CN210376655U - Optical pump atomic magnetometer based on multi-pass annular optical cavity - Google Patents
Optical pump atomic magnetometer based on multi-pass annular optical cavity Download PDFInfo
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- CN210376655U CN210376655U CN201921162361.0U CN201921162361U CN210376655U CN 210376655 U CN210376655 U CN 210376655U CN 201921162361 U CN201921162361 U CN 201921162361U CN 210376655 U CN210376655 U CN 210376655U
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Abstract
The utility model provides an optical pump atom magnetometer based on a multi-pass annular optical cavity, which comprises a multi-pass annular optical cavity module, a detection light path module, a magnetic field control module, a signal analysis control module and a pumping light path module; the multi-pass annular optical cavity module is used for realizing that detection laser repeatedly passes through an atomic gas chamber in a reciprocating mode, the detection light path module is used for realizing the detection process of the atomic spin precession state in a magnetic field and converting an optical signal into a voltage signal, the magnetic field control module is used for shielding an external environment magnetic field and generating a functional magnetic field for atoms, the signal analysis control module is used for reading and analyzing the voltage signal of the atomic spin precession state and feeding back and outputting a magnetic field control signal, and the pumping light path module is used for providing pumping light for the atomic gas chamber. The utility model discloses a multiple reflection detection laser has prolonged the functioning distance of atomic medium to detection laser, has strengthened signal output signal intensity, and then has improved the magnetic field detection sensitivity of optical pump atom magnetometer.
Description
Technical Field
The utility model relates to a magnetic field measurement technical field especially relates to an optical pump atom magnetometer based on many ways annular optical cavity.
Background
The high-precision magnetometer has very wide application in the technical fields of medical diagnosis, space science, mineral exploration, military anti-diving and the like. The atomic magnetometer is taken as the mainstream representative of the current high-precision magnetometer, and the basic working principle of the atomic magnetometer is that laser is utilized to read the motion state of atomic spin, and the motion state is closely related to the size of a magnetic field of the environment where the atoms are located; specifically, because the non-zero atomic spins have magnetic moments, and are subjected to the action of torque under the action of a magnetic field to precess around the direction of the magnetic field line at a fixed frequency, and the precession frequency is proportional to the magnitude of the magnetic field intensity, magnetic field data of the environment where the atoms are located can be obtained by observing the precession frequency of the atomic spins. Atomic magnetometers are therefore also referred to as optical magnetometers, and can be classified into the classes proton magnetometer, CPT atomic magnetometer, diamond color center atomic magnetometer, and optical pump atomic magnetometer, depending on the particular measurement principle.
For the optical pump atomic magnetometer, the measurement principle is as follows: the linear polarization direction of the emitted linear polarization laser is subjected to Faraday rotation after passing through polarized atoms, the rotating angle is called Faraday rotation angle, and the Faraday rotation angle is in direct proportion to the magnetic field intensity generated by atomic spin and the optical path length of a laser passing medium, so that the optical pump atomic magnetometer can read the precession frequency of atomic spin according to the Faraday rotation angle generated by the linear polarization laser, and the intensity data of the magnetic field to be measured can be obtained.
The existing optical pump atomic magnetometer is limited by the volume of equipment, and the acting distance (namely optical path length) of an atomic medium in an atomic gas chamber to detection laser is limited, so that the Faraday rotation angle generated by the online polarization direction of the detection laser is small, the signal intensity output by the optical pump atomic magnetometer is weak, and the sensitivity of magnetic field detection is greatly limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an increase laser passes through the optical path length of atomic medium and improves magnetic field detection sensitivity's optical pump atomic magnetometer to solve the problem that proposes in the background art.
