CN216206402U - Compact atomic interferometer integrates device - Google Patents
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- CN216206402U CN216206402U CN202122761180.3U CN202122761180U CN216206402U CN 216206402 U CN216206402 U CN 216206402U CN 202122761180 U CN202122761180 U CN 202122761180U CN 216206402 U CN216206402 U CN 216206402U
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Abstract
The utility model discloses a compact atomic interferometer integration device which comprises a cold atomic interferometer physical system, a cooling optical module, a Raman optical module, a fluorescence detection and collection device and the like. The utility model utilizes the structure of a single decahedron vacuum glass cavity and combines the collimation beam expander, the magnetic field coil and the like to be effectively integrated. The decahedral vacuum glass cavity body avoids the defects of induced current, induced magnetic field and the like in a metal vacuum cavity, and has larger light-passing area and smaller volume; the cooling optical module and the Raman optical module are simpler than the existing optical system for realizing atomic interference, the optical path structure is simplified, and the optical path cost is reduced; the cube vacuum cavity of the whole device is independent from peripheral devices, the cooling optical module and the Raman optical module can be independently debugged and then assembled and integrated, and the device is suitable for glass cavity devices with different structures. The utility model can be applied to the high-precision atomic inertia sensing technology and improves the integration level of the sensor.
Description
Technical Field
The utility model relates to a high-precision atomic inertia sensing technology, in particular to a compact cold atom interferometer integration device which is suitable for the field of atomic interference precision measurement.
Background
Atomic interferometers are being used in fields such as inertial navigation, geological exploration, resource exploration, and basic scientific research. An atomic interferometer system built on an optical platform based on a laboratory generally has large volume and poor portability, and in order to meet engineering and space applications, a miniaturized portable atomic interferometer device needs to be developed.
The atom interferometer device comprises a vacuum cavity, a collimation laser module, a detection module and the like, and the atom interference process comprises the processes of trapping, cooling, falling, interference, detection and the like of atomic groups. Need integrated vacuum cavity, fiber collimator, printing opacity glass window piece, anti helmholtz coil and helmholtz coil, fluorescence detection collection device etc. for satisfying the atom interference condition, consequently how on the basis of satisfying atom interferometer physical principle, unit module is an important problem that atom interferometer device faces above the high-efficient integration. At present, most of atomic interferometers adopt a metal vacuum cavity structure, a glass window is sealed and connected on a metal cavity for light transmission, and the metal cavity has a much larger volume and weight than the glass cavity under the condition of realizing the same light transmission aperture due to the sealing of a knife edge and the position of a fixed screw in the sealing process; factors such as induced current and induced magnetic field existing in the metal vacuum cavity can interfere the atom interference process, and need to be avoided as much as possible; anti helmholtz coil and helmholtz coil's size is subject to vacuum chamber's size, and the glass cavity can effectively reduce vacuum seal part's size, reduces vacuum chamber's volume, reduces anti helmholtz coil and helmholtz coil's size through reasonable design simultaneously, consequently to the demand of miniaturized atom interferometer in the practical application, still has the space of improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a compact cold atom interferometer integration device aiming at the requirement of the prior art on miniaturization atom interferometers. The utility model utilizes the structure of a single decahedron vacuum glass cavity, combines effective integration of devices such as an optical fiber collimator and a magnetic field coil, independently debugs the light-transmitting cooling light and the Raman optical module, and then assembles the light-transmitting cooling light and the Raman optical module with the glass cavity, wherein the device modules are mutually independent, thereby realizing a miniaturized atomic interferometer system which can be used in the field of atomic interference precision measurement.
