Observation of optical torsional stiffness in a high optical power cavity

Yaohui Fan, L.A. Merrill, Chunnong Zhao, Li Ju, David Blair, B. Slagmolen, D. Hosken, A. Brooks, P. Veitch, D. Mudge, J. Munch

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    7 Citations (Scopus)


    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.
    Original languageEnglish
    Pages (from-to)Article number 081105, 3pp
    JournalApplied Physics Letters
    Issue number8
    Publication statusPublished - 2009

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