Observation of three-mode parametric interactions in long optical cavities

Chunnong Zhao, Li Ju, Y. Fan, Slawomir Gras, B.J.J. Slagmolen, X.M. Miao, Pablo Barriga, David Blair, D.J. Hosken, A.F. Brooks, P.J. Veitch, D. Mudge, J. Munch

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    Abstract

    We report the observation of three-mode optoacoustic parametric interactions of the type predicted to cause parametric instabilities in a 77-m-long, high-optical-power cavity that uses suspended sapphire mirrors. Resonant interaction occurs between two distinct optical modes and an acoustic mode of one mirror when the difference in frequency between the two optical cavity modes is close to the frequency of the acoustic mode. Experimental results validate the theory of parametric instability in high-power optical cavities, and demonstrate tunable parametric gain similar to 10(-2) and more than 20 dB amplification of a high-order optical mode power generated by an applied acoustic signal.
    Original languageEnglish
    Pages (from-to)online - approx 5-20pp
    JournalPhysical Review A
    Volume78
    Issue number2
    DOIs
    Publication statusPublished - 2008

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