.
The EIT signal changes along with the change of an included angle between an external magnetic field and laser, only +/-2-level EIT signals and +/-0-level EIT signals exist at the moment, and +/-3-level EIT signals and +/-1-level EIT signals disappear; similarly, when the laser direction is perpendicular to the magnetic field direction, only the EIT signals of + -3 level and + -1 level exist, and the EIT signals of + -2 level and 0 level disappear. If the magnetic field is measured only by locking 2 EIT signal peaks, if the directions of the laser and the magnetic field change, the locked 2 EIT signals may disappear, and at the moment, the work of the magnetometer is abnormal, namely, the magnetometer has a measuring blind area.
Disclosure of Invention
The technical problem solved by the invention is as follows: the method overcomes the defects of the prior art, provides a multimodal closed loop non-directional blind area CPT magnetic force measuring method, realizes a non-directional blind area CPT magnetometer, does not need to switch a measuring mode when the direction of a magnetic field is changed, and can ensure continuous measurement of the magnetic field.
The technical scheme of the invention is as follows:
a multimodal closed loop non-directional blind area CPT magnetic measurement method comprises the following steps:
step one, generating a frequency f0The single-frequency microwave signal of (a); generating a modulation frequency of fmFrequency modulation range of AmThe modulation signal of (a); inputting a single-frequency microwave signal and a modulation signal into a laser to modulate laser emitted by the laser;
step two, the modulated laser is shot into a glass air chamber, and an EIT signal is demodulated by measuring the change of transmitted light power;
step three, changing the center frequency of the microwave signals in sequence;
step four, adopting a phase-sensitive detection method to sequentially obtain differential signals of the EIT signals under different central frequencies of the microwave signals;
step five, adding differential signals of EIT signals under different central frequencies to obtain a total error signal P' (B); inputting the total error signal P' (B) into a digital PID controller;
step six, adjusting an external magnetic field value B to be measured through a digital PID controller to enable a total error signal P' (B) to be zero; the value B is the value of the magnetic field to be measured.
In the above method for measuring the CPT magnetic force without the directional blind area in the multimodal closed loop, in the first step, the frequency f of the single-frequency microwave signal0Is 3417.344 MHz.
In the above mentioned method for measuring the CPT magnetic force without the dead zone in the multi-peak closed loop, in the first step, the modulation frequency f is setmIs 10Hz-2 kHz; frequency modulation range AmIs 50Hz-1 kHz.
The method for measuring the CPT magnetic force without the directional blind area in the multimodal closed loop is characterized in that: in the second step, the glass gas chamber is filled with alkali metal87Rb。
In the above mentioned multimodal closed loop non-directional blind area CPT magnetic force measuring method, in the third step, the change mode of the microwave signal center frequency is S1 mode or S2 mode, wherein
Mode S1: in the microwave signalHeart frequency is changed into
f0-γB、f0+ gamma B and
mode S2: sequentially changing the central frequency of the microwave signal to f0-γB、
And f0+γB。
In the above method for measuring the multimodal closed loop non-directional blind area CPT magnetic force, B is an external magnetic field value to be measured; gamma is87Gyromagnetic ratio of Rb.
In the above mentioned method for measuring the multi-peak closed loop non-directional blind area CPT magnetic force, in the fourth step,
when the mode of S1 is adopted,
a-3 level signal peak corresponding to the EIT signal; f. of0- γ B corresponds to the-2 order signal peak of the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal;
a +3 level signal peak corresponding to the EIT signal;
when the mode S2 is adopted, f0- γ B corresponds to the-2 order signal peak of the EIT signal;
a-1 level signal peak corresponding to the EIT signal;
a +1 level signal peak corresponding to the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal.
In the above-mentioned multimodal closed loop non-directional blind area CPT magnetic measurement method, when the S1 mode is adopted, the differential signal of EIT signal-3 level signal peak is marked as P' (-3); the differential signal of EIT signal-2 level signal peak is marked as P' (-2); the differential signal of EIT signal +2 stage signal peak is noted as P' (+ 2); the differential signal of the +3 stage signal peak of the EIT signal is denoted as P' (+ 3);
when the S2 mode is adopted, the differential signal of the-2 level signal peak of the EIT signal is marked as P' (-2); the differential signal of the-1 order signal peak of the EIT signal is noted as P' (-1); the differential signal of the +1 stage signal peak of the EIT signal is denoted as P' (+ 1); the differential signal of the +2 stage signal peak of the EIT signal is denoted as P' (+ 2).
