Conveyable super-stable optical reference cavity for space application

Abstract

The invention discloses a conveyable super-stable optical reference cavity for space application. The conveyable super-stable optical reference cavity comprises a globoid and a ring for fixing the globoid. The globoid is provided with a light through hole passing the center of the globoid, optical lenses are arranged at the two ends of the light through hole and made by utilizing an ultralow expanding material as a substrate material, and the globoid is further provided with a vacuum vent hole and a fixing hole. The ultralow expanding material is ULE, single crystal silicon, ceramic, microcrystalline glass or fused quartz. The conveyable super-stable optical reference cavity for space application is designed in a mode of combining a sphere and the ring. As shown in the background technology, the conveyable super-stable optical reference cavity for space application can well protect sphere space structural mechanics integrity, not only can achieve good vibration sensitivity in the three-dimensional direction, but also can meet the harsh conditions of space vibration impact and is simple to assemble and adjust on the whole.

Description

technical field [0001] The invention belongs to the field of ultra-stable optical reference cavities, and relates to an ultra-stable optical reference cavity structure, in particular to a space application and transportable ultra-stable optical reference cavity. Background technique [0002] With the development of aerospace technology, the United States, the European Union, Japan and other developed countries and organizations in the world are scrambling to carry out optical clock research programs in the field of space, in order to strive for the commanding heights of time and frequency, and to achieve higher precision applications in navigation, satellites, and national defense. As an extremely critical component in the optical clock research program, the ultra-stable optical reference cavity has played an irreplaceable role. Some key indicators in the optical clock research program are closely related to the stability of the effective cavity length of the ultra-stable op...

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Problems solved by technology

However, there are two defects in this ultra-stable optical reference cavity: first, when supporting the spherical cavity, additional pressure to squeeze the sphere is required, which not only destroys the perfect symmetry of the original structural mechanics of the sphere, but also makes it difficult to control the intensity of extrusion. Complex assembly; second, the complex vibration environment and harsh conditions in the three-dimensional direction of space, the ultra-stable optical reference cavity adopts a two-point one-dimensional direction support method, which is difficult to overcome the complex vibration environment in space

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