In order to achieve the above object, the utility model provides an optical pump atomic magnetometer based on a multi-pass annular optical cavity, which comprises a multi-pass annular optical cavity module, a detection light path module, a magnetic field control module and a signal analysis control module;
the multi-pass annular optical cavity module comprises an atomic gas chamber, an incident cavity mirror, an emergent cavity mirror and a first reflecting mirror, wherein the incident cavity mirror and the emergent cavity mirror are respectively arranged on a detection laser incident light path and a detection laser emergent light path of the atomic gas chamber;
the detection light path module comprises a detection laser, a second polarization spectroscope, a first photoelectric detector and a second photoelectric detector, the detection laser is used for emitting detection laser to the incident cavity mirror, the second polarization spectroscope is used for dividing the detection laser emitted from the emergent cavity mirror into two beams of laser A and laser B with equal light power, and the first photoelectric detector and the second photoelectric detector are respectively arranged on the light paths of the laser A and the laser B and are used for converting optical signals into voltage signals;
the magnetic field control module comprises a magnetic field coil arranged around the atom air chamber and a magnetic field driving source for controlling the magnetic field coil to generate magnetic field intensity, and the magnetic field coil is used for shielding an external environment magnetic field and applying a functional magnetic field to atoms;
the signal analysis control module is respectively connected with the first photoelectric detector, the second photoelectric detector and the magnetic field driving source, and is used for solving magnetic field intensity data sensed by atomic spin by analyzing signals from the two photoelectric controllers and sending a magnetic field control signal.
Preferably, the signal analysis control module includes a differential circuit and a data processing server, the differential circuit is connected to the signal output ends of the first photodetector and the second photodetector, and is configured to perform differential operation on output signals from the two photodetectors, and the data processing server is connected to the differential circuit and the magnetic field driving source, and is configured to receive an operation result from the differential circuit, perform magnetic field signal calculation, and send a corresponding magnetic field control signal.
Preferably, the laser system further comprises a pump optical path module for providing pump light for the atomic gas chamber, wherein the pump optical path module comprises a pump laser for emitting pump laser light and a quarter wave plate for converting linearly polarized laser light into circularly polarized laser light.
Preferably, in the atom gas chamber, the optical path of the pumping laser is perpendicular to the optical path of the detection laser.
Preferably, the pumping optical path module further comprises a beam expander disposed between the quarter-wave plate and the atomic gas chamber, and the pumping laser irradiates the entire atomic gas chamber after being expanded by the beam expander.
Preferably, the pump light path module further includes a third polarization beam splitter and a pump laser controller, where the third polarization beam splitter is configured to split pump laser emitted from the pump laser into a main beam and a reference beam, the main beam is used as pump light incident into the atomic gas chamber, and the reference beam is fed back to the pump laser controller to implement selection and stabilization of frequency and power of the pump laser;
the detection light path module further comprises a first polarization spectroscope and a detection laser controller, wherein the first polarization spectroscope is used for dividing detection laser emitted from the detection laser into a main beam and a reference beam, the main beam is emitted into the atom air chamber to detect the precession state of atom spinning, and the reference beam is fed back to the detection laser controller to realize the selection and the stabilization of the frequency and the power of the detection laser.
Preferably, the pump laser outgoing light path of atom air chamber and the position coincidence of first speculum, pump light path module still includes optical isolator, optical isolator sets up on the pump laser outgoing light path of atom air chamber and lies in between atom air chamber and the first speculum for avoid the pump light to return atom air chamber and then cause atom spin polarization loss because of the reflex action.
Preferably, the pumping optical path module further includes a second mirror for achieving optical path compactness.
Preferably, the number of the first reflecting mirrors is plural; the reflection angles of the incident cavity mirror, the emergent cavity mirror and the first reflector can be independently adjusted.
Preferably, the differential circuit is connected with a data processing server and the data processing server is connected with a magnetic field driving source through data transmission lines.
The utility model provides a technical scheme has following beneficial effect at least:
1. the utility model discloses utilize atom air chamber, the incident chamber mirror, outgoing chamber mirror and first speculum constitute multi-pass annular optical cavity, survey laser and make a round trip to reflect and come and go through the atom air chamber many times between the incident chamber mirror, outgoing chamber mirror and first speculum, the effect distance of atom medium to surveying laser in the atom air chamber has been prolonged, the Faraday rotation angle of surveying laser linear polarization direction has been increased, and then optical pump atom magnetometer output signal's intensity has been strengthened, optical pump atom magnetometer's magnetic field detection sensitivity has been improved greatly.
2. The utility model discloses a set up position adjustable incident chamber mirror, outgoing chamber mirror and first speculum, can realize the adjustment to the route of marcing of surveying laser in the annular optical cavity of multipass, make the utility model discloses the annular optical cavity of multipass structure of structure is applicable to the atom air chamber of various different shapes, realizes the high accuracy measurement to magnetic field.