The above object of the present invention is achieved by the following technical solutions:
a compact atomic interferometer integration device comprises a physical system, wherein the physical system comprises a decahedron vacuum glass cavity, the decahedron vacuum glass cavity comprises a first side circular glass window, a second side circular glass window, a third side circular glass window, a fourth side circular glass window, a fifth side circular glass window, a sixth side circular glass window, a seventh side circular glass window and an eighth side circular glass window which are uniformly and sequentially distributed in the circumferential direction, the decahedron vacuum glass cavity further comprises a front circular light-transmitting window sheet and a rear circular light-transmitting window sheet,
the outer sides of the first side circular glass window, the second side circular glass window, the third side circular glass window, the fourth side circular glass window, the fifth side circular glass window, the sixth side circular glass window and the seventh side circular glass window are respectively provided with a first collimation beam expander, a beam expanding shaper, a second collimation beam expander, a fluorescence detection and collection device, a third collimation beam expander, a first reflection device and a fourth collimation beam expander, the outer side of the front circular light-transmitting window sheet is provided with the fifth collimation beam expander, the outer side of the rear circular light-transmitting window sheet is provided with the second reflection device,
the eighth side circular glass window is connected with one end of a glass tube, the other end of the glass tube is connected with a base, the base is in sealing connection with a metal flange, a right side window of the cube vacuum cavity is in sealing connection with the metal flange, an alkali metal releasing agent is welded on the right side window of the cube vacuum cavity through a vacuum connector, and an ion pump is fixed on the front side window of the cube vacuum cavity.
An anti-Helmholtz coil and a Helmholtz coil are arranged outside the decahedron vacuum glass cavity.
The emergent optical axes of the first collimation beam expander and the third collimation beam expander are collinear, the emergent optical axes of the second collimation beam expander and the fourth collimation beam expander are collinear, the emergent optical axis of the beam expanding shaper is collinear with the reflected light of the first reflection device, and the emergent optical axis of the fifth collimation beam expander is collinear with the reflected light of the second reflection device.
The first reflecting device comprises a first outer quarter wave plate and a first outer reflector, the emergent optical axis of the beam expanding shaper is sequentially perpendicular to the second side circular glass window, the sixth side circular glass window and the first outer reflector, and the first outer quarter wave plate is positioned between the sixth side circular glass window and the first outer reflector outside the sixth side circular glass window;
the second reflecting device comprises a second outer quarter wave plate and a second outer reflecting mirror, the emergent optical axis of the fifth collimation beam expander is sequentially vertical to the front circular light-transmitting window sheet, the rear circular light-transmitting window sheet and the second outer reflecting mirror, and the second outer quarter wave plate is located between the rear circular light-transmitting window sheet and the second outer reflecting mirror on the outer side of the rear circular light-transmitting window sheet.
The compact atomic interferometer integrated device also comprises an optical system, wherein the optical system comprises a cooling optical module,
the cooling optical module comprises a cooling light laser, single-frequency laser generated by the cooling light laser is divided into two beams of single-frequency laser after passing through the first light splitting unit, one beam of single-frequency laser is output to the first frequency stabilizing unit, the other beam of single-frequency laser obtains cooling light through the first laser power amplifying unit and the first acousto-optic modulator unit, and the cooling light is divided into first cooling light to fifth cooling light through the light splitting and shaping unit and enters the first collimating beam expander to the first collimating beam expander respectively.
The optical system further includes a raman optical module, where the raman optical module includes a first raman optical laser and a second raman optical laser, a first raman light output by the first raman optical laser is divided into two beams by a second light splitting unit, a part of the first raman light is output to a second frequency stabilization unit, the remaining first raman light is input to a second laser power amplification unit and output by the second raman optical laser to form a second raman optical beam to obtain a combined beam raman light, a part of the combined beam raman light is input to a beat frequency phase locking unit, the remaining combined beam raman light passes through a second optical modulator unit to obtain an output raman light, and the output raman light is transmitted to a beam expanding shaper through a beam combining and shaping unit.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a compact atom interferometer integration device, which utilizes the structure of a single decahedron vacuum glass cavity and combines effective integration of a collimation beam expander, a magnetic field coil, a fluorescence detection and collection device and the like, and can realize the functions of atom three-dimensional magneto-optical trapping, cooling, atom control and the like. Compared with the traditional metal cavity scheme, the decahedral vacuum glass cavity avoids the defects of induced current, induced magnetic field, gas permeation and the like in a metal vacuum cavity, and has larger light-passing area and smaller volume; the optical module comprises 8 units, is simpler than the existing optical system for realizing atomic interference, simplifies the optical path structure and reduces the optical path cost; the vacuum cavity of the whole device is independent from peripheral devices, and modules such as cooling light, Raman light and the like can be independently debugged and then assembled and integrated, so that the device is suitable for glass cavity devices with different structures. The utility model can be applied to the high-precision atomic inertia sensing technology and improves the integration level of the sensor.
