CN110261797A - A kind of optical pumping atom magnetometer based on multi-way annular optical cavity - Google Patents
A kind of optical pumping atom magnetometer based on multi-way annular optical cavity Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 83
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000010287 polarization Effects 0.000 claims description 32
- 238000005259 measurement Methods 0.000 claims description 4
- 230000011514 reflex Effects 0.000 claims description 4
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
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- 241000208340 Araliaceae Species 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- 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
Abstract
The present invention provides a kind of optical pumping atom magnetometer based on multi-way annular optical cavity, including multi-way annular optical cavity module, detection light path module, magnetic field control module, signal analysis and Control module and pumping light path module；The multi-way annular optical cavity module repeatedly passes through atomic air chamber for realizing exploring laser light back and forth, the detection light path module is for realizing to the detection process of atomic spin precession state in magnetic field and converting optical signal into voltage signal, the magnetic field control module is used to shield external environment magnetic field to atom and generates function magnetic field, the signal analysis and Control module is used to read and analyze the voltage signal of atomic spin precession state and feedback output magnetic field control signal, the pumping light path module are used to provide pump light for atomic air chamber.The present invention extends atomic medium to the operating distance of exploring laser light by multiple reflections exploring laser light, enhances signal output signal strength, and then improves the detection of magnetic field sensitivity of optical pumping atom magnetometer.
Description
Technical field
The present invention relates to magnetic field measurement technology fields, particularly, are related to a kind of optical pumping atom based on multi-way annular optical cavity
Magnetometer.
Background technique
Precision magnetometer has non-in medical diagnosis, space science, mineral exploration and the military technical fields such as antisubmarine
Often it is widely applied.Atom magnetometer is represented as the mainstream of current precision magnetometer, and basic functional principle is using sharp
Light reads the motion state of atomic spin, and the magnetic field size of the motion state and atom local environment is closely related；Specifically
Ground, due to non-zero atomic spin have magnetic moment, will receive under magnetic fields torque effect to fixed frequency around
The precession of magnetic field line direction, and the precession frequency is directly proportional to the size of magnetic field strength, therefore can pass through observation atomic spin
Precession frequency obtains the magnetic field data of atom local environment.Therefore atom magnetometer is also referred to as optics magnetometer, according to specific
The difference of measuring principle, atom magnetometer can be divided into proton magnetometer, CPT atom magnetometer, diamond colour center nonmagnetic atom
The classifications such as power instrument and optical pumping atom magnetometer.
For optical pumping atom magnetometer, measuring principle is as follows: the linearly polarized laser of outgoing passes through polarized atomic spin
Afterwards, Faraday rotation can occur for the linear polarization of laser, and the angle turned over is referred to as Faraday rotation angle, since faraday is revolved
The size of corner is proportional to the magnitude of field intensity that atomic spin generates and laser passes through the optical path length size of medium, therefore
The Faraday rotation angle that optical pumping atom magnetometer can be generated according to linearly polarized laser reads the precession frequency of atomic spin, thus
To the intensity data in magnetic field to be measured.
Existing optical pumping atom magnetometer due to being limited by equipment volume, atomic medium in atomic air chamber for
The operating distance (i.e. optical path length) of exploring laser light is also limited, therefore the Faraday rotation that exploring laser light is generated in linear polarization
Angle is small, and the signal strength of optical pumping atom magnetometer output is weak, greatly limits the sensitivity of detection of magnetic field.
Summary of the invention
The purpose of the present invention is to provide a kind of increase laser by the optical path length of atomic medium and to improve detection of magnetic field
The optical pumping atom magnetometer of sensitivity, to solve the problems, such as to propose in background technique.
