Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Fabry-Perot temperature dependence and surface-mounted optical cavities



Richard W. Fox


Factors that contribute to the resonance temperature dependence of low-expansion optical cavities are discussed, including deformation at the cavity ends due to different coefficients of thermal expansion (CTE) of the spacer, optically-contacted mirror substrate and coating. A model of temperature dependence is presented that incorporates finite-element-analysis of the cavity ends. Measurements of frequency versus temperature of a cavity mode are used along with the model to measure a spacer s CTE profile. The measured profile correlates very well with a separate experiment utilizing a temporary surface-mounted Fabry-Perot cavity fabricated on the outside of the spacer with hydroxy-catalysis bonding. Such temporary cavities may be useful for accurately measuring the CTE of potential spacer -glass pieces, enabling cavity designs with near zero temperature dependence at specified temperatures.
Proceedings Title
Proc. SPIE Conference
Conference Dates
June 2-4, 2008
Conference Location
Montreal, CA
Conference Title
SPIE Proceedings of Photonics North 2008


Fabry-Perot, resonator, hydroxy-catalysis bonding


Fox, R. (2008), Fabry-Perot temperature dependence and surface-mounted optical cavities, Proc. SPIE Conference , Montreal, CA, [online], (Accessed April 19, 2024)
Created June 2, 2008, Updated February 17, 2017