CN112269155A - All-fiber magnetometer device - Google Patents
All-fiber magnetometer device Download PDFInfo
- Publication number
- CN112269155A CN112269155A CN202011125792.7A CN202011125792A CN112269155A CN 112269155 A CN112269155 A CN 112269155A CN 202011125792 A CN202011125792 A CN 202011125792A CN 112269155 A CN112269155 A CN 112269155A
- Authority
- CN
- China
- Prior art keywords
- fiber
- optical fiber
- module
- optical
- alkali metal
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 45
- 239000013307 optical fiber Substances 0.000 claims abstract description 83
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000010287 polarization Effects 0.000 claims abstract description 35
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 20
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000012510 hollow fiber Substances 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000005485 electric heating Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000145637 Lepturus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- XEBWQGVWTUSTLN-UHFFFAOYSA-M phenylmercury acetate Chemical compound CC(=O)O[Hg]C1=CC=CC=C1 XEBWQGVWTUSTLN-UHFFFAOYSA-M 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- CCEKAJIANROZEO-UHFFFAOYSA-N sulfluramid Chemical group CCNS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CCEKAJIANROZEO-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/0011—Arrangements or instruments for measuring magnetic variables comprising means, e.g. flux concentrators, flux guides, for guiding or concentrating the magnetic flux, e.g. to the magnetic sensor
Abstract
The invention discloses an all-fiber magnetometer device, which comprises: the optical fiber pumping air chamber module, the pumping optical module and the detection optical module are composed of three parts, and all optical elements are optical fiber devices. The optical fiber air chamber module comprises a hollow optical fiber alkali metal air chamber, an electric heating module and a magnetic shielding module. The hollow optical fiber alkali metal gas chamber is realized by filling alkali metal atoms, inert gas and buffer gas in the hollow optical fiber; the hollow optical fiber alkali metal air chamber detects the light path. The electric heating module is used for adjusting the working temperature of the optical fiber air chamber, and the magnetic shielding module is used for shielding and compensating an environmental magnetic field. The pumping optical module consists of a pumping laser, a circular polarizer and an isolator and generates circular polarization pumping light for polarizing an atomic ensemble in an optical fiber air chamber. According to the invention, the weak magnetic field measurement can be realized, and the optical device adopts an all-fiber device, so that the device has the advantages of high precision and sensitivity, strong stability, high spatial resolution, small volume and light weight.
Description
Technical Field
The invention relates to the technical field of weak magnetic field detection, in particular to an all-fiber magnetometer device.
Background
The magnetic field measurement technology is widely applied to multiple fields of military and national defense, medicine, resource exploration, life (economic and civil life) and the like, plays an important role, and the magnetometer is rapidly developed at present, and realizes the measurement of a weak magnetic field by measuring the spin precession of atoms on the basis of the Zeeman effect. Compared with the prior widely-applied superconducting quantum interferometer, the magnetometer solves the problem of high cost caused by the need of a huge Dewar bottle to maintain low temperature. And the sensitivity is high, and the current laboratory sensitivity can reach 0.54 fT. The principle is as follows: a beam of circularly polarized laser irradiates an atomic gas chamber mixed with gaseous K atoms and He atoms, and an unpaired electron on the outermost layer of the K atoms can absorb the energy of the circularly polarized laser and enter an atomic spin polarization state. At this time, a beam of detection laser is incident into the atomic gas cell, the polarization angle of the beam of detection laser rotates, and the rotation angle depends on the angle between the electron spin and the detection laser. In recent years, scientists continuously and deeply research the atomic magnetometer, and new research methods and results are continuously provided for the atomic magnetometer. Professor teams, including the university of princeton and the university of washington, achieve a sensitivity of 0.54 fT/HZ to achieve the highest sensitivity in the world at present. In China, the research results are also deep. The Beijing university of aerospace topic group has a magnetometer with the highest sensitivity at home so far, and realizes the single-channel sensitivity of 8 fT/HZ. At present, the atomic magnetometer is mostly applied to the fields of cardio-cerebral-magnetism, aviation navigation, volcano geological measurement, underwater submarines and the like.