To achieve the above object, the present invention provides a kind of optical pumping atom magnetometers based on multi-way annular optical cavity, including
Multi-way annular optical cavity module, detection light path module, magnetic field control module and signal analysis and Control module；
The multi-way annular optical cavity module includes atomic air chamber, incident hysteroscope, outgoing hysteroscope and the first reflecting mirror, it is described enter
It penetrates hysteroscope and outgoing hysteroscope is separately positioned in the exploring laser light input path and exploring laser light emitting light path of atomic air chamber, it is described
Roundtrip of first reflecting mirror for realizing exploring laser light between incident hysteroscope and outgoing hysteroscope, by incident hysteroscope, goes out
The cooperation for penetrating orientation between hysteroscope and the first reflecting mirror realizes that exploring laser light repeatedly passes through atomic air chamber back and forth；
The detection light path module includes detecting laser, the second polarization spectroscope, the first photodetector and the second light
Electric explorer, the detecting laser are used for incident hysteroscope emission detection laser, and second polarization spectroscope is for will be from
The exploring laser light that outgoing hysteroscope projects is divided into two bundles the equal laser A of optical power and laser B, first photodetector and the
Two photodetectors are separately positioned in the optical path of laser A and laser B and for converting optical signal into voltage signal；
The magnetic field control module includes producing around the field coil of atomic air chamber setting and for controlling field coil
The field drives source of magnetisation field intensity realizes the shielding external environment magnetic field to atom by the field coil and applies function
It can magnetic field；
The signal analysis and Control module connects respectively with the first photodetector, the second photodetector, field drives source
It connects, calculate magnetic field strength date that atomic spin is experienced by analyzing the signal from two photoelectric controllers and issues magnetic
Field control signal.
Preferably, the signal analysis and Control module includes difference channel and data processing server, the difference channel
It is connect with the signal output end of the first photodetector, the second photodetector, and for from two photodetectors
Output signal does calculus of differences, and the data processing server is separately connected with difference channel, field drives source, and for receiving
Operation result from difference channel carries out magnetic field signal resolving and issues corresponding magnetic field control signal.
It preferably, further include for providing the pumping light path module of pump light, the pumping light path module for atomic air chamber
Including for emitting pumping laser pump laser and for by linearly polarized laser be converted into circularly polarized laser four/
One wave plate.
Preferably, in the atomic air chamber, the optical path of pumping laser and the optical path of exploring laser light are vertically arranged.
Preferably, the pumping light path module further includes that expanding between quarter-wave plate and atomic air chamber is arranged in
Mirror, pumping laser irradiate entire atomic air chamber after being expanded by the beam expanding lens.
Preferably, the pumping light path module further includes third polarization spectroscope and pumping laser controller, the third
Polarization spectroscope is used to the pumping laser projected from pump laser being divided into main beam and reference beam, wherein main beam conduct
The pump light of atomic air chamber is injected, reference beam feeds back to choosing of the pumping laser controller realization to pump laser frequency and power
It selects and stablizes；
The detection light path module further includes the first polarization spectroscope and exploring laser light controller, first polarization spectro
Mirror is used to the exploring laser light projected from detecting laser being divided into main beam and reference beam, and wherein main beam injects atomic air chamber
The precession state of middle Measurement atom spin, reference beam feed back to exploring laser light controller and realize to exploring laser light frequency and power
Selection and stabilization.
Preferably, the pumping laser emitting light path of the atomic air chamber is overlapped with the position of the first reflecting mirror, the pumping
Light path module further includes optoisolator, and the optoisolator is arranged on the pumping laser emitting light path of atomic air chamber and is located at original
Between sub- gas chamber and the first reflecting mirror, for avoiding pump light from turn resulting in atomic spin pole because reflex returns to atomic air chamber
Change loss.
Preferably, the pumping light path module further includes second reflecting mirror compact for realizing optical path.
Preferably, the quantity of first reflecting mirror is multiple；The incidence hysteroscope, outgoing hysteroscope and first reflecting mirror
Reflection angle can be adjusted individually.
Preferably, between the difference channel and data processing server, the data processing server and field drives
It is connected between source by data line.
Technical solution provided by the invention at least has the following beneficial effects:
1, the present invention constitutes multi-way annular optical cavity using atomic air chamber, incident hysteroscope, outgoing hysteroscope and the first reflecting mirror, visits
Laser roundtrip between incident hysteroscope, outgoing hysteroscope and the first reflecting mirror is surveyed to extend simultaneously repeatedly back and forth by atomic air chamber
Atomic medium increases the Faraday rotation of exploring laser light linear polarization to the operating distance of exploring laser light in atomic air chamber
Angle, and then the intensity of optical pumping atom magnetometer output signal is enhanced, substantially increase the detection of magnetic field of optical pumping atom magnetometer
Sensitivity.
2, the present invention is by the adjustable incident hysteroscope in setting orientation, outgoing hysteroscope and the first reflecting mirror, it can be achieved that detection
The adjustment of laser travelling route in multi-way annular optical cavity, so that the multi-way annular optical cavity structure that the present invention constructs is suitable for various
Atomic air chamber of different shapes realizes the high-acruracy survey to magnetic field.