In the above method for measuring the multi-peak closed loop non-directional blind area CPT magnetometry, in the fifth step, the total error signal P' (B) is calculated by:
when the S1 mode is used, P '(B) ═ P' (-3) + P '(-2) + P' (+ 3);
when the S2 mode is used, P '(B) ═ P' (-2) + P '(-1) + P' (+ 2).
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts a 4-peak closed-loop time-sharing debugging demodulation mode, error signals of 4 EIT signals are combined into one signal, external magnetic field measurement is realized through PID controller feedback regulation, when the direction of a magnetic field changes, at least 2 EIT signal peaks always exist in the 4 EIT signals, so that the error signals always exist, compared with the traditional single-peak measurement mode, a measurement blind area does not exist, mode switching is not needed, and the problem that the traditional measurement mode generates lock losing in the mode switching process to further cause abnormal measurement can be solved;
(2) the invention adopts a time-sharing modulation mode to obtain error signals of 4 groups of EIT signals, can effectively improve the signal-to-noise ratio of the signals, and avoids the mutual interference of the 4 groups of EIT signals from influencing the measurement precision of a magnetometer;
(3) the invention carries out high-precision magnetic field measurement by measuring the microwave frequency between EIT signals, and compared with a unimodal closed loop system, the invention can eliminate the influence of the unstable problem of the microwave frequency on the measurement precision and effectively eliminate the magnetic field measurement error generated by the unstable microwave frequency.
Drawings
Fig. 1 is a flow chart of CPT measurement according to the present invention.
Detailed Description
The invention is further illustrated by the following examples.
The invention provides a multimodal closed loop non-directional blind area CPT magnetometer measurement method, which solves the problem that a directional blind area exists when 2 EIT signals are adopted for measurement, and the measurement mode needs to be switched. The invention adopts a mode of locking 4 EIT signals in a closed loop at the same time, and can ensure that at least 2 EIT signals can provide magnetic field measurement no matter how the direction of a magnetic field changes, namely, the CPT magnetometer without a direction blind zone is realized.
As shown in fig. 1, a method for measuring a multimodal closed loop non-directional blind area CPT magnetometer mainly comprises the following steps:
step one, generating a frequency f0The single-frequency microwave signal of (a); generating a modulation frequency of fmFrequency modulation range of AmThe modulation signal of (a); inputting a single-frequency microwave signal and a modulation signal into a laser to modulate laser emitted by the laser; frequency f of a single-frequency microwave signal0Is 3417.344 MHz. Modulation frequency fmIs 10Hz-2 kHz; frequency modulation range AmIs 50Hz-1 kHz.
Step two, the modulated laser is shot into a glass air chamber, and an EIT signal is demodulated by measuring the change of transmitted light power; the glass air chamber is filled with alkali metal87Rb。
Step three, changing the center frequency of the microwave signals in sequence; the center frequency of the microwave signal is changed into S1 mode or S2 mode
Mode S1: sequentially changing the central frequency of the microwave signal to
f0-γB、f0+ gamma B and
mode S2: sequentially changing the central frequency of the microwave signal to f0-γB、
And f0+γB。
B is the external magnetic field value to be measured; gamma is87Gyromagnetic ratio of Rb.