3. The utility model makes a large number of atoms in the atom air chamber in the same state by applying the optical pumping means, and the atom spins at the moment to obtain the same direction, which can effectively improve the signal intensity of the optical pump atom magnetometer; the utility model discloses a set up optical isolator for the pumping laser that jets out can not shine on the first speculum of multipass annular optical cavity module, and then avoids producing and leads to the pumping light to return the condition that the atomic air chamber caused atom spin polarization loss because of the reflex action.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts, wherein:
fig. 1 is a schematic diagram of module connection of an optical pump atomic magnetometer in embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of an optical pump atomic magnetometer in embodiment 1 of the present invention;
in the figure: 11 atomic gas chambers, 12 incident cavity mirrors, 13 emergent cavity mirrors and 14 first reflecting mirrors; a detection laser 21, a first polarization beam splitter 22, a detection laser controller 23, a second polarization beam splitter 24, a first photodetector 25 and a second photodetector 26; 31 magnetic field coil, 32 magnetic field driving source; 41 difference circuit, 42 data processing server; 51 pumping laser, 52 third polarizing beam splitter, 53 pumping laser controller, 54 second reflector, 55 quarter wave plate, 56 beam expander and 57 optical isolator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1:
referring to fig. 1-2 (arrows in the figures are laser passing direction or signal transmission direction), an optical pump atomic magnetometer based on a multi-pass annular optical cavity comprises a multi-pass annular optical cavity module, a detection optical path module, a magnetic field control module, a signal analysis control module and a pumping optical path module.
The multi-pass annular optical cavity module comprises an atom gas chamber 11, an incident cavity mirror 12, an emergent cavity mirror 13 and a first reflecting mirror 14. The atomic gas chamber 11 is a sealed light-transmitting gas chamber, the inside of the atomic gas chamber is packaged with alkali metal atomic steam and nitrogen, the incident cavity mirror 12 and the exit cavity mirror 13 are respectively arranged on a detection laser incident light path and a detection laser exit light path of the atomic gas chamber 11, and the atomic gas chamber is used for realizing back-and-forth reflection of detection laser between the incident cavity mirror 12 and the exit cavity mirror 13.
Specifically, the incident cavity mirror 12 and the exit cavity mirror 13 are both plated with antireflection films in the area near the axis thereof (i.e., in the circular range with the radius of 1 mm), and the other areas are both plated with high-reflection films. The detection laser enters the multi-pass annular optical cavity through the antireflection film area of the incident cavity mirror 12, and when the detection laser turns back and runs in the optical cavity, the reflection falling point of the laser is always positioned in the high-reflection film areas of the incident cavity mirror 12 and the emergent cavity mirror 13 until the detection laser irradiates the antireflection film area of the emergent cavity mirror 13 and leaves the multi-pass annular optical cavity.
In this embodiment, the number of the first reflectors 14 is one, and the first reflectors 14 are located on a central axis of a connecting line between the incident cavity mirror 12 and the exit cavity mirror 13, the first reflectors 14 are matched with the incident cavity mirror 12 and the exit cavity mirror 13 at positions to form an equilateral triangle structure, and the detection laser is reflected back and forth among the incident cavity mirror 12, the exit cavity mirror 13 and the first reflectors 14 by matching of reflection angles, so that the detection laser passes through the atomic gas chamber 11 back and forth many times.
In this embodiment, the reflection directions of the incident cavity mirror 12, the exit cavity mirror 13 and the first reflection mirror 14 for the detection laser can be independently adjusted, so that the traveling route of the detection laser in the multi-pass annular optical cavity can be adjusted.
The detection light path module comprises a detection laser 21, a first polarization beam splitter 22, a detection laser controller 23, a second polarization beam splitter 24, a first photodetector 25 and a second photodetector 26. The detection laser 21 is configured to emit detection laser to the incident cavity mirror 12, the first polarization beam splitter 22 is configured to split the detection laser emitted from the detection laser 11 into a main beam and a reference beam, where the reference beam is fed back to the detection laser controller 23 and used to implement selection and stabilization of frequency and power of the detection laser, the main beam is emitted into the atomic gas chamber 11 and used to detect a precession state of atomic spin, the main beam is emitted from the exit cavity mirror 13 after being reflected multiple times in the multi-pass annular optical cavity and split into two laser beams a and laser beam B having equal optical powers by the second polarization beam splitter 24, and the first photodetector 25 and the second photodetector 26 are respectively disposed on optical paths of the laser beam a and the laser beam B and used to convert an optical signal for atomic spin detection into a voltage signal.