3, the present invention makes a large amount of atoms in atomic air chamber be in identical state by applying optical pumping means, former at this time
Son spin is equally directed to, and the raising signal strength of optical pumping atom magnetometer can be effectively improved；The present invention passes through setting light
Isolator so that the pumping laser projected will not be radiated on the first reflecting mirror of multi-way annular optical cavity module, and then avoids producing
Caused by life causes pump light to return to atomic air chamber because of reflex the case where atomic spin polarization loss.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings discussed below is only some embodiments of the present invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing, in which:
Fig. 1 is the module connection diagram of optical pumping atom magnetometer in the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of optical pumping atom magnetometer in the embodiment of the present invention 1；
In figure: 11 atomic air chambers, 12 incident hysteroscopes, 13 outgoing hysteroscopes, 14 first reflecting mirrors；21 detecting lasers, 22
One polarization spectroscope, 23 exploring laser light controllers, 24 second polarization spectroscopes, 25 first photodetectors, 26 second photoelectricity are visited
Survey device；31 field coils, 32 field drives sources；41 difference channels, 42 data processing servers；51 pump lasers, 52 thirds
Polarization spectroscope, 53 pumping laser controllers, 54 second reflecting mirrors, 55 quarter-wave plates, 56 beam expanding lens, 57 optoisolators.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiments are merely a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
Referring to Fig. 1~2 (arrow is laser by direction or signal transmission direction in figure), one kind being based on multi-way annular optical cavity
Optical pumping atom magnetometer, including multi-way annular optical cavity module, detection light path module, magnetic field control module, signal analysis and Control
Module and pumping light path module.
The multi-way annular optical cavity module includes atomic air chamber 11, incident hysteroscope 12, outgoing hysteroscope 13 and the first reflecting mirror
14.The atomic air chamber 11 is closed light transmission gas chamber, and enclosed inside has alkali metal atom steam and nitrogen, the incidence chamber
Mirror 12 and outgoing hysteroscope 13 are separately positioned in the exploring laser light input path and exploring laser light emitting light path of atomic air chamber 11, institute
State the roundtrip for realizing exploring laser light between incident hysteroscope 12 and outgoing hysteroscope 13.
Specifically, the incident hysteroscope 12 and outgoing hysteroscope 13 are in its near axis region (i.e. circle of radius 1mm
In range) in be coated with anti-reflection film, remaining region is then coated with high-reflecting film.Exploring laser light passes through the anti-reflection diaphragm area of incident hysteroscope 12
Into multi-way annular optical cavity, exploring laser light is turned back in optical cavity when running, and the reflection drop point of laser is constantly in incident hysteroscope 12
In the high-reflecting film region of outgoing hysteroscope 13, until exploring laser light is radiated at the anti-reflection diaphragm area of outgoing hysteroscope 13 and leaves multi-way
Annular optical cavity.
In the present embodiment, the quantity of first reflecting mirror 14 is one and is located at incident hysteroscope 12 and outgoing hysteroscope 13
Between line central axes on, first reflecting mirror 14 cooperatively forms equilateral in position with incident hysteroscope 12, outgoing hysteroscope 13
Triangular structure, by the cooperation of reflection angle between incident hysteroscope 12, outgoing hysteroscope 13 and the first reflecting mirror 14, so that detection swashs
Light roundtrip between three, and then realize that exploring laser light repeatedly passes through atomic air chamber 11 back and forth.
In the present embodiment, the incident hysteroscope 12, outgoing hysteroscope 13 and the first reflecting mirror 14 are for the anti-of exploring laser light
The adjustment, it can be achieved that exploring laser light travelling route in multi-way annular optical cavity can individually be adjusted by penetrating direction.
The detection light path module include detecting laser 21, the first polarization spectroscope 22, detecting laser controller 23,
Second polarization spectroscope 24, the first photodetector 25 and the second photodetector 26.The detecting laser 21 is used for entering
12 emission detection laser of hysteroscope is penetrated, the exploring laser light point that first polarization spectroscope 22 is used to project from detecting laser 11
For main beam and reference beam, wherein reference beam feeds back to exploring laser light controller 23 and for realizing to exploring laser light frequency
With the selection and stabilization of power, and main beam then inject in atomic air chamber 11 for Measurement atom spin precession state, key light
Beam projects after multiple reflections from outgoing hysteroscope 13 in multi-way annular optical cavity, and is divided into two bundles light function by the second polarization spectroscope 24
The equal laser A of rate and laser B, first photodetector 25 and the second photodetector 26 be separately positioned on laser A and
In the optical path of laser B and for converting voltage signal for the optical signal that atomic spin detects.