Step four, adopting a phase-sensitive detection method to sequentially obtain differential signals of the EIT signals under different central frequencies of the microwave signals; when the mode of S1 is adopted,
a-3 level signal peak corresponding to the EIT signal; f. of0- γ B corresponds to the-2 order signal peak of the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal;
a +3 level signal peak corresponding to the EIT signal; the differential signal of EIT signal-3 level signal peak is marked as P' (-3); the differential signal of EIT signal-2 level signal peak is marked as P' (-2); the differential signal of EIT signal +2 stage signal peak is noted as P' (+ 2); the differential signal of the +3 stage signal peak of the EIT signal is denoted as P' (+ 3);
when the mode S2 is adopted, f0- γ B corresponds to the-2 order signal peak of the EIT signal;
a-1 level signal peak corresponding to the EIT signal;
a +1 level signal peak corresponding to the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal. The differential signal of the-2 level signal peak of the EIT signal is noted as P' (-2); the differential signal of the-1 order signal peak of the EIT signal is noted as P' (-1); the differential signal of the +1 stage signal peak of the EIT signal is denoted as P' (+ 1); the differential signal of the +2 stage signal peak of the EIT signal is denoted as P' (+ 2).
Step five, adding differential signals of EIT signals under different central frequencies to obtain a total error signal P' (B); inputting the total error signal P' (B) into a digital PID controller;
the total error signal P' (B) is calculated by:
when the S1 mode is used, P '(B) ═ P' (-3) + P '(-2) + P' (+ 3);
when the S2 mode is used, P '(B) ═ P' (-2) + P '(-1) + P' (+ 2).
Step six, adjusting an external magnetic field value B to be measured through a digital PID controller to enable a total error signal P' (B) to be zero; the value B is the value of the magnetic field to be measured. The PID controller injects the measured magnetic field value into the EIT signal selector, the EIT signal selector can convert the magnetic field value into microwave frequency, so that the microwave frequency interval between 4 EIT signal peaks can be adjusted, an error signal output by the 4-peak synthesizer can be adjusted, when the error signal output by the 4-peak synthesizer is zero, the 4 peaks are in a locking state, and at the moment, the output of the PID controller is the magnetic field value B to be measured.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (8)
1. A multimodal closed loop non-directional blind area CPT magnetic measurement method is characterized in that: the method comprises the following steps:
step one, generating a frequency f0The single-frequency microwave signal of (a); generating a modulation frequency of fmFrequency modulation range of AmThe modulation signal of (a); inputting a single-frequency microwave signal and a modulation signal into a laser to modulate laser emitted by the laser;
step two, the modulated laser is shot into a glass air chamber, and an EIT signal is demodulated by measuring the change of transmitted light power;
step three, changing the center frequency of the single-frequency microwave signal in sequence;
step four, adopting a phase-sensitive detection method to sequentially obtain differential signals of the EIT signals under different central frequencies of the single-frequency microwave signals;
step five, adding differential signals of EIT signals under different central frequencies to obtain a total error signal P' (B); inputting the total error signal P' (B) into a digital PID controller;
step six, adjusting an external magnetic field value B to be measured through a digital PID controller to enable a total error signal P' (B) to be zero; the value B is the value of the magnetic field to be measured.
2. The method of claim 1, wherein the method comprises the following steps: in the first step, the frequency f of the single-frequency microwave signal0Is 3417.344 MHz.
3. The method of claim 2, wherein the method comprises the following steps: in the first step, the frequency f is modulatedmIs 10Hz-2 kHz; frequency modulation range AmIs 50Hz-1 kHz.
4. The method of claim 3, wherein the method comprises the following steps: in the second step, the glass gas chamber is filled with alkali metal87Rb。
5. The method of claim 4, wherein the method comprises the following steps: in the third step, the changing mode of the center frequency of the single-frequency microwave signal is S1 mode or S2 mode, wherein
Mode S1: sequentially changing the central frequency of a single-frequency microwave signal into
f0-γB、f0+ gamma B and
mode S2: sequentially changing the central frequency of a single-frequency microwave signal to f0-γB、
And f0+γB。
B is an external magnetic field value to be measured; gamma is87Gyromagnetic ratio of Rb.
6. The method of claim 5, wherein the method comprises the following steps: in the fourth step of the method, the first step of the method,
when the mode of S1 is adopted,
a-3 level signal peak corresponding to the EIT signal; f. of0- γ B corresponds to the-2 order signal peak of the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal;
a +3 level signal peak corresponding to the EIT signal;
when the mode S2 is adopted, f0- γ B corresponds to the-2 order signal peak of the EIT signal;
a-1 level signal peak corresponding to the EIT signal;
a +1 level signal peak corresponding to the EIT signal; f. of0+ γ B corresponds to the +2 signal peak of the EIT signal.