At present, there are several measuring methods for measuring atomic spin precession signals, and the detection method generally adopts a linearly polarized light: alkali metal atoms are pumped by circular polarization laser to enter a spin polarization state, and when a magnetic field exists outside, atoms can generate atom precession proportional to the magnetic field. Therefore, the polarization angle of the incident linearly polarized light is rotated, and the atomic spin precession signal can be measured by measuring the polarization angle. The method has high requirements on the stability of the light source and the environment, and the improvement of the precision is limited. The metal atom gas cell also has a retardation effect on left and right circularly polarized light.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an all-fiber magnetometer device which can realize weak magnetic field measurement, and an optical device adopts an all-fiber device and has the advantages of high precision and sensitivity, strong stability, high spatial resolution, small volume and light weight. To achieve the above objects and other advantages in accordance with the present invention, there is provided an all-fiber magnetometer device comprising:
the photoelectric coupler is connected with a detection optical module, an optical fiber air chamber module and a pumping optical module;
the optical fiber air chamber module comprises an optical fiber alkali metal air chamber, a heating device arranged outside an optical fiber, a magnetic shielding piece wrapping the heating device and a light reflector arranged on one side of the optical fiber alkali metal air chamber;
the pumping optical module comprises a pumping light source, a circular polarizer connected with the pumping light source through a polarization maintaining optical fiber and a circular isolator connected with the circular polarizer through the polarization maintaining optical fiber;
the detection light module comprises a detection light source, a circulator connected with the detection light source through a single-mode optical fiber, a polarizer connected with the circulator through a single-mode optical fiber, a phase modulator welded with the polarizer through a polarization maintaining optical fiber, a detector connected with the circulator through an optical fiber, and a phase-locked amplifier connected with the detector through a cable, wherein the phase-locked amplifier is connected with the phase modulator through a cable;
the detection light module further comprises an optical fiber delay line, a filter and an 1/4 wave plate, wherein the optical fiber delay line connects the phase-locked amplifier with the filter.
Preferably, the optical fiber alkali metal gas chamber is filled with alkali metal atoms, inert gas and buffer gas through a hollow optical fiber, and two ends of the hollow optical fiber are welded with the polarization maintaining optical fiber.
Preferably, the pumping light source is changed into circular polarization light through a circular polarizer, and enters the atomic fiber alkali metal gas chamber through the fiber light path, so that atoms enter a spin polarization state.
Preferably, the pumping light source is a wide-spectrum or narrow-line-width light source, the wavelength deviates from an atomic absorption spectrum line in the optical fiber air chamber, and the circular polarizer comprises a polarizer and an 1/4 wave plate, and is used for converting linearly polarized light into circularly polarized light.
Preferably, the polarizer and the phase modulator are welded through polarization maintaining optical fibers, the welding point is p, and two sections of sheet pigtails formed by the polarization axes of the two sections of fused polarization maintaining optical fibers form an angle of 45 degrees.
Preferably, the phase-locked amplifier receives the photoelectric signal output by the detector, and outputs an electric signal proportional to the precession of the atomic spins, and the phase-locked amplifier outputs a modulation signal to the phase modulator.
Preferably, the two polarized lights passing through the optical fiber delay line pass through 1/4 wave plates, become two circularly polarized lights, enter the optical fiber air chamber, generate a phase difference, return through the optical fiber mirror primary path, pass through the atomic optical fiber alkali metal air chamber again, double the phase difference, become two linearly polarized lights through 1/4 wave plates, and enter the optical fiber delay line.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device has the advantages of being large in size, strong in anti-interference capability, high in spatial resolution, light in weight and convenient to integrate due to the fact that an all-fiber optical path is adopted and all-fiber devices are used.
(2) The device adopts an optical fiber Sagnac interferometer structure. A reciprocal light path is used, so that the external interference resistance is strong, and the stability is high; the phase detection system is used for measuring the optical phase, so that the influence of external light intensity can be effectively eliminated.
(3) The device is based on K metal atom magnetic strength, has high sensitivity, high precision and low cost, and can detect weak magnetic fields.
Drawings
Fig. 1 is a schematic structural diagram of an all-fiber magnetometer device according to the present invention.