The magnetic field control module includes around the field coil 31 of the setting of atomic air chamber 11 and for controlling magnetic field line
Circle 31 generates the field drives source 32 of magnetic field strength.The external environment magnetic field shielding to atom is realized by the field coil 31
Apply with function magnetic field, the application process in the function magnetic field is alternating excitation magnetic needed for generating optical pumping atom magnetometer
, the alternative frequency in magnetic field is equal to Spin precession frequency of the atomic spin in the case where detecting magnetic fields.
The signal analysis and Control module includes difference channel 41 and data processing server 42.The difference channel 41 with
The signal output end connection of first photodetector 25, the second photodetector 26, and for from two photodetectors
Output signal do calculus of differences, the data processing server 42 is separately connected with difference channel 41, field drives source 32, and
For receiving the operation result progress magnetic field signal resolving from difference channel 41 and issuing corresponding magnetic to field drives source 32
Field control signal.
In the present embodiment, between the difference channel 41 and data processing server 42, the data processing server
It is connected between 42 and field drives source 32 by data line.The data processing server 42 is computer.
The pumping light path module includes pump laser 51, third polarization spectroscope 52, pumping laser controller 53,
Two-mirror 54, quarter-wave plate 55 and beam expanding lens 56.The pump laser 51 is for emitting pumping laser, the third
Polarization spectroscope 52 is used to the pumping laser projected from pump laser 51 being divided into main beam and reference beam, wherein reference light
Beam feeds back to pumping laser controller 53 and for realizing the selection and stabilization to pump laser frequency and power, and main beam is then
It is successively injected after second reflecting mirror 54, quarter-wave plate 55 and beam expanding lens 56 in atomic air chamber 11 as pumping
Light, the quarter-wave plate 55 are used to convert linearly polarized laser to circularly polarized laser, and the beam expanding lens 56 will be for that will pump
Entire atomic air chamber is irradiated after laser beam expanding.
In the present embodiment, in the atomic air chamber 11, the optical path of the pumping laser and optical path of exploring laser light is vertical sets
It sets, and the atomic air chamber 11 also is located at and is located between incident hysteroscope 12 and outgoing hysteroscope 13 on the central axes of line, therefore, atom
The pumping laser emitting light path of gas chamber is just overlapped with the position of the first reflecting mirror 14.
In order to avoid pump light in turn results in atomic spin polarization loss because reflex returns to atomic air chamber, in this implementation
In example, the pumping light path module further includes optoisolator 57, and the pumping that atomic air chamber 11 is arranged in the optoisolator 57 swashs
On light emitting light path and between atomic air chamber 11 and the first reflecting mirror 14.
Optical pumping atom magnetometer based on multi-way annular optical cavity in the present embodiment, the course of work are as follows:
1) optical pumping atom magnetometer is assembled by sequence and equipment room connection relationship according to laser；
2) pumping laser that the pump laser 51 projects is divided into main beam and ginseng after third polarization spectroscope 53
Light beam is examined, wherein reference beam feeds back to pumping laser controller 53, and the pumping laser controller 53 is to pump laser 51
Adjustment signal is issued, main beam is converted into circular polarization by linearly polarized laser after the second reflecting mirror 54 and quarter-wave plate 55
Laser is injected in atomic air chamber 11 after expanding using beam expanding lens 56, and the pump light projected from atomic air chamber 11 is by optoisolator
57 stop；
3) exploring laser light that the detecting laser 21 projects is divided into main beam and ginseng after the first polarization spectroscope 22
Light beam is examined, wherein reference beam feeds back to exploring laser light controller 23, and the exploring laser light controller 23 is to detecting laser 21
Adjustment signal is issued, main beam passes through incident hysteroscope 12 and injects in multi-way annular optical cavity；
4) reflection direction for adjusting incident hysteroscope 12, outgoing hysteroscope 13 and the first reflecting mirror 14, makes the master of exploring laser light
Light beam roundtrip between incident hysteroscope 12, outgoing hysteroscope 13 and the first reflecting mirror 14, exploring laser light is multiple in the process
Detection by atomic air chamber 11 and realization to atom Spin precession state in atomic air chamber, exploring laser light is eventually by outgoing chamber
Mirror 13 projects；
5) exploring laser light projected is divided into two bundles the equal laser A and laser B of optical power after polarization spectroscope 24, and
It is received respectively by the first photodetector 25 and the second photodetector 26, voltage is converted optical signal by photodetector
Signal；
6) difference channel 41 does calculus of differences, operation result to the output voltage signal from two photodetectors
Input data processing server 42 obtains the precession frequency of atomic spin by the change frequency of voltage signal, carries out magnetic field letter
Number resolving realize optical pumping atom magnetometer of the present invention to magnetic field to obtain the magnitude of field intensity that atomic spin is experienced
High sensitivity detection；
7) in addition, data processing server 42 also exports magnetic field control signal to field drives source 32, optical pumping atom is generated
Alternating excitation magnetic field needed for magnetometer, field frequency are equal to Spin precession frequency of the atomic spin in the case where detecting magnetic fields.
