Observing the optical modes of parametric instability.

  title={Observing the optical modes of parametric instability.},
  author={M. G. Schiworski and Vladimir Bossilkov and Carl Blair and Daniel D. Brown and Aaron W. Jones and David J. Ottaway and Chunnong Zhao},
  journal={Optics letters},
  volume={47 7},
Parametric instability (PI) is a phenomenon that results from resonant interactions between optical and acoustic modes of a laser cavity. This is problematic in gravitational wave interferometers where the high intracavity power and low mechanical loss mirror suspension systems create an environment where three-mode PI will occur without intervention. We demonstrate a technique for real-time imaging of the amplitude and phase of the optical modes of PI yielding, to the best of the authors… 

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