Drawings
FIG. 1 is a schematic diagram of a decahedral vacuum glass chamber of a compact cold atom interferometer;
FIG. 2 is a schematic diagram of a physical system of a compact cold atom interferometer;
FIG. 3 is a front view (y-z) and a side view (x-z) of the optical path structure of the compact cold atom interferometer, where (a) is a front view; (b) is a side view;
fig. 4 is a schematic diagram of a cooling optical module and a raman optical module of the compact cold atom interferometer, wherein (a) is a schematic diagram of the cooling optical module; (b) is a schematic diagram of a Raman optical module;
FIG. 5 is a co-directional interference fringe of a compact cold atom interferometer;
in the figure: 100-decahedron vacuum glass cavity, 101-glass window, 102-window sheet, 103-alkali metal releasing agent, 104-glass tube, 105-copper gasket, 106-base, 201-first collimation beam expander, 202-second collimation beam expander, 203-third collimation beam expander, 204-fourth collimation beam expander, 205-fifth collimation beam expander, 3-anti Helmholtz coil, 4-Helmholtz coil, 501-first reflection device, 502-second reflection device and 6-fluorescence detection and collection device; 7-beam expanding shaper, 800-supporting and fixing module, 801-metal flange, 802-right side window of a cube vacuum cavity, 803-front side window of the cube vacuum cavity, 804-cube vacuum cavity, 9-ion pump, C1-first cooling light, C2-second cooling light, C3-third cooling light, C4-fourth cooling light, C5-fifth cooling light and R-Raman light.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples for the purpose of facilitating understanding and practicing the utility model by those of ordinary skill in the art, it being understood that the examples described herein are for the purpose of illustration and explanation, and are not to be construed as limiting the utility model.
The implementation case is as follows:
in this embodiment, the integrated device of the compact atomic interferometer includes a physical system and an optical system, the physical system of the compact atomic interferometer includes a decahedron vacuum glass cavity 100, an alkali metal releasing agent 103, a collimating beam expander 201 and 204 through which cooling light C1-C5 passes, a helmholtz coil 3, an anti-helmholtz coil 4, a first reflecting device, a second reflecting device, a fluorescence detection and collection device 6, a beam expanding shaper 7 through which raman light R passes, a supporting and fixing module 800, an ion pump 9, and the like.
As shown in fig. 1, the decahedral vacuum glass chamber 100 includes eight side circular glass windows 101 and front and rear circular light-transmitting window pieces 102 uniformly distributed in the circumferential direction, and antireflection films are respectively coated on the surfaces of the eight side circular glass windows 101 and the front and rear circular light-transmitting window pieces 102 to prevent unnecessary reflection of laser beams in the chamber from affecting the measurement. The eight side circular glass windows 101 are a first side circular glass window, a second side circular glass window, a third side circular glass window, a fourth side circular glass window, a fifth side circular glass window, a sixth side circular glass window, a seventh side circular glass window and an eighth side circular glass window in turn according to a circumferential one-way sequence (clockwise direction in fig. 2), and the front and rear circular light-transmitting window pieces 102 are a front circular light-transmitting window piece and a rear circular light-transmitting window piece respectively. The eighth side circular glass window is connected with one end of the glass tube 104, the other end of the glass tube 104 is connected with the base 106, the base 106 is hermetically connected with the metal flange 801, as a preferable scheme, the copper gasket 105 on the right side of the base 106 and the metal flange 801 on the left side of the base 106 are hermetically sealed and connected to the cube vacuum cavity 804 in a vacuum mode, the right side window 802 of the cube vacuum cavity 804 is hermetically connected with the metal flange 801, the right side window 802 of the cube vacuum cavity 804 is further welded with the alkali metal releasing agent 103 through a vacuum connector to provide an alkali metal atom source for the atom interferometer, and the ion pump 9 is fixed on the front side window 803 of the cube vacuum cavity 804 to maintain the vacuum of the vacuum cavity.
