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An integrated inert gas frequency reference device for laser frequency locking

A reference device and inert gas technology, applied in the direction of lasers, laser parts, electrical components, etc., can solve the problems of complex structure, difficult adjustment, fragility, etc., and achieve the effect of compact overall structure, maintaining vacuum, and convenient portability

Active Publication Date: 2020-07-10
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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  • Application Information

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Problems solved by technology

The present invention aims to solve the above-mentioned fragility problems mainly caused by glass materials, as well as the separation of the vacuum gas sample cell from the discharge system, complex structure and difficult adjustment, and proposes an integrated solution

Method used

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  • An integrated inert gas frequency reference device for laser frequency locking
  • An integrated inert gas frequency reference device for laser frequency locking
  • An integrated inert gas frequency reference device for laser frequency locking

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Embodiment Construction

[0019] figure 1 It is a schematic diagram of the vacuum flange structure of the inert gas frequency reference device. Vacuum flange 1 adopts detachable all-metal sealing method and figure 2 The vacuum chamber shown makes the vacuum connection. The radio frequency input electrode 2, the vacuum pumping and gas filling pipes 4 and 7, the vacuum electrodes 5 and 6 are welded on the flange 1 by argon arc welding, and the vacuum inner surface is welded to ensure the vacuum performance; the laser observation window 3 is brazed On the flange, it can be coated to improve the laser transmittance according to the need. Only the structural schematic diagram of the flange is drawn in the figure.

[0020] Such as figure 2 As shown, the vacuum chamber of the inert gas frequency reference device is composed of an interface flange 8, a vacuum chamber pipe 9, and a vacuum chamber bottom plate 11 to form an overall structure by means of argon arc welding. The laser window 10 and figure 1 ...

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Abstract

The invention adopts a radio frequency gas discharge manner and provides an integrated inert-gas frequency standard device for laser frequency locking. Integrated design of a sample gas container and a radio frequency discharge system is adopted, a structure of a vacuum chamber is fully used, and the system miniaturization and integration are achieved. According to the scheme, the device comprises an outer-layer high vacuum chamber and an inner-layer radio frequency gas discharge assembly, and glass or a ceramic tube is adopted as the separation part to achieve electrical insulation; an inner-layer radio frequency discharge system is located and fixed by sleeving the glass or the ceramic tube with a spiral discharge coil; a signal input end and a grounding end of the spiral coil are connected to a vacuum flange; an optical window is fixed to the flange surface in a welded manner; the system vacuum degree is improved and the service life is prolonged by means of an adsorption pump; a detachable interface is adopted, and other samples can be injected to be used as the frequency locking standard of various lasers. With the adoption of the design of a stainless steel vacuum chamber, the problem of fragility of a sample reference pond made of glass and the relatively high permeability of quartz crystals to helium and the like can be solved.

Description

technical field [0001] The invention relates to a metastable inert gas frequency reference device integrated with a gas sample container and a radio frequency discharge system, which provides an atomic frequency reference for laser frequency locking. Background technique [0002] The development of ultra-narrow linewidth and ultra-stable wavelength lasers is a hot field of laser spectroscopy research, which can be applied to ultra-precision spectral measurement, time-frequency standards and other fields. The output wavelength of the laser must be locked on a certain frequency reference standard to achieve long-term stability and reproducibility. It is a good choice to use the frequency of atomic energy level transition as the reference standard for laser frequency locking. The atomic frequencies of alkali metal atoms (such as sodium, rubidium, cesium) and alkaline earth metal atoms (calcium, strontium, barium) are in the visible and infrared wavelength ranges, which can dire...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/13
CPCH01S3/1304
Inventor 冯高平文明王明东王广宇
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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