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Observation of optical torsional stiffness in a high optical power cavity

Fan, Yaohui; Merrill, Lucienne; Zhao, Chunnong; Ju, Li; Blair, David; Slagmolen, Bram; Hosken, David; Brooks, Aidan; Veitch, Peter; Mudge, Damien; Munch, Jesper


We have observed negative optical torsional rigidity in an 80 m suspended high optical power cavity that would induce the Sidles–Sigg instability as a result of sufficient circulating power. The magnitude of the negative optical spring constant per unit power is a few μN m/W as the result of the optical torsional stiffness in the yaw mode of a suspended mirror Fabry–Pérot cavity. It has been observed to depend on the g-factor of the cavity which is in agreement with the Sidles–Sigg theory.

CollectionsANU Research Publications
Date published: 2009-02-24
Type: Journal article
Source: Applied Physics Letters
DOI: 10.1063/1.3088850


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