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

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

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jphcs.228a2022h&link_type=abstract

Journal of Physics: Conference Series, Volume 228, Issue 1, pp. 012022 (2010).

Physics

1

Scientific paper

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.

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