The outer side of the first side circular glass window, the outer side of the second side circular glass window, the outer side of the third side circular glass window, the outer side of the fourth side circular glass window, the outer side of the fifth side circular glass window, the outer side of the sixth side circular glass window and the outer side of the seventh side circular glass window are respectively provided with a first collimation beam expander 201, a beam expanding shaper 7, a second collimation beam expander 202, a fluorescence detection and collection device 6, a third collimation beam expander 203, a first reflection device 501 and a fourth collimation beam expander 204, the outer side of the front circular light-passing window sheet is provided with a fifth collimation beam expander 205, and the outer side of the rear circular light-passing window sheet is provided with a second reflection device 502.
As shown in fig. 2 and 3, the first collimating beam expander 201, the second collimating beam expander 202, the third collimating beam expander 203, the fourth collimating beam expander 204, and the fifth collimating beam expander 205 are respectively configured to generate first cooling light C1, second cooling light C2, third cooling light C3, fourth cooling light C4, and fifth cooling light C5, and each of the first collimating beam expander, the second collimating beam expander, the third collimating beam expander, and the fifth collimating beam expander 205 includes a fiber collimator, a beam expander, an internal quarter wave plate, and an internal reflector, which are sequentially disposed in sequence. The optical fiber collimator and the beam expander in the collimation beam expander (201-205) are fixed in front of the internal quarter-wave plate and the internal reflector in the collimation beam expander (201-205) and used for adjusting the collimation degree and the spot size of the cooling light (C1-C5), and the internal quarter-wave plate and the internal reflector adjust the polarization and the direction of the cooling light (C1-C5). Each of the collimating beam expanders (201-205) is fixed on the rear panel by a supporting and fixing base 800, wherein an exit optical axis of the first collimating beam expander 201 is perpendicular to the first side circular glass window, an exit optical axis of the second collimating beam expander 202 is perpendicular to the third side circular glass window, an exit optical axis of the third collimating beam expander 203 is perpendicular to the fifth side circular glass window, and an exit optical axis of the fourth collimating beam expander 204 is perpendicular to the seventh side circular glass window.
The second reflecting device 502 comprises a second external quarter-wave plate and a second external reflector, the exit optical axis of the fifth collimating beam expander 205 is perpendicular to the front circular light-transmitting window, the rear circular light-transmitting window and the second external reflector of the decahedron vacuum chamber 100 in sequence, and the second external quarter-wave plate is located between the rear circular light-transmitting window and the second external reflector outside the rear circular light-transmitting window.
The distances between the emergent optical axes of the first collimation beam expander 201, the second collimation beam expander 202, the third collimation beam expander 203, the fourth collimation beam expander 204 and the fifth collimation beam expander 205 and the distances between the emergent optical axes of the first collimation beam expander, the second collimation beam expander 202, the third collimation beam expander 203, the fourth collimation beam expander 204 and the fifth collimation beam expander 205 and between the emergent optical axes of the first collimation beam expander, the second collimation beam expander 205 and the first side circular glass window, the third side circular glass window, the fifth side circular glass window, the seventh side circular glass window and the rear circular light-transmitting window sheet are about 4cm respectively, and the propagation distance and the optical power loss of each light beam are reduced.
The beam expanding shaper 7 comprises a fiber collimator, a beam expander and a shaper. The optical fiber collimator, the beam expander and the shaper are sequentially fixed in the beam expanding shaper 7, the beam expanding shaper 7 is vertically fixed at the upper end of the rear panel through a supporting and fixing base 800, the first reflecting device 501 comprises a first external quarter-wave plate and a first external reflector, the emergent optical axis of the beam expanding shaper 7 is sequentially perpendicular to the second side circular glass window, the sixth side circular glass window and the first external reflector, the distance between the beam expanding shaper 7 and the second side circular glass window is about 2cm, and the first external quarter-wave plate is located between the sixth side circular glass window and the first external reflector outside the sixth side circular glass window.