In the figure: 1, detecting an optical module; 2, photoelectric coupler; 3, an optical fiber air chamber module; pumping optical module; 10, outputting the signal; 11, detecting a light source; 12, a circulator; 13, a polarizer; 14, a phase modulator; 15, a detector; 16, a phase-locked amplifier; 17, an optical fiber delay line; 1/4 wave plates; 19, a filter; 33, optical fiber alkali metal gas chamber; 34, a fiber mirror; 35, magnetic shield; 36, an optical fiber heating device; 41, pumping light source; 42, a circular polarizer; 43, an isolator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an all-fiber magnetometer device comprising: the device comprises a photoelectric coupler 2, wherein the photoelectric coupler 2 is connected with a detection light module 1, an optical fiber air chamber module 3 and a pumping light module 4;
the optical fiber gas chamber module 3 comprises an optical fiber alkali metal gas chamber 33, a heating device 36 arranged outside the optical fiber, a magnetic shielding piece 35 wrapping the heating device 36 and a light reflector 34 arranged on one side of the optical fiber alkali metal gas chamber 33, wherein the heating device 36 is used for adjusting the working temperature of the optical fiber gas chamber, and the magnetic shielding piece 35 is used for shielding and compensating an environmental magnetic field. The fiber mirror 34 reflects the detection light back to form a reciprocal circuit.
The pumping optical module 4 comprises a pumping light source 41, a circular polarizer 42 connected with the pumping light source 41 through a polarization maintaining fiber, and a circular isolator 43 connected with the circular polarizer 42 through the polarization maintaining fiber;
the detection optical module 1 comprises a detection light source 11, a circulator 12 connected with the detection light source 11 through a single-mode optical fiber, a polarizer 13 connected with the circulator 12 through a single-mode optical fiber, a phase modulator 14 welded with the polarizer 13 through a polarization maintaining optical fiber, a detector 15 connected with the circulator 12 through an optical fiber, and a lock-in amplifier 16 connected with the detector 15 through a cable, wherein the lock-in amplifier 16 is connected with the phase modulator 14 through a cable;
the detection optical module 1 further comprises an optical fiber delay line 17, a filter 19 and an 1/4 wave plate 18, wherein the optical fiber delay line 17 connects the lock-in amplifier 16 with the filter 19.
Further, the optical fiber alkali metal gas chamber 33 is filled with alkali metal atoms, inert gas and buffer gas through the hollow optical fiber, and two ends of the hollow optical fiber are welded with the polarization maintaining optical fiber.
Further, the pumping light source 41 is changed into circular polarization light by the circular polarizer 42, and enters the atomic fiber alkali metal gas chamber 33 through the fiber light path, so that the atoms enter a spin polarization state.
Further, the pumping light source 41 is a wide-spectrum or narrow-line-width light source, the wavelength deviates from the atomic absorption spectrum line in the optical fiber air chamber, and the circular polarizer 42 includes a polarizer and an 1/4 wave plate, and is used for converting linearly polarized light into circularly polarized light.
The light source is a narrow-line laser source, the wavelength of the narrow-line laser source deviates from the atomic absorption spectrum line in the optical fiber gas chamber by 0.2nm to 0.5nm, and the K atom is a laser with the wavelength of 770nm or 767nm capable of generating resonance at the Zeeman energy level D1 or D2, wherein the detection optical module 1 adopts an optical fiber Sagnac interferometer structure, and linear polarization detection light is generated by using the narrow-line laser. When a magnetic field to be measured is input into the device, atoms in the optical fiber alkali metal gas chamber 33 generate Larmor spin precession signals, and the atomic spin precession signals are obtained by an atomic spin precession detection method based on circular polarization probe light, so that the measurement of the magnetic field is realized.
Further, the polarizer 13 and the phase modulator 14 are welded through polarization maintaining optical fibers, the welding point is p, and two sections of thin tail fibers, which are formed by two sections of polarization maintaining optical fiber polarization axes, of the welded two sections of polarization maintaining optical fibers form an angle of 45 degrees.
Further, the lock-in amplifier 16 receives the photoelectric signal output from the detector 15, and the lock-in amplifier 16 outputs an electric signal proportional to the precession of the atomic spins, while the lock-in amplifier 16 outputs a modulation signal to the phase modulator 14.
Furthermore, the two polarized lights passing through the optical fiber delay line 17 pass through the 1/4 wave plate 19, become two circularly polarized lights, enter the optical fiber air chamber 33, generate phase difference, return in the original path through the optical fiber reflector 34, pass through the atomic fiber alkali metal air chamber 33 again, double the phase difference, become two linearly polarized lights through the 1/4 wave plate 18, and enter the optical fiber delay line 16.