The present invention utilizes multi-way annular optical cavity structure, and the exploring laser light in optical pumping atom magnetometer is made repeatedly to pass through original back and forth
Sub- gas chamber extends working media to the operating distance of exploring laser light, increases faraday's rotation of exploring laser light linear polarization
Corner enhances the signal output intensity of optical pumping atom magnetometer, realizes optical pumping atom magnetometer detection of magnetic field sensitivity
It improves.The configuration of the present invention is simple, it is easy to operate, it can be used for different types of atomic air chamber, it is portable strong, it is suitable for practical.
The above description is only a preferred embodiment of the present invention, is not intended to limit scope of patent protection of the invention, for
For those skilled in the art, the invention may be variously modified and varied.Within the spirit and principles in the present invention, all
Using any improvement or equivalent replacement made by description of the invention and accompanying drawing content, directly or indirectly it is used in other relevant
Technical field should all be included within the scope of the present invention.
Claims (10)
1. a kind of optical pumping atom magnetometer based on multi-way annular optical cavity, which is characterized in that including multi-way annular optical cavity module, visit
Survey light path module, magnetic field control module and signal analysis and Control module；
The multi-way annular optical cavity module includes atomic air chamber (11), incident hysteroscope (12), outgoing hysteroscope (13) and the first reflection
Mirror (14), the incidence hysteroscope (12) and outgoing hysteroscope (13) are separately positioned on the exploring laser light input path of atomic air chamber (11)
On exploring laser light emitting light path, first reflecting mirror (14) is for realizing exploring laser light in incident hysteroscope (12) and outgoing chamber
Roundtrip between mirror (13) is matched by orientation between incident hysteroscope (12), outgoing hysteroscope (13) and the first reflecting mirror (14)
It closes and realizes that exploring laser light repeatedly passes through atomic air chamber (11) back and forth；
The detection light path module includes detecting laser (21), the second polarization spectroscope (24), the first photodetector (25)
With the second photodetector (26), the detecting laser (21) is used for incident hysteroscope (12) emission detection laser, and described the
Two polarization spectroscopes (24) be used for by from outgoing hysteroscope (13) project exploring laser light be divided into two bundles the equal laser A of optical power and
Laser B, first photodetector (25) and the second photodetector (26) are separately positioned on the optical path of laser A and laser B
It goes up and is used to convert optical signal into voltage signal；
The magnetic field control module includes around the field coil (31) of atomic air chamber (11) setting and for controlling magnetic field line
The field drives source (32) that (31) generate magnetic field strength is enclosed, realizes the shielding external rings to atom by the field coil (31)
Border magnetic field and application function magnetic field；
The signal analysis and Control module and the first photodetector (25), the second photodetector (26), field drives source
(32) it is separately connected, calculates the magnetic field strength number that atomic spin is experienced by analyzing the signal from two photoelectric controllers
According to and issue magnetic field control signal.
2. the optical pumping atom magnetometer according to claim 1 based on multi-way annular optical cavity, which is characterized in that the signal
Analysis and Control module includes difference channel (41) and data processing server (42), and the difference channel (41) and the first photoelectricity are visited
The signal output end connection of device (25), the second photodetector (26) is surveyed, and for the output from two photodetectors
Signal does calculus of differences, and the data processing server (42) is separately connected with difference channel (41), field drives source (32), and
Signal is controlled for receiving to come from the operation result progress magnetic field signal resolving of difference channel (41) and issue corresponding magnetic field.