The fluorescence detection and collection device 6 comprises a photoelectric detector and a signal amplification circuit, the detection light axis of the front photoelectric detector is perpendicular to the fourth side round glass window of the decahedron vacuum glass cavity 100, the distance is 2cm, the fluorescence detection and collection device 6 is fixed on the rear panel, and the rear amplification circuit converts the current signal output by the photoelectric detector into a voltage signal and amplifies the voltage signal by 107The response time is 1.8ms, the detection noise is 10mV, and the experimental conditions are met for collecting the fluorescence signals of the atom stimulated radiation.
The spatial light path structure includes: the first cooling light C1-the fourth cooling light C4 after being expanded and collimated by the first collimation beam expander 201, the second collimation beam expander 202, the third collimation beam expander 203 and the fourth collimation beam expander 204 are respectively vertical to a first side circular glass window, a third side circular glass window, a fifth side circular glass window and a seventh side circular glass window which are respectively incident into the decahedron vacuum glass cavity 100 at 90 degrees, the fifth cooling light C5 after being expanded and collimated by the fifth collimation beam expander 205 is vertical to a front circular light-transmitting window sheet and a rear circular light-transmitting window sheet of the decahedron vacuum cavity 100 and is vertically incident onto a second outer quarter wave plate and a second outer reflector 502, the second outer reflector 502 is adjusted to enable the original path of the fifth cooling light C5 to return to the fifth collimation beam expander 205, wherein the light path trajectories of the first cooling light C1 and the third cooling light C3 in the decahedron vacuum glass cavity 100 are overlapped, the optical path tracks of the second cooling light C2 and the fourth cooling light C4 in the decahedron vacuum glass cavity 100 are overlapped, the optical path track of the fifth cooling light C5 is overlapped with the optical path track of the original reflected light, and the cooling light of 3 pairs of circularly polarized light required by the second outer quarter-wave plate to form a magneto-optical trap is adjusted. The raman light R passing through the beam expanding shaper 7 enters the decahedron vacuum glass cavity 100 perpendicular to the second side circular glass window by 90 degrees, and then exits to the first external quarter wave plate and the first external reflector 5 perpendicular to the sixth side circular glass window by 90 degrees, and the first external reflector is adjusted to return the original path of the raman light R to enter the beam expanding shaper 7, so that the correlation raman light required by raman transition is generated.
The outside 100 of the decahedron vacuum glass cavity is provided with a magnetic field coil, and the magnetic field coil comprises an anti-Helmholtz coil 3 and a Helmholtz coil 4. The helmholtz coil 4 includes an x-direction compensation magnetic field coil, a y-direction compensation magnetic field coil, and a z-direction compensation magnetic field coil. The anti-Helmholtz coil 3 and the x-direction compensation magnetic field coil are circular coils, and the y-direction compensation magnetic field coil and the z-direction compensation magnetic field coil are rectangular coils. The axis of the anti-Helmholtz coil 3 is perpendicular to the front circular light-transmitting window sheet and the rear circular light-transmitting window sheet and is fixed, the axis y of the x-direction compensation magnetic field coil is parallel to the axis of the anti-Helmholtz coil 3 and is fixed, the vertical middle axis of the y-direction compensation magnetic field coil is parallel to the front circular light-transmitting window sheet and the rear circular light-transmitting window sheet and is fixed, the vertical middle axis of the z-direction compensation magnetic field coil is perpendicular to the front circular light-transmitting window sheet and the rear circular light-transmitting window sheet and is fixed, the radius and the coil spacing ratio of each coil are limited by the geometric size of a vacuum device, the condition that the space is reduced to the maximum extent and the magnetic field condition is still met to generate a gradient magnetic field and a compensation magnetic field is guaranteed, and extra magnetic shielding equipment is not required.