The working principle is as follows:
(1): the light beam emitted by the pumping light source 41 is converted into circularly polarized light 1 by the circular polarizer 42;
(2): circularly polarized light 1 enters an optical fiber air chamber 33 to polarize the spin direction of the atomic ensemble in the optical fiber air chamber;
(3): when a magnetic field to be detected is input into the device, atoms in the optical fiber air chamber 33 generate Larmor spin precession signals;
(4): the light beam generated by the detection light source 11 is converted into polarized light through the polarizer 13;
(5): the polarized light generates two beams of linearly polarized light with orthogonal polarization states through a melting point of 45 degrees, and the two beams of linearly polarized light are detection light 1 and detection light 2;
(6) the detection light 1 and the detection light 2 form left and right circularly polarized light through the 1/4 wave plate 18;
(7) the detection light 1 and the detection light 2 enter the optical fiber air chamber 33 in the magnetic field to be detected to generate a nonreciprocal phase difference phi;
(8): the phase difference phi is generated again after returning from the original path of the optical fiber reflector and passing through the optical fiber air chamber 33 of the magnetic field to be detected again, so that the total phase difference is doubled to 2 phi, a reciprocal light path is formed, and the anti-interference capability is greatly improved;
(9): the 2 beams of circularly polarized light are converted into linearly polarized light through an 1/4 wave plate 18;
(10) the detection light 1 and the detection light 2 enter the single-mode fiber through a 45-degree melting point to generate interference, and the phase difference 2 phi of the 2 detection light beams is detected through a coherent detection technology;
(11) according to the formula
Iω＝KI0J1(2asin(ωτ/2))sin(2πnlrefD2cD(ΔV)Px)
φ＝2πvl*(n+(v)-n-(v))/c＝lcre PxfD(v-v0)
Where φ is the phase difference, l is the length of the fiber chamber, c is the speed of light, reN is the number density of alkali metal atoms, f is the action intensity of atoms and light, V is the light frequency, V0 is the optical resonance transition frequency of alkali metal atoms, D (V-V0) is the dispersion function of atoms to laser, PxIs an atomic spin precession signal. Calculating P from the measured phix。
(12): according to PxThe magnetic field is calculated.
The number of devices and the scale of the processes described herein are intended to simplify the description of the invention, and applications, modifications and variations of the invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. An all-fiber magnetometer device, comprising:
the device comprises a photoelectric coupler (2), wherein the photoelectric coupler (2) is connected with a detection optical module (1), an optical fiber air chamber module (3) and a pumping optical module (4);
the optical fiber gas chamber module (3) comprises an optical fiber alkali metal gas chamber (33), a heating device (36) arranged outside an optical fiber, a magnetic shielding piece (35) wrapping the heating device (36) and a light reflector (34) arranged on one side of the optical fiber alkali metal gas chamber (33);
the pumping light module (4) comprises a pumping light source (41), a circular polarizer (42) connected with the pumping light source (41) through a polarization maintaining fiber, and a circular isolator (43) connected with the circular polarizer (42) through the polarization maintaining fiber;
the detection optical module (1) comprises a detection light source (11), a circulator (12) connected with the detection light source (11) through a single-mode optical fiber, a polarizer (13) connected with the circulator (12) through a single-mode optical fiber, a phase modulator (14) welded with the polarizer (13) through a polarization-maintaining optical fiber, a detector (15) connected with the circulator (12) through an optical fiber, and a phase-locked amplifier (16) connected with the detector (15) through a cable, wherein the phase-locked amplifier (16) is connected with the phase modulator (14) through a cable;
the detection optical module (1) further comprises an optical fiber delay line (17), a filter (19) and an 1/4 wave plate (18), wherein the optical fiber delay line (17) connects the phase-locked amplifier (16) with the filter (19).
2. An all-fiber magnetometer device according to claim 1 wherein said fiber alkali metal gas cell (33) is filled with alkali metal atoms, inert gas and buffer gas through a hollow fiber and both ends of said hollow fiber are fused to a polarization maintaining fiber.
3. An all-fiber magnetometer device according to claim 1 wherein said pump light source (41) is circularly polarized by a circular polarizer (42) and enters the atomic fiber alkali metal cell (33) through the fiber optical path to bring the atoms into a spin polarized state.