7. The method of claim 6, wherein the method comprises the following steps:
when the S1 mode is adopted, the differential signal of the EIT signal-3 level signal peak is marked as P' (-3); the differential signal of EIT signal-2 level signal peak is marked as P' (-2); the differential signal of EIT signal +2 stage signal peak is noted as P' (+ 2); the differential signal of the +3 stage signal peak of the EIT signal is denoted as P' (+ 3);
when the S2 mode is adopted, the differential signal of the-2 level signal peak of the EIT signal is marked as P' (-2); the differential signal of the-1 order signal peak of the EIT signal is noted as P' (-1); the differential signal of the +1 stage signal peak of the EIT signal is denoted as P' (+ 1); the differential signal of the +2 stage signal peak of the EIT signal is denoted as P' (+ 2).
8. The method of claim 7, wherein the method comprises the following steps: in the fifth step, the method for calculating the total error signal P' (B) includes:
when the S1 mode is used, P '(B) ═ P' (-3) + P '(-2) + P' (+ 3);
when the S2 mode is used, P '(B) ═ P' (-2) + P '(-1) + P' (+ 2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313229.XA CN111044954B (en) | 2019-12-19 | 2019-12-19 | Multimodal closed-loop non-directional blind area CPT magnetic measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911313229.XA CN111044954B (en) | 2019-12-19 | 2019-12-19 | Multimodal closed-loop non-directional blind area CPT magnetic measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111044954A CN111044954A (en) | 2020-04-21 |
| CN111044954B true CN111044954B (en) | 2022-04-12 |
Family
ID=70237712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911313229.XA Active CN111044954B (en) | 2019-12-19 | 2019-12-19 | Multimodal closed-loop non-directional blind area CPT magnetic measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111044954B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645627A (en) * | 2013-11-29 | 2014-03-19 | 中国科学院武汉物理与数学研究所 | Device and method for achieving Ramsey-CPT atomic clock through microwave frequency switching |
| CN104868913A (en) * | 2015-04-30 | 2015-08-26 | 江汉大学 | Coherent population trapping atomic frequency standard |
| JP2016152515A (en) * | 2015-02-17 | 2016-08-22 | 株式会社リコー | Atomic oscillator, method for controlling the same, and program for controlling the same |
| CN106099638A (en) * | 2016-08-02 | 2016-11-09 | 北京航空航天大学 | A kind of Distributed Feedback Laser frequency-stabilizing method controlled based on electric current |
| CN106200354A (en) * | 2016-08-04 | 2016-12-07 | 北京航天控制仪器研究所 | A kind of optical-fiber type CPT atomic clock physical system |
| CN109856570A (en) * | 2019-02-28 | 2019-06-07 | 中国计量大学 | A kind of Coherent Population Trapping imprison CPT rubidium atom magnetometer |
| CN110333651A (en) * | 2019-07-15 | 2019-10-15 | 温州激光与光电子协同创新中心 | Laser atom clock based on the locking of Coherent Population Trapping number Duress Mode |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7345553B2 (en) * | 2004-03-18 | 2008-03-18 | Agilent Technologies, Inc. | Method and apparatus for reducing errors due to line asymmetry in devices utilizing coherent population trapping |
| US10171095B2 (en) * | 2013-09-27 | 2019-01-01 | Seiko Epson Corporation | Atomic oscillator, electronic apparatus, moving object, and manufacturing method of atomic oscillator |
-
2019
- 2019-12-19 CN CN201911313229.XA patent/CN111044954B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645627A (en) * | 2013-11-29 | 2014-03-19 | 中国科学院武汉物理与数学研究所 | Device and method for achieving Ramsey-CPT atomic clock through microwave frequency switching |
| JP2016152515A (en) * | 2015-02-17 | 2016-08-22 | 株式会社リコー | Atomic oscillator, method for controlling the same, and program for controlling the same |
| CN104868913A (en) * | 2015-04-30 | 2015-08-26 | 江汉大学 | Coherent population trapping atomic frequency standard |
