Optical fiber type CPT (Coherent Population Trapping) atomic clock physical system

A technology of physical systems and atomic clocks, applied in the direction of instruments using atomic clocks, etc., can solve problems affecting the compactness and stability of CPT atomic clocks, affecting the stability of CPT signals of atomic clocks, increasing the difficulty of installation and debugging optical paths, etc., to achieve easy miniaturization And engineering production, good structural symmetry, uniform magnetic field effect

Active Publication Date: 2016-12-07
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

This requirement increases the difficulty of installing and debugging the optical path, and affects the frequency stability of the atomic clock
[0009] 2. When the temperature of the atomic gas cell is constant, in the interaction between light and alkali metal atoms, in order to improve the signal-to-noise ratio of the CPT signal, it is necessary to increase the length of the interaction between light and atoms, because the collimated light is parallel To improve the signal-to-noise ratio of light, the only way to increase the length of the atomic gas chamber is to increase the size and power consumption of the atomic clock.
[0010] 3. The heater of the atomic gas chamber usually

Method used

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  • Optical fiber type CPT (Coherent Population Trapping) atomic clock physical system
  • Optical fiber type CPT (Coherent Population Trapping) atomic clock physical system
  • Optical fiber type CPT (Coherent Population Trapping) atomic clock physical system

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Embodiment Construction

[0028] Embodiments of the present invention are described in further detail below in conjunction with accompanying drawing:

[0029] figure 1 A schematic structural diagram of a fiber-type CPT atomic clock physical system provided by an embodiment of the present invention is shown. like figure 1 As shown, the present invention provides a kind of optical fiber type CPT atomic clock physical system, and this system comprises: pigtailed fiber VCSEL laser tube 1, optical fiber attenuator 2, optical fiber 1 / 4 wave plate 3, atomic gas cell assembly and pigtailed fiber photodetector 8. in,

[0030] A pigtailed VCSEL laser 1 is used to generate linearly polarized light.

[0031] The fiber attenuator 2 is connected with the pigtailed VCSEL laser 1 through an optical fiber, and is used for attenuating linearly polarized light.

[0032] The optical fiber 1 / 4 wave plate 3 is connected with the optical fiber attenuator 2 through an optical fiber, and is used for converting linearly po...

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Abstract

The invention provides an optical fiber type CPT (Coherent Population Trapping) atomic clock physical system. The system comprises a pigtail VCSEL, a fiber optic attenuator, an optical fiber one fourth wave plate, an atomic gas chamber component and a pigtail photoelectric detector; the fiber optic attenuator is connected with the pigtail VCSEL through optical fibers; the optical fiber one fourth wave plate is connected with the fiber optic attenuator through the optical fibers; the atomic gas chamber component is connected with the optical fiber one fourth wave plate through the optical fibers; the pigtail photoelectric detector is connected with the atomic gas chamber component through the optical fibers; the atomic gas chamber component comprises an atomic gas chamber, a C field coil, a metal thermostatic bath and a magnetic shielding strip. Compared with the prior art, the optical fiber type CPT atomic clock physical system provided by the invention has the advantages that coaxial installing in the prior art is not needed, the difficulty of installing and light path debugging is reduced, and the installation size is small; in addition, interaction of light and alkaline metal atoms in the optical fibers in a process of total-reflection in the optical fibers for multiple times can be realized by the atomic gas chamber, and a signal-to-noise ratio is improved, thereby improving the stability of outputting a CPT optical signal.

Description

technical field [0001] The invention relates to the technical field of miniaturized atomic frequency standards, in particular to an all-fiber type CPT atomic clock physical system. Background technique [0002] Optical fiber is an abbreviation for optical fiber, which is a fiber made of glass or plastic that can be used as a light transmission tool. The principle of transmission is total reflection of light. Kao Kung, former president of the Chinese University of Hong Kong, and George A. Hockham first proposed the idea that optical fibers could be used for communication transmission, for which Kao Kung won the 2009 Nobel Prize in Physics. [0003] Optical fiber technology generally consists of three parts: an optical signal transmitting end, an optical fiber for transmitting optical signals, and an optical signal receiving end. Fiber optic technology is represented in all three sections. Optical fiber sensing technology is a new technology that uses the optical fiber that...

Claims

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Application Information

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IPC IPC(8): G04F5/14
CPCG04F5/14
Inventor 卢向东王豪张笑楠王学锋王巍
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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