Development of space-borne transportable high-finesse Fabry–Pérot cavity and its performance in ultra-stable laser

Abstract

A domestic space-borne transportable FP cavity is designed. The cavity length is 100 mm with the shape of a cube. Spacer is made of ultra-low expansion glass. This cavity is four-point mounting and heat insulated from external environmental fluctuation. To judge the performance of this cavity, an ultra-stable laser based on this cavity was constructed, the frequency noise of which is below 30Hz/√ Hz, which can fulfill the requirements of the Taiji-2 mission.