3. the optical pumping atom magnetometer according to claim 2 based on multi-way annular optical cavity, which is characterized in that further include using
In providing the pumping light path module of pump light for atomic air chamber (11), the pumping light path module includes for emitting pumping laser
Pump laser (51) and quarter-wave plate (55) for converting linearly polarized laser to circularly polarized laser.
4. the optical pumping atom magnetometer according to claim 3 based on multi-way annular optical cavity, which is characterized in that in the original
In sub- gas chamber (11), the optical path of pumping laser and the optical path of exploring laser light are vertically arranged.
5. the optical pumping atom magnetometer according to claim 4 based on multi-way annular optical cavity, which is characterized in that the pumping
Light path module further includes that beam expanding lens (56) between quarter-wave plate (55) and atomic air chamber (11) is arranged, pumping laser by
The beam expanding lens (56) irradiates entire atomic air chamber after expanding.
6. the optical pumping atom magnetometer according to claim 4 based on multi-way annular optical cavity, which is characterized in that the pumping
Light path module further includes third polarization spectroscope (52) and pumping laser controller (53), and the third polarization spectroscope (52) is used
In the pumping laser projected from pump laser (51) is divided into main beam and reference beam, wherein main beam is as injection atom
The pump light of gas chamber (11), reference beam feed back to choosing of pumping laser controller (53) realization to pump laser frequency and power
It selects and stablizes；
The detection light path module further includes the first polarization spectroscope (22) and exploring laser light controller (23), first polarization
Spectroscope (22) is used to the exploring laser light projected from detecting laser (11) being divided into main beam and reference beam, wherein main beam
The precession state of Measurement atom spin in atomic air chamber (11) is injected, reference beam feeds back to exploring laser light controller (23) realization
Selection and stabilization to exploring laser light frequency and power.
7. the optical pumping atom magnetometer according to claim 4 based on multi-way annular optical cavity, which is characterized in that the atom
The pumping laser emitting light path of gas chamber (11) is overlapped with the position of the first reflecting mirror (14), and the pumping light path module further includes light
Isolator (57), the optoisolator (57) are arranged on the pumping laser emitting light path of atomic air chamber (11) and are located at atom gas
Between room (11) and the first reflecting mirror (14), for avoiding pump light from turn resulting in atom certainly because reflex returns to atomic air chamber
Revolve polarization loss.
8. the optical pumping atom magnetometer according to claim 6 based on multi-way annular optical cavity, which is characterized in that the pumping
Light path module further includes second reflecting mirror (54) compact for realizing optical path.
9. the optical pumping atom magnetometer based on multi-way annular optical cavity described according to claim 1~any one of 8, feature
It is, the quantity of first reflecting mirror (14) is multiple；The incidence hysteroscope (12), outgoing hysteroscope (13) and the first reflecting mirror
(14) reflection angle can be adjusted individually.
10. the optical pumping atom magnetometer based on multi-way annular optical cavity according to any one of claim 2~8, special
Sign is, between the difference channel (41) and data processing server (42), the data processing server (42) and magnetic field
It is connected between driving source (32) by data line.
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| CN111538072A (en) * | 2020-05-28 | 2020-08-14 | 吉林大学 | Total field magnetic measurement device suitable for underground and temperature drift suppression method |
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| CN113466756A (en) * | 2021-05-18 | 2021-10-01 | 南方科技大学 | Magnetic field measurement method and atomic magnetometer system |
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| CN113447861A (en) * | 2021-06-30 | 2021-09-28 | 北京量子信息科学研究院 | Magnetic field measuring device |
| CN113625204A (en) * | 2021-08-09 | 2021-11-09 | 中国人民解放军军事科学院国防科技创新研究院 | Atomic magnetometer magnetic field measurement method based on particle swarm algorithm |
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| CN113625205B (en) * | 2021-08-09 | 2022-03-25 | 中国人民解放军军事科学院国防科技创新研究院 | Multichannel atomic magnetic field measuring device |
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| WO2024016371A1 (en) * | 2022-07-20 | 2024-01-25 | 北京昆迈医疗科技有限公司 | Miniaturized atom magnetometer |
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