An optical fiber alkali metal gas chamber
An alkali metal gas cell and optical fiber technology, which is applied in the field of quantum quantum sensing and quantum precision measurement, can solve the problems such as being difficult to integrate into the magnetometer system, the solution of the optical fiber alkali metal gas cell is not mature, and the high insertion loss, etc. Solve the insertion loss, the filling method is flexible, and the effect of reducing the insertion loss
Inactive Publication Date: 2020-06-16
BEIHANG UNIV
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Problems solved by technology
[0003] At present, the important factor limiting its further development is that the scheme of optical fiber alkali metal gas chamber is not yet mature.
There are two existing schemes, one is to use the principle of light induction to release Rb atoms into the fiber core, but this scheme will produce higher insertion loss
Another solution is to use single-mode fiber-capillary-multimode fiber fusion splicing scheme, but it is not easy to integrate into the magnetometer system due to the use of multimode fiber
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0027] Such as figure 1 As shown, the optical fiber alkali metal air chamber of the present invention includes a left end internally threaded sealing cap 1, a left end externally threaded sealing tube 2, a left end polarization maintaining optical fiber 3, a left end air-core photonic crystal optical fiber 4, a left end optical fiber ceramic ferrule 5, and a ceramic sleeve 6. Internal thread sealing cap 7 at the right end, external thread sealing tube 8 at the right end, polarization maintaining optical fiber 9 at the right end, air core photonic crystal optical fiber 10 at the right end, optical fiber ceramic ferrule 11 at the right end, and T-shaped glass tube 12.
[0028] The polarization-maintaining optical fiber 3 at the left end and the polarization-maintaining optical fiber 9 at the right end should be selected with larger birefringence ...
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The invention discloses an optical fiber alkali metal air chamber. The air chamber performs a structural design from points of integration, miniaturization and convenience in integration with opticalfiber devices. The air chamber is used for sealing alkali metal vapors through a T-shaped glass pipe and fixing optical fibers in the T-shaped pipe through a ceramic ferrule alignment structure, and ensuring that lights can pass through smoothly and can contact with the alkali metal vapors, wherein the two ends of the T-shaped pipe are sealed by a threaded sealing structure for sealing of the T-shaped pipe and the optical fiber. The structure conveniently connects the air chamber with various optical fiber devices, and provides the possibility for a full-fiber miniaturized atomic magnetometer.
Description
technical field [0001] The invention relates to the fields of sub-quantum sensing and quantum precision measurement. In particular, an optical fiber alkali metal gas chamber that can be integrated with an optical fiber system. Background technique [0002] At present, sensors based on atomic spin effects have ultra-high sensitivity characteristics, and have good development prospects in basic physics research, biomedicine, geomagnetic navigation and other fields. At present, the miniaturization of atomic magnetometers is an urgent need for magnetoencephalometry and magnetocardiometric applications. Therefore, fiber optic atomic magnetometer has become a research hotspot in the field of atomic magnetometer. [0003] At present, an important factor limiting its further development is that the scheme of optical fiber alkali metal gas chamber is not yet mature. There are two existing schemes, one is to use the principle of light induction to release Rb atoms into the fiber co...
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IPC IPC(8): G01R33/032
CPCG01R33/032
Inventor 房建成刘学静李阳丁铭张景鑫
Owner BEIHANG UNIV