Abstract
Ultra-stable optical sources are required for a number of high-precision experiments, such as high-resolution spectroscopy and fundamental tests. We are developing a new generation of optical cavities, operated at cryogenic temperature, to be used as frequency references for ultra-stable lasers. Cryogenic operation is used to significantly reduce disturbances of the cavity length of thermal nature through a reduced thermal expansion coefficient and a higher thermal diffusivity [1]. High-stability locks of the lasers to the cavities and mechanically and thermally ultra-stable environments must be provided.
© 1996 IEEE
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