As shown in fig. 4, the optical system includes a cooling optical module and a raman optical module.
The cooling optical module comprises a cooling optical laser, the cooling optical laser generates single-frequency laser, the single-frequency laser generated by the cooling optical laser 10 is divided into two beams of single-frequency laser after passing through a first light splitting unit, one beam of the single-frequency laser is output to a first frequency stabilizing unit corresponding to the cooling optical laser, the first frequency stabilizing unit controls the single-frequency laser generated by the cooling optical laser to be locked on the transition frequency of the cooling light of the alkali metal D2 line, the other beam of the single-frequency laser obtains cooling light required by an experiment through a first laser power amplifying unit and a first acousto-optic modulator unit, and finally the cooling light is divided into first cooling light-fifth cooling light through a light splitting and shaping unit to enter a first collimating beam expander 201-a fifth collimating beam expander 205 of a physical system of the atomic interferometer.
The Raman optical module comprises a first Raman optical laser and a second Raman optical laser, a first Raman light output by the first Raman optical laser is divided into two beams after passing through the second light splitting unit, wherein, part of the first Raman light is output to a second frequency stabilization unit corresponding to the first Raman light laser unit, the second frequency stabilization unit is used for controlling and stabilizing the frequency of the first Raman light, the rest of the first Raman light is input to a second laser power amplification unit and output by a second Raman light laser to form a combined beam of Raman light, a small part of the combined beam of Raman light is input to a beat frequency phase-locking unit, the frequency of the first Raman light and the second Raman light is controlled to be locked at a fixed frequency difference, the rest of the combined beam of Raman light is output by a second sound modulator unit, and finally the output Raman light is connected with a high-power polarization-maintaining optical fiber through a combined beam shaping unit and is transmitted to a beam expanding shaper 7 of a physical system of the atomic interferometer;
the implementation effect is as follows:
in this embodiment, the physical system has a length, width and height of266mm X180 mm X270 mm. The cooling temperature of atoms in a single decahedral vacuum glass cavity is lower than 10 mu K, and the number of trapped atoms is not less than 107And s. The surface of the decahedron vacuum glass cavity is plated with an antireflection film, the cooling light transmittance is better than 99.9%, the light power loss is better than 3%, and the light beam power stability is 1.1%, so that the stability and the vibration resistance of a vacuum system can be greatly improved; the optical module is output through each unit optical fiber, the number of lasers is reduced through the beat frequency phase-locking unit, the phase noise of Raman light is smaller than-80 dBc @60Hz within the frequency spectrum range of 10-100Hz, the output power of the first Raman light and the second Raman light is higher than 500mw, the power stability is 2.8%, the fringe contrast of a homodromous interferometer is 83%, meanwhile, the system is more compact, the optical path is highly stable, and the resistance of the optical path system to temperature change and environmental airflow change is improved. The utility model can meet the engineering requirements of miniaturized cold atom inertia devices.
Laser cooling of atoms in atomic interferometers, vacuum techniques, atomic interference are common techniques and are not discussed in detail in this patent.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (5)
1. A compact atom interferometer integration device comprises a physical system and is characterized in that the physical system comprises a decahedron vacuum glass cavity (100), the decahedron vacuum glass cavity (100) comprises a first side circular glass window, a second side circular glass window, a third side circular glass window, a fourth side circular glass window, a fifth side circular glass window, a sixth side circular glass window, a seventh side circular glass window and an eighth side circular glass window which are uniformly and sequentially distributed in the circumferential direction, the decahedron vacuum glass cavity (100) further comprises a front circular light-transmitting window sheet and a rear circular light-transmitting window sheet,
the outer sides of the first side circular glass window, the second side circular glass window, the third side circular glass window, the fourth side circular glass window, the fifth side circular glass window, the sixth side circular glass window and the seventh side circular glass window are respectively provided with a first collimation beam expander (201), a beam expanding shaper (7), a second collimation beam expander (202), a fluorescence detection collecting device (6), a third collimation beam expander (203), a first reflecting device (501) and a fourth collimation beam expander (204), the outer side of the front circular light-transmitting window sheet is provided with the fifth collimation beam expander (205), the outer side of the rear circular light-transmitting window sheet is provided with the second reflecting device (502),
the eighth side round glass window is connected with one end of a glass tube (104), the other end of the glass tube (104) is connected with a base (106), the base (106) is hermetically connected with a metal flange (801), a right side window (802) of a cube vacuum cavity (804) is hermetically connected with the metal flange (801), the right side window (802) of the cube vacuum cavity (804) is welded with an alkali metal releasing agent (103) through a vacuum connector, an ion pump (9) is fixed on a front side window (803) of the cube vacuum cavity (804),
an anti-Helmholtz coil (3) and a Helmholtz coil (4) are arranged outside the decahedron vacuum glass cavity (100).
2. The compact atomic interferometer integrated device of claim 1, wherein the exit optical axes of the first collimating beam expander (201) and the third collimating beam expander (203) are collinear, the exit optical axes of the second collimating beam expander (202) and the fourth collimating beam expander (204) are collinear, the exit optical axis of the beam expanding shaper (7) is collinear with the reflected light of the first reflecting device (501), and the exit optical axis of the fifth collimating beam expander (205) is collinear with the reflected light of the second reflecting device (502).
3. The compact atomic interferometer integrated device of claim 1, wherein the first reflecting device (501) comprises a first outer quarter wave plate and a first outer reflector, the emergent optical axis of the beam expanding shaper (7) is perpendicular to the second side circular glass window, the sixth side circular glass window and the first outer reflector in sequence, and the first outer quarter wave plate is positioned between the sixth side circular glass window and the first outer reflector outside the sixth side circular glass window;
the second reflecting device (502) comprises a second outer quarter wave plate and a second outer reflecting mirror, the emergent optical axis of the fifth collimation beam expander (205) is sequentially vertical to the front circular light-transmitting window sheet, the rear circular light-transmitting window sheet and the second outer reflecting mirror, and the second outer quarter wave plate is positioned between the rear circular light-transmitting window sheet and the second outer reflecting mirror on the outer side of the rear circular light-transmitting window sheet.
4. The integrated compact atomic interferometer apparatus of claim 1, further comprising an optical system, the optical system comprising a cooling optical module,
the cooling optical module comprises a cooling light laser, single-frequency laser generated by the cooling light laser is divided into two beams of single-frequency laser after passing through the first light splitting unit, one beam of single-frequency laser is output to the first frequency stabilizing unit, the other beam of single-frequency laser obtains cooling light through the first laser power amplifying unit and the first acousto-optic modulator unit, and the cooling light is divided into first cooling light to fifth cooling light through the light splitting and shaping unit and enters the first collimating beam expander (201) to the fifth collimating beam expander (205) respectively.
5. The integrated device of the compact atomic interferometer according to claim 4, wherein the optical system further includes a raman optical module, the raman optical module includes a first raman optical laser and a second raman optical laser, a first raman light output from the first raman optical laser is divided into two beams by a second light splitting unit, a part of the first raman light is output to the second frequency stabilization unit, the remaining first raman light is input to the second laser power amplification unit and output from the second raman optical laser to form a combined beam of raman light, a part of the combined beam of raman light is input to the beat frequency phase locking unit, the remaining combined beam of raman light passes through the second optical modulator unit to form an output raman light, and the output raman light is transmitted to the beam expanding shaper (7) by the combined beam shaping unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055219A (en) * | 2022-05-13 | 2022-09-16 | 南方科技大学 | Preceding stage atom precooling system suitable for cold atom experiment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115055219A (en) * | 2022-05-13 | 2022-09-16 | 南方科技大学 | Preceding stage atom precooling system suitable for cold atom experiment |
| CN115055219B (en) * | 2022-05-13 | 2023-12-08 | 南方科技大学 | Pre-atomic pre-cooling system suitable for cold atomic experiment |
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