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Novel sensing and control schemes for a three-mirror coupled cavity

S H Huttner, B W Barr, M V Plissi, J R Taylor, B Sorazu and K A Strain

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We present two options for length sensing and control of a three-mirror coupled cavity. The control of the first cavity uses amplitude or single sideband modulation and phase modulation in combination with a beat-frequency demodulation scheme, whereas the control scheme for the second cavity incorporates phase modulation and single demodulation. The theoretical and experimental performance is discussed as well as the relevance to a research programme to develop interferometric techniques for application in future interferometric gravitational wave detectors.


PACS

42.60.Da Resonators, cavities, amplifiers, arrays, and rings

04.80.Nn Gravitational wave detectors and experiments

42.79.Pw Imaging detectors and sensors

07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing

42.60.Fc Modulation, tuning, and mode locking

42.60.Lh Efficiency, stability, gain, and other operational parameters

MSC

78A60 Lasers, masers, optical bistability, nonlinear optics (See also 81V80)

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Optics, quantum optics and lasers

Gravitation and cosmology

Dates

Issue 15 (7 August 2007)

Received 27 February 2007, in final form 29 May 2007

Published 17 July 2007



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