The magnetic field control module includes a magnetic field coil 31 disposed around the atomic gas cell 11 and a magnetic field driving source 32 for controlling the magnetic field coil 31 to generate a magnetic field intensity. The magnetic field coil 31 is used for shielding the external environment magnetic field of the atom and applying a functional magnetic field, the application process of the functional magnetic field is the generation of an alternating excitation magnetic field required by the optical pump atomic magnetometer, and the alternating frequency of the magnetic field is equal to the spin precession frequency of the atomic spin under the action of the detection magnetic field.
The signal analysis control module includes a difference circuit 41 and a data processing server 42. The differential circuit 41 is connected to the signal output terminals of the first photodetector 25 and the second photodetector 26, and is configured to perform differential operation on output signals from the two photodetectors, and the data processing server 42 is connected to the differential circuit 41 and the magnetic field driving source 32, and is configured to receive an operation result from the differential circuit 41, perform magnetic field signal calculation, and send a corresponding magnetic field control signal to the magnetic field driving source 32.
In the present embodiment, the differential circuit 41 and the data processing server 42, and the data processing server 42 and the magnetic field driving source 32 are connected by data transmission lines. The data processing server 42 is a computer.
The pumping optical path module includes a pumping laser 51, a third pbs 52, a pumping laser controller 53, a second reflecting mirror 54, a quarter wave plate 55 and a beam expander 56. The pump laser 51 is configured to emit pump laser, the third polarization beam splitter 52 is configured to divide the pump laser emitted from the pump laser 51 into a main beam and a reference beam, where the reference beam is fed back to the pump laser controller 53 and used to implement selection and stabilization of frequency and power of the pump laser, the main beam sequentially passes through the second reflecting mirror 54, the quarter-wave plate 55 and the beam expander 56 and then enters the atomic gas chamber 11 as pump light, the quarter-wave plate 55 is configured to convert linearly polarized laser into circularly polarized laser, and the beam expander 56 is configured to expand the pump laser and then irradiate the entire atomic gas chamber.
In this embodiment, in the atomic gas chamber 11, the optical path of the pump laser and the optical path of the detection laser are vertically arranged, and the atomic gas chamber 11 is also located on the central axis of the connecting line between the incident cavity mirror 12 and the exit cavity mirror 13, so that the position of the pump laser exit optical path of the atomic gas chamber is exactly overlapped with the position of the first reflecting mirror 14.
In order to avoid the pumping light to return to the atom air chamber because of the reflection action and then cause atom spin polarization loss, in this embodiment, the pumping light path module further includes optical isolator 57, optical isolator 57 sets up on the pumping laser outgoing light path of atom air chamber 11 and is located between atom air chamber 11 and first speculum 14.
In this embodiment, the optical pump atomic magnetometer based on the multi-pass annular optical cavity has the following working process:
1) assembling the optical pump atomic magnetometer according to the laser passing sequence and the connection relation between the devices;
2) the pump laser emitted by the pump laser 51 is divided into a main beam and a reference beam after passing through the third polarization beam splitter 53, wherein the reference beam is fed back to the pump laser controller 53, the pump laser controller 53 sends a regulation signal to the pump laser 51, the main beam is converted into circularly polarized laser by linearly polarized laser after passing through the second reflecting mirror 54 and the quarter wave plate 55, the circularly polarized laser is emitted into the atomic gas chamber 11 after being expanded by the beam expander 56, and the pump light emitted from the atomic gas chamber 11 is blocked by the optical isolator 57;
3) the detection laser emitted by the detection laser 21 is divided into a main beam and a reference beam after passing through the first polarization beam splitter 22, wherein the reference beam is fed back to the detection laser controller 23, the detection laser controller 23 sends a regulation signal to the detection laser 21, and the main beam is emitted into the multi-pass annular optical cavity through the incident cavity mirror 12;
4) adjusting the reflection directions of the incident cavity mirror 12, the emergent cavity mirror 13 and the first reflector 14 to enable the main beam of the detection laser to be reflected back and forth among the incident cavity mirror 12, the emergent cavity mirror 13 and the first reflector 14, wherein the detection laser passes through the atomic gas chamber 11 for multiple times in the process and realizes the detection of the atomic spin precession state in the atomic gas chamber, and the detection laser is finally emitted through the emergent cavity mirror 13;
5) the emitted detection laser is divided into two laser beams A and B with equal optical power after passing through the polarization beam splitter 24, and the two laser beams A and B are respectively received by the first photoelectric detector 25 and the second photoelectric detector 26, and optical signals are converted into voltage signals through the photoelectric detectors;
6) the difference circuit 41 performs difference operation on output voltage signals from the two photoelectric detectors, the operation result is input into the data processing server 42, the precession frequency of atomic spin is obtained through the change frequency of the voltage signal, the magnetic field signal is resolved, and thus the magnetic field intensity sensed by the atomic spin is obtained, and the utility model discloses the high-sensitivity detection of the optical pump atomic magnetometer on the magnetic field is realized;
7) in addition, the data processing server 42 outputs a magnetic field control signal to the magnetic field driving source 32 to generate an alternating excitation magnetic field required by the optical pump atomic magnetometer, wherein the frequency of the magnetic field is equal to the spin precession frequency of the atomic spins under the action of the detection magnetic field.