4. An all-fiber magnetometer device according to claim 1 wherein said pump light source (41) is a broad or narrow linewidth light source having a wavelength shifted from the atomic absorption line in the fiber air cell, and said circular polarizer (42) comprises a polarizer and a 1/4 plate for converting linearly polarized light into circularly polarized light.
5. An all-fiber magnetometer device according to claim 1 wherein said polarizer (13) and said phase modulator (14) are fused together by polarization maintaining fiber at a fusion point p, and the polarization axes of the two fused polarization maintaining fibers are at a 45 degree angle with respect to the two pigtails.
6. An all-fiber magnetometer device according to claim 1 wherein said lock-in amplifier (16) receives the photoelectric signal from the detector (15) and the lock-in amplifier (16) outputs an electrical signal proportional to the precession of the atomic spins, and the lock-in amplifier (16) outputs the modulated signal to the phase modulator (14).
7. An all-fiber magnetometer device as claimed in claim 1, wherein the two polarized lights passing through the fiber delay line (17) pass through 1/4 wave plate (19), become two circularly polarized lights and enter the fiber gas chamber (33), generate phase difference, return through the fiber mirror (34), pass through the atomic fiber alkali metal gas chamber (33) again, double the phase difference, become two linearly polarized lights through 1/4 wave plate (18) and enter the fiber delay line (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125792.7A CN112269155A (en) | 2020-10-20 | 2020-10-20 | All-fiber magnetometer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011125792.7A CN112269155A (en) | 2020-10-20 | 2020-10-20 | All-fiber magnetometer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112269155A true CN112269155A (en) | 2021-01-26 |
Family
ID=74341550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011125792.7A Pending CN112269155A (en) | 2020-10-20 | 2020-10-20 | All-fiber magnetometer device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112269155A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311369A (en) * | 2021-05-28 | 2021-08-27 | 清华大学 | Microminiature atomic magnetometer and magnetic imaging system based on optical fiber circulator |
| CN113447862A (en) * | 2021-06-30 | 2021-09-28 | 北京量子信息科学研究院 | Magnetic field gradient measuring device |
| CN113514046A (en) * | 2021-07-08 | 2021-10-19 | 北京航空航天大学 | Atomic spin precession signal detection device and method based on Mach-Zehnder interference |
| CN113721172A (en) * | 2021-07-27 | 2021-11-30 | 北京量子信息科学研究院 | Magnetometer and magnetometer detection method |
| WO2023040403A1 (en) * | 2021-09-14 | 2023-03-23 | 之江实验室 | Test system for atomic number density spatial distribution uniformity of alkali metal for atomic magnetometer, and method |
| US11867778B2 (en) | 2021-09-14 | 2024-01-09 | Zhejiang Lab | System and method for testing spatial distribution uniformity of alkali metal atom number density of atom magnetometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915866A (en) * | 2010-07-20 | 2010-12-15 | 上海华魏光纤传感技术有限公司 | All-fiber current transformer and working method thereof |
| CN104677508A (en) * | 2015-03-16 | 2015-06-03 | 北京航空航天大学 | Atomic spin precession detection method and device based on circular polarization detection light |
| CN205080057U (en) * | 2015-11-07 | 2016-03-09 | 包立峰 | Michelson interference type optic fibre hydrogen sensor based on PM -PCF |
| CN109631959A (en) * | 2018-11-12 | 2019-04-16 | 北京航空航天大学 | A kind of atomic spin precession detection device signal anti-interference ability optimization method based on optical fiber Sagnac interference |
-
2020
- 2020-10-20 CN CN202011125792.7A patent/CN112269155A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915866A (en) * | 2010-07-20 | 2010-12-15 | 上海华魏光纤传感技术有限公司 | All-fiber current transformer and working method thereof |
| CN104677508A (en) * | 2015-03-16 | 2015-06-03 | 北京航空航天大学 | Atomic spin precession detection method and device based on circular polarization detection light |
| CN205080057U (en) * | 2015-11-07 | 2016-03-09 | 包立峰 | Michelson interference type optic fibre hydrogen sensor based on PM -PCF |
