Abstract
The quest for oscillators of ever increasing accuracy and stability is one of the most important continuing developments in physics. Ultrastable clocks are required for tests of special and general relativity, searches for a possible temporal variation of fundamental constants, highest resolution spectroscopy, measurements of small forces and displacements. Worldwide efforts pursue the goal of building optical oscillators with instability at the 10−15 level at optical frequencies. One approach to this goal is to use cryogenic optical resonators (COREs), similar to the approach successfully used at microwave frequencies [1]. Here we describe the first results on the absolute stability of COREs.
© 1996 Optical Society of America
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