| CN106099638A (en) * | 2016-08-02 | 2016-11-09 | 北京航空航天大学 | A kind of Distributed Feedback Laser frequency-stabilizing method controlled based on electric current |
| CN106200354A (en) * | 2016-08-04 | 2016-12-07 | 北京航天控制仪器研究所 | A kind of optical-fiber type CPT atomic clock physical system |
| CN109856570A (en) * | 2019-02-28 | 2019-06-07 | 中国计量大学 | A kind of Coherent Population Trapping imprison CPT rubidium atom magnetometer |
| CN110333651A (en) * | 2019-07-15 | 2019-10-15 | 温州激光与光电子协同创新中心 | Laser atom clock based on the locking of Coherent Population Trapping number Duress Mode |
Non-Patent Citations (4)
| Title |
|---|
| CPT磁力仪暗态耦合磁场测量技术;张笑楠等;《中国惯性技术学报》;20171215(第06期);全文 * |
| Long distance propagation of resonant pulses under conditions of induced transparency;V.G. Arkhipkin等;《Conference Digest. 2000 International Quantum Electronics Conference (Cat. No.00TH8504)》;20020806;全文 * |
| 数字伺服实现相干布居囚禁原子频标的激光稳频;吕利强等;《中国激光》;20090610(第06期);全文 * |
| 相干布居囚禁原子钟技术及其进展;郭文阁等;《时间频率学报》;20070630;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111044954A (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9568319B2 (en) | Angular velocity detection method adopting bi-directional full reciprocal coupling optoelectronic oscillator | |
| Morse et al. | rf Wien filter in an electric dipole moment storage ring: The “partially frozen spin” effect | |
| CN104297702B (en) | Measurement method and device of Bell-Bloom self-modulation three-axis magnetic field | |
| CN109799468A (en) | A kind of high-precision Coherent Population Trapping imprison CPT rubidium atom magnetometer | |
| CN103257463B (en) | Method for locking LiNbO3 Mach-RPAMZM offset working point | |
| CN110784217A (en) | Cesium microwave atomic clock based on microwave-optical frequency modulation transfer technology and implementation method | |
| CN102129050B (en) | Plasma magnetic field measuring method and device based on grid modulation phase comparison | |
| CN111044954B (en) | Multimodal closed-loop non-directional blind area CPT magnetic measurement method | |
| CN113839297B (en) | Photoelectric oscillator based on injection locking effect | |
| CN111060855B (en) | High-sensitivity magnetic field measurement method based on width and width of electronic gyromagnetic resonance line | |
| CN111044946B (en) | Multimodal closed-loop non-directional blind area CPT magnetometer system | |
| CN112857591A (en) | Single laser source optical fiber laser system for cold atom interferometer | |
| Kim et al. | Fiber-optic gyroscopes: In harsh, confining environments this advanced gyroscope, a close cousin to the ring laser gyro, offers great advantages | |
| CN116230287A (en) | Laser system and method for rubidium atom double-color magneto-optical trap | |
| CN103308147A (en) | Vibration measurement method and system based on single-frequency laser feedback | |
| CN113471807B (en) | Raman optical pulse power stabilizing system for cold atom interferometer | |
| CN112540327A (en) | Light path for inhibiting steering difference of laser optical pump magnetometer and design method | |
| CN110426655B (en) | Optical pump magnetometer closed-loop control method based on phase-locked loop segmented PID | |
| CN114336240A (en) | Modularized cold atom interference laser system based on single-frequency fiber laser | |
| Liu et al. | Optical pumped cesium atomic clock with multi-pole magnet | |
| CN114166112A (en) | Light source system of atomic interferometer and light source design method | |
| CN116774114A (en) | Magnetic field vector measurement method based on CPT effect | |
| CN117031367A (en) | Double-shaft atomic magnetometer closed-loop control system and method based on pulse resonance | |
| Pati et al. | Single-shot vector magnetic measurements using synchronous coherent population trapping resonance in a feedback compensation system | |
| CN114421273B (en) | Laser frequency shift method and device based on precise spectrum of alkali metal atoms |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |