阅读说明：本技术 一种物质波源的实用化装置 (Practical device of matter wave source ) 是由 李嘉华 桑建芝 刘院省 王学锋 于 2020-06-17 设计创作，主要内容包括：一种物质波源的实用化装置,属于原子干涉技术领域,该装置采用无源吸气剂泵解决真空系统的SWAP问题；使用异型反射镜和单光纤同时传输多频段激光有效降低光学系统的复杂性；并结合多层PCB板印制磁场线圈解决磁场系统SWAP问题,以期获得简便的原子干涉惯性器件用物质波源的物理系统。本发明采用内置异型反射镜,外包裹PCB线圈的真空腔体,与缠绕多组线圈框架,多路激光输出调节架的现有物质波源装置相比,能实现原子干涉惯性器件在SWAP-C上突破,更适用于较小空间环境下工作；采用时序控制的多重激光频率按照原子干涉过程分时同步或分步发射,进一步简化敏感头装置,更实用、稳定。(A practical device of a matter wave source belongs to the technical field of atomic interference, and the device adopts a passive getter pump to solve the SWAP problem of a vacuum system; the complexity of an optical system is effectively reduced by using the special-shaped reflector and the single optical fiber to simultaneously transmit multi-band laser; and the problem of SWAP of a magnetic field system is solved by combining a multilayer PCB printed magnetic field coil, so that a simple physical system of a substance wave source for an atomic interference inertia device is obtained. Compared with the existing substance wave source device which is wound with a plurality of groups of coil frames and a multi-path laser output adjusting frame, the invention can realize the breakthrough of an atomic interference inertia device on SWAP-C and is more suitable for working in a smaller space environment; the multiple laser frequency controlled by the time sequence is transmitted synchronously or step by step according to the atomic interference process, so that the sensitive head device is further simplified, and the method is more practical and stable.)

1. A practical device of a material wave source is characterized by comprising a vacuum cavity with a built-in special-shaped reflector, a magnetic field coil wrapped on the side face of the vacuum cavity, a quarter-wave plate, a Glan prism and an optical fiber amplification collimation sleeve which are arranged at one end of the vacuum cavity, a detector for reflecting detection signals through the Glan prism, and an alkali metal source arranged at the other end of the vacuum cavity and used for providing gas chamber atoms; the magnetic field coil provides a time sequence magnetic field under external control;

the central axes of the special-shaped reflector, the quarter-wave plate, the Glan prism and the optical fiber amplification collimation sleeve are overlapped, external laser vertically enters the special-shaped reflector after sequentially passing through the optical fiber amplification collimation sleeve, the Glan prism and the quarter-wave plate, and atom capture is completed under a time sequence magnetic field; the detector is used for collecting the reflected detection signal to finish the inertia measurement.

2. The practical device of a material wave source as claimed in claim 1, further comprising a molecular pump and a compound pump, wherein the vacuum chamber is provided with a three-claw tee at the end face where the alkali metal source is installed, and the three-claw tee is respectively used for connecting the molecular pump, the alkali metal source and the compound pump.

3. The device as claimed in claim 1, wherein the magnetic field coil is a multi-layer Printed Circuit Board (PCB) magnetic field coil.

4. The device of claim 1, wherein the magnetic field coils comprise a magneto-optical trap coil and three sets of geomagnetic coils.

5. The device as claimed in any one of claims 1 to 4, wherein the vacuum chamber is formed by fixing the special-shaped reflector in the vacuum chamber by means of L-shaped support and top ring screwing.

6. The device for practical use of a substance wave source as set forth in any one of claims 1 to 4, wherein the irregular reflector is a hollow reflector, the external laser beam is vertically incident and then reflected from four sides to form a beam overlapping region, and the center of the overlapping region overlaps with the center of the field coil.

7. The device for practical use of a substance wave source as set forth in any one of claims 1 to 4, wherein said irregular mirrors are fixed by using a non-magnetic titanium nail.

8. The device for practical use of a substance wave source as claimed in any one of claims 1 to 4, wherein the alkali metal source is a rubidium source.

Technical Field

The invention relates to a practical device of a substance wave source, belonging to the technical field of atomic interference.

Background

From the development trend of the inertial device, the atomic interference inertial device is gradually becoming a key technology for realizing autonomous navigation with its advantage of ultra-high precision. At present, an atomic interference gyroscope with high zero offset stability and an atomic interference accelerometer with high sensitivity can be realized in a static environment of a laboratory, and the precision of INS/GNSS combined navigation is reached or even exceeded. However, the problems of large volume, heavy weight, high power consumption and high cost, i.e., high SWAP-C, faced by the atomic interference inertial device, compared with the conventional inertial device, seriously hinder the practical implementation of the atomic interference inertial device. The main research units of atomic interference devices such as NIST have started to gradually turn the center of gravity of the research to a low SWAP-C practical atomic interference inertial device capable of adapting to the future autonomous navigation and providing the requirement of adapting to the complex environment.

Compared with the existing atom interference device with the length of about 1m in the domestic laboratory, the atom interference inertial device has great descending space and practical potential on SWAP-C. Key issues impeding the practical implementation of atomic interference inertial devices are mainly limited by the complexity of the optical system, the SWAP problem of the magnetic field system, and the SWAP problem of the vacuum system.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and a practical device of a substance wave source is provided, and the device adopts a passive getter pump to solve the SWAP problem of a vacuum system; the complexity of an optical system is effectively reduced by using the special-shaped reflector and the single optical fiber to simultaneously transmit multi-band laser; and the problem of SWAP of a magnetic field system is solved by combining a multilayer PCB printed magnetic field coil, so that a simple physical system of a substance wave source for an atomic interference inertia device is obtained.

The purpose of the invention is realized by the following technical scheme:

a practical device of a material wave source comprises a vacuum cavity internally provided with a special-shaped reflector, a magnetic field coil wrapped on the side surface of the vacuum cavity, a quarter-wave plate, a Glan prism and an optical fiber amplification collimation sleeve which are arranged at one end of the vacuum cavity, a detector for reflecting a detection signal through the Glan prism, and an alkali metal source arranged at the other end of the vacuum cavity and used for providing gas chamber atoms; the magnetic field coil provides a time sequence magnetic field under external control;

the central axes of the special-shaped reflector, the quarter-wave plate, the Glan prism and the optical fiber amplification collimation sleeve are overlapped, external laser vertically enters the special-shaped reflector after sequentially passing through the optical fiber amplification collimation sleeve, the Glan prism and the quarter-wave plate, and atom capture is completed under a time sequence magnetic field; the detector is used for collecting the reflected detection signal to finish the inertia measurement.

The practical device of the substance wave source preferably further comprises a molecular pump and a compound pump, wherein the vacuum cavity is provided with a three-claw tee joint at the end face for mounting the alkali metal source and is respectively used for connecting the molecular pump, the alkali metal source and the compound pump.

In the device for putting the substance wave source into practical use, the magnetic field coil is preferably a multilayer PCB printed magnetic field coil.

Preferably, the device for putting the material wave source into practical use includes a magneto-optical trap coil and three sets of geomagnetic coils.

Preferably, the vacuum cavity is fixed with the special-shaped reflector in the vacuum cavity by adopting an L-shaped support of the shell and an upward spinning top ring mode.

In the device for putting the substance wave source into practical use, it is preferable that the irregular reflecting mirror is a hollow reflecting mirror, the external laser beam is vertically incident and then reflected from four sides to form a beam overlapping region, and a center of the beam overlapping region overlaps a center of the field coil.

In the device for practical use of the material wave source, preferably, the non-magnetic titanium nails are used for fixing the irregular reflector.

In the practical use device of the substance wave source, the alkali metal source is preferably a rubidium source.

Compared with the prior art, the invention has the following beneficial effects:

(1) compared with the existing substance wave source device which is wound with a plurality of groups of coil frames and a multi-path laser output adjusting frame, the invention can realize the breakthrough of an atomic interference inertia device on SWAP-C and is more suitable for working in a smaller space environment;

(2) according to the invention, multiple laser frequencies controlled by a time sequence are adopted to be transmitted synchronously in a time-sharing manner or step by step according to an atomic interference process, so that a sensitive head device is further simplified, and the method is more practical and stable;

(3) the envelope size of the invention is 12cm by 20cm by 30cm, thus effectively improving the environmental adaptability;

(4) the single-beam optical atom capturing device is adopted, so that fewer optical devices are used, the stability of an optical system is improved, the vibration noise is reduced, and the data output stability is improved.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention.

Reference numerals: the device comprises a vacuum cavity 1, a special-shaped reflector 2, a magnetic field coil 3, a quarter wave plate 4, a Glan prism 5, a detector 6, an optical fiber amplification collimation sleeve 7 and a tee joint 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A practical device of a material wave source comprises a vacuum cavity internally provided with a special-shaped reflector, a magnetic field coil wrapped on the side surface of the vacuum cavity, a quarter-wave plate, a Glan prism and an optical fiber amplification collimation sleeve which are arranged at one end of the vacuum cavity, a detector for reflecting a detection signal through the Glan prism, and an alkali metal source arranged at the other end of the vacuum cavity and used for providing gas chamber atoms; the magnetic field coil provides a time sequence magnetic field under external control; also comprises a molecular pump and a compound pump.

The central axes of the special-shaped reflector, the quarter-wave plate, the Glan prism and the optical fiber amplification collimation sleeve are overlapped, external laser vertically enters the special-shaped reflector after sequentially passing through the optical fiber amplification collimation sleeve, the Glan prism and the quarter-wave plate, and atom capture is completed under a time sequence magnetic field; the detector is used for collecting the reflected detection signal to finish the inertia measurement. The vacuum cavity is provided with a three-claw tee joint on the end face for mounting the alkali metal source, and the three-claw tee joint is respectively used for connecting the molecular pump, the alkali metal source and the composite pump.

The magnetic field coil is a multilayer PCB printed magnetic field coil and comprises a magneto-optical trap coil and three groups of geomagnetic coils. The vacuum cavity adopts a shell L-shaped support and top rotating pressing ring mode to fix the special-shaped reflector in the vacuum cavity. The special-shaped reflector is a hollow reflector, external laser is vertically incident and then reflected on four sides to form a light beam overlapping area, and the center of the overlapping area is overlapped with the center of the magnetic field coil. The fixing of the special-shaped reflector uses non-magnetic titanium nails. The alkali metal source is a rubidium source.