Lateral input-optic displacement in a diffractive Fabry-Perot cavity

Hallam, J., Chelkowski, S., Freise, A., Barr, B.W. , Hild, S. , Strain, K.A. , Burmeister, O. and Schnabel, R. (2010) Lateral input-optic displacement in a diffractive Fabry-Perot cavity. Journal of Physics: Conference Series, 228(1), 012022. (doi: 10.1088/1742-6596/228/1/012022)

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All-reflective configurations have been suggested for future laser-interferometric gravitational wave detectors. Diffraction gratings would be required as core elements of any such design. In this paper, coupling of lateral grating displacement to the output ports of a diffractive Fabry-Perot cavity was derived using a steady-state technique. The signal to noise ratio versus a potential gravitational wave signal was compared for each cavity output port. For a cavity featuring parameters similar to the planned Advanced Virgo instrument, we found the forward-reflected port offers the highest SNR at low frequencies. Furthermore, the lateral isolation suspension requirements were relaxed by a factor of twenty at a frequency of 10Hz versus the transmitted port.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Hild, Professor Stefan and Barr, Dr Bryan and Strain, Professor Kenneth
Authors: Hallam, J., Chelkowski, S., Freise, A., Barr, B.W., Hild, S., Strain, K.A., Burmeister, O., and Schnabel, R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Physics: Conference Series
Publisher:IOP Publishing
ISSN (Online):1742-6596

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