All-glass optical atom cavity with vacuum degree higher than 1*10<-8> Pa and preparation method

Abstract

The invention discloses an all-glass optical atom cavity with the vacuum degree higher than 1*10<-8> Pa and a preparation method. The all-glass optical atom cavity comprises an optical vacuum cavity body, a guide pipe, an optical window sheet, a vacuum adapter and a pressing sheet. The optical vacuum cavity body is a polyhedron with a plane in any shape, an optical window is arranged on the planeof the polyhedron, and holes, extending into the polyhedron, of the optical window form the same inner cavity. The optical window sheet is fixed on the optical window. One end of the guide pipe is fixedly connected with the optical vacuum cavity body, the other end of the guide pipe is connected with the vacuum adapter through the pressing sheet, and the other end of the vacuum adapter is connected with a vacuum pump. An optical cement vacuum bonding process is adopted, the implementation process of the process is always carried out in a vacuum environment, and gas on the surface of a bonded object is favorably exhausted by virtue of a proper temperature and negative pressure environment, so that molecules between objects are better combined. According to the invention, a structure that nometal substance exists in the working area of the vacuum cavity is realized, so that the working area is not interfered by the magnetic field of the stainless steel vacuum cavity.

Description

technical field [0001] The invention relates to the field of optical experimental equipment, in particular to an ultra-high vacuum, quartz glass, integral optical chamber and its preparation. The vacuum degree is better than 1×10 -8 An all-glass optical atomic cavity of Pa and its preparation method. Background technique [0002] Ultra-high vacuum provides the basis for various surface science research, material growth and device applications; it is also the experimental basis for various cold atom and molecular research platforms. Specifically, it involves various fields such as semiconductors, condensed matter physics, chemistry, new materials research and biological sciences. [0003] Generally speaking, an ultra-high vacuum system is composed of vacuum pumps, vacuum gauges, vacuum chambers and other components. The core is to realize the ultra-high vacuum environment, that is, the vacuum degree is better than 10 -8 Pa. In an ultra-high vacuum system, factors such as...

AI Technical Summary

Problems solved by technology

Disadvantages The surface quality of the optical window and the film layer will be damaged

[0009] Limited by the current cavity manufacturing method and coating process technology, if the inner surface cannot be coated, the additional optical absorption will be generated on the medium surface of the optical window, which will not only reduce the detection efficiency, but also make it difficult to realize the optical resonant cavity structure that passes through the window glass.

Due to the extra stray light generated by the inner surface that cannot be coated, it may also cause additional interference fringes on the working optical path and increase the detection noise

[0010] If the coating on the inner and outer surfaces of the optical window is given priority, and then the glass cavity is combined by chemical glue bonding or firing, it will not be able to meet the ultra-high vacuum environment and the cleanliness requirements in the cavity.

Bonding with chemical glue will accumulate over time, and the colloid itself will volatilize and outgas, which will affect the internal vacuum degree

Using the firing method, the glass firing temperature exceeds the tolerance range of the film system, which will lead to the destruction of the film system

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