The utility model discloses utilize many ways annular optical cavity structure, make the detection laser among the optical pump atom magnetometer come and go through the atom air chamber many times, prolonged the working medium to the range of detection laser, increased the Faraday rotation angle of surveying laser linear polarization direction, strengthened the signal output intensity of optical pump atom magnetometer, realized the improvement of optical pump atom magnetometer magnetic field detection sensitivity. The utility model discloses simple structure, convenient operation can be used to the atom air chamber of different grade type, and portability is strong, is suitable for the practicality.
The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention. Any improvement or equivalent replacement made by utilizing the contents of the specification and the drawings of the present invention can be directly or indirectly applied to other related technical fields within the spirit and principle of the present invention, and shall be included in the scope of the present invention.
Claims (10)
1. An optical pump atomic magnetometer based on a multi-pass annular optical cavity is characterized by comprising a multi-pass annular optical cavity module, a detection light path module, a magnetic field control module and a signal analysis control module;
the multi-pass annular optical cavity module comprises an atomic air chamber (11), an incident cavity mirror (12), an emergent cavity mirror (13) and a first reflecting mirror (14), wherein the incident cavity mirror (12) and the emergent cavity mirror (13) are respectively arranged on a detection laser incident light path and a detection laser emergent light path of the atomic air chamber (11), the first reflecting mirror (14) is used for realizing the back-and-forth reflection of detection laser between the incident cavity mirror (12) and the emergent cavity mirror (13), and the detection laser can repeatedly pass through the atomic air chamber (11) in a back-and-forth way through the cooperation of the directions of the incident cavity mirror (12), the emergent cavity mirror (13) and the first reflecting mirror (14);
the detection light path module comprises a detection laser (21), a second polarization beam splitter (24), a first photoelectric detector (25) and a second photoelectric detector (26), the detection laser (21) is used for emitting detection laser to the incident cavity mirror (12), the second polarization beam splitter (24) is used for dividing the detection laser emitted from the emergent cavity mirror (13) into two beams of laser A and laser B with equal optical power, and the first photoelectric detector (25) and the second photoelectric detector (26) are respectively arranged on the light paths of the laser A and the laser B and are used for converting optical signals into voltage signals;
the magnetic field control module comprises a magnetic field coil (31) arranged around the atom gas chamber (11) and a magnetic field driving source (32) used for controlling the magnetic field coil (31) to generate magnetic field intensity, and the magnetic field coil (31) is used for shielding external environment magnetic field and applying functional magnetic field to atoms;
the signal analysis control module is respectively connected with the first photoelectric detector (25), the second photoelectric detector (26) and the magnetic field driving source (32), calculates magnetic field intensity data sensed by atomic spin by analyzing signals from the two photoelectric controllers and sends out a magnetic field control signal.
2. The optical pump atomic magnetometer based on the multi-pass annular optical cavity according to claim 1, wherein the signal analysis control module comprises a differential circuit (41) and a data processing server (42), the differential circuit (41) is connected to signal output ends of the first photodetector (25) and the second photodetector (26) and is used for performing differential operation on output signals from the two photodetectors, and the data processing server (42) is respectively connected to the differential circuit (41) and the magnetic field driving source (32) and is used for receiving an operation result from the differential circuit (41), performing magnetic field signal calculation and sending out a corresponding magnetic field control signal.