| CN109631959A (en) * | 2018-11-12 | 2019-04-16 | 北京航空航天大学 | A kind of atomic spin precession detection device signal anti-interference ability optimization method based on optical fiber Sagnac interference |
Non-Patent Citations (2)
| Title |
|---|
| XUEJING LIU: "Research On Mechanism and Structure of All-fiber Weak Magnetic Field Atomic Sensing", 《2017 16TH INTERNATIONAL CONFERENCE ON OPTICAL COMMUNICATIONS AND NETWORKS (ICOCN)》 * |
| 宗晓刚: "全光纤弱磁传感的研究", 《中国优秀硕士论文全文数据库 工程科技辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311369A (en) * | 2021-05-28 | 2021-08-27 | 清华大学 | Microminiature atomic magnetometer and magnetic imaging system based on optical fiber circulator |
| CN113447862A (en) * | 2021-06-30 | 2021-09-28 | 北京量子信息科学研究院 | Magnetic field gradient measuring device |
| CN113514046A (en) * | 2021-07-08 | 2021-10-19 | 北京航空航天大学 | Atomic spin precession signal detection device and method based on Mach-Zehnder interference |
| CN113514046B (en) * | 2021-07-08 | 2022-11-25 | 北京航空航天大学 | Atomic spin precession signal detection device and method based on Mach-Zehnder interference |
| CN113721172A (en) * | 2021-07-27 | 2021-11-30 | 北京量子信息科学研究院 | Magnetometer and magnetometer detection method |
| WO2023040403A1 (en) * | 2021-09-14 | 2023-03-23 | 之江实验室 | Test system for atomic number density spatial distribution uniformity of alkali metal for atomic magnetometer, and method |
| US11867778B2 (en) | 2021-09-14 | 2024-01-09 | Zhejiang Lab | System and method for testing spatial distribution uniformity of alkali metal atom number density of atom magnetometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112269155A (en) | All-fiber magnetometer device | |
| JP6463423B2 (en) | Optical pumping magnetometer | |
| CN108693488B (en) | Spin-exchange-free relaxation atomic spin magnetic field measuring device based on double pumping beams | |
| US10184796B2 (en) | Chip-scale atomic gyroscope | |
| CN108287322B (en) | Atomic magnetometer without response blind zone and method for measuring external magnetic field by atomic magnetometer | |
| CN104677508A (en) | Atomic spin precession detection method and device based on circular polarization detection light | |
| CN104698410B (en) | The method of atom Magnetic Sensor and elimination magnetometer detection blind area for magnetometer | |
| Patton et al. | A remotely interrogated all-optical 87Rb magnetometer | |
| JP5223794B2 (en) | Magnetic sensor | |
| CN106996775B (en) | Self-sustaining regenerative system and Larmor precession self-sustaining regenerative method | |
| CN109631959B (en) | Atomic spin precession detection device and method based on optical fiber Sagnac interference | |
| CN104280023A (en) | Coherent layout confinement atomic clock and nuclear magnetic resonance atomic gyroscope integrated system | |
| CN103528580A (en) | Method for measuring rotating angle of aircraft based on nuclear magnetic resonance | |
| Duan et al. | Common-mode noise reduction in an atomic spin gyroscope using optical differential detection | |
| CN102288584B (en) | Continuous single-beam testing method for electronic spin useful life in semiconductor | |
| CN112946539B (en) | Single-beam reflection type triaxial magnetic field measuring device based on SERF | |
| Brandi et al. | Electron density measurements of a field-reversed configuration plasma using a novel compact ultrastable second-harmonic interferometer | |
| JP5682344B2 (en) | Magnetic measuring device and biological state measuring device | |
| JP5907234B2 (en) | Magnetic measuring device and biological state measuring device | |
| Li et al. | High sensitivity closed-loop Rb optically pumped magnetometer for measuring nuclear magnetization | |
| Wei et al. | Probe beam influence on spin polarization in spin-exchange relaxation-free co-magnetometers | |
| Zhang et al. | Atomic spin precession detection method based on the Mach-Zehnder interferometer in an atomic comagnetometer | |
| Zhang et al. | Suppression of laser power error in a miniaturized atomic co-magnetometer based on split ratio optimization | |
| Hu et al. | An electro-optic modulator detection method in all optical atomic magnetometer | |
| CN110749551B (en) | Coal mine optical fiber current sensor based on polarization analysis |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210126 |
|
| RJ01 | Rejection of invention patent application after publication |