An ultra-low stress ultra-high vacuum optical reference cavity

CN122018105BActive Publication Date: 2026-06-09TIANJIN JIZHI HANGYU TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN JIZHI HANGYU TECH CO LTD
Filing Date
2026-04-14
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In traditional optical reference cavities, mirrors in ultra-stable cavity systems are prone to contamination, leading to performance degradation.

Method used

An ultra-low stress ultra-high vacuum optical reference cavity was designed, comprising a reference cavity substrate, a mirror, a getter assembly, and a vacuum sealing assembly. By setting a resonant channel and flexibly connecting the getter assembly and the vacuum sealing assembly on the reference cavity substrate, the optical reference cavity achieves self-sustaining vacuum maintenance and stress isolation.

Benefits of technology

It achieves a long-term ultra-high vacuum environment for the optical reference cavity, ensuring that the mirrors are not contaminated by external factors and maintain high precision for decades, thus avoiding the impact of assembly, welding, and thermal stress on the cavity.

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Abstract

This invention provides an ultra-low stress, ultra-high vacuum optical reference cavity, relating to the field of ultra-stable cavity systems. It includes a reference cavity substrate, a mirror, a getter assembly, and a vacuum sealing assembly. The reference cavity substrate contains a resonant channel, which includes a first resonant channel and a second resonant channel arranged in a cross configuration. Both the first and second resonant channels penetrate the reference cavity substrate. A mirror is positioned at each of the two ends of the first resonant channel. The getter assembly is located at the first end of the second resonant channel, and the vacuum sealing assembly is located at the second end of the second resonant channel. The getter assembly adsorbs gas that permeates into the resonant channel, maintaining the ultra-high vacuum level within the resonant channel. The vacuum sealing assembly evacuates the resonant channel. This makes the interior of the optical reference cavity a sealed space, capable of achieving a long-term ultra-high vacuum level without requiring an external vacuum system environment, and the mirror is no longer susceptible to external environmental contamination.
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