3. The optical pumping atomic magnetometer based on the multi-pass ring optical cavity according to claim 2, further comprising a pump optical path module for providing pump light to the atomic gas cell (11), wherein the pump optical path module comprises a pump laser (51) for emitting pump laser light and a quarter wave plate (55) for converting linearly polarized laser light into circularly polarized laser light.
4. The optical pumping atomic magnetometer based on the multi-pass annular optical cavity according to claim 3, wherein the optical path of the pumping laser is perpendicular to the optical path of the detection laser in the atomic gas chamber (11).
5. The optical pumping atomic magnetometer based on the multi-pass ring optical cavity according to claim 4, wherein the pumping optical path module further comprises a beam expander (56) disposed between the quarter wave plate (55) and the atomic gas chamber (11), and the pumping laser is expanded by the beam expander (56) and irradiates the whole atomic gas chamber.
6. The optical pumping atomic magnetometer based on the multi-pass ring optical cavity of claim 4, wherein the pumping optical path module further comprises a third polarization beam splitter (52) and a pumping laser controller (53), the third polarization beam splitter (52) is configured to split the pumping laser emitted from the pumping laser (51) into a main beam and a reference beam, wherein the main beam is used as the pumping light emitted into the atomic gas cell (11), and the reference beam is fed back to the pumping laser controller (53) to realize the selection and stabilization of the frequency and power of the pumping laser;
the detection light path module further comprises a first polarization beam splitter (22) and a detection laser controller (23), wherein the first polarization beam splitter (22) is used for splitting detection laser emitted from the detection laser (21) into a main beam and a reference beam, the main beam is emitted into the atom air chamber (11) to detect the precession state of atom spinning, and the reference beam is fed back to the detection laser controller (23) to realize the selection and stabilization of the frequency and the power of the detection laser.
7. The optical pump atomic magnetometer based on multi-pass annular optical cavity of claim 4, characterized in that, the position coincidence of the pump laser emergent light path of atomic gas chamber (11) and first speculum (14), the pump light path module still includes optical isolator (57), optical isolator (57) set up on the pump laser emergent light path of atomic gas chamber (11) and lie in between atomic gas chamber (11) and first speculum (14), are used for avoiding the pump light to return atomic gas chamber and then cause atom spin polarization loss because of the reflex action.
8. The optical pumping atomic magnetometer based on the multi-pass annular optical cavity according to claim 6, wherein the pumping optical path module further comprises a second mirror (54) for realizing optical path compactness.
9. The optical pumping atomic magnetometer according to any one of claims 1 to 8, wherein the number of the first reflecting mirrors (14) is multiple; the reflection angles of the incident cavity mirror (12), the emergent cavity mirror (13) and the first reflector (14) can be independently adjusted.
10. The multi-pass annular optical cavity-based optical pump atomic magnetometer according to any one of claims 2 to 8, wherein the difference circuit (41) and the data processing server (42) and the magnetic field driving source (32) are connected through data transmission lines.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261797A (en) * | 2019-07-23 | 2019-09-20 | 中国人民解放军军事科学院国防科技创新研究院 | A kind of optical pumping atom magnetometer based on multi-way annular optical cavity |
| CN115508758A (en) * | 2022-10-21 | 2022-12-23 | 国仪量子(合肥)技术有限公司 | Optical path system of optical detection magnetic resonance device and optical detection magnetic resonance device |
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2019
- 2019-07-23 CN CN201921162361.0U patent/CN210376655U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261797A (en) * | 2019-07-23 | 2019-09-20 | 中国人民解放军军事科学院国防科技创新研究院 | A kind of optical pumping atom magnetometer based on multi-way annular optical cavity |
| CN110261797B (en) * | 2019-07-23 | 2024-06-14 | 中国人民解放军军事科学院国防科技创新研究院 | Optical pump atomic magnetometer based on many Cheng Huanxing optical cavities |
| CN115508758A (en) * | 2022-10-21 | 2022-12-23 | 国仪量子(合肥)技术有限公司 | Optical path system of optical detection magnetic resonance device and optical detection magnetic resonance device |
| CN115508758B (en) * | 2022-10-21 | 2024-10-01 | 国仪量子技术(合肥)股份有限公司 | Optical path system of optical detection magnetic resonance device and optical detection magnetic resonance device |
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