Optimal configurations of filter cavity in future gravitational-wave detectors

Details Optimal configurations of filter cavity in future gravitational-wave detectors Optimal configurations of filter cavity in future gravitational-wave detectors

2010-03-15

arxiv.org/abs/1003.2859v1

Physics

Instrumentation and Detectors

17 pages, 5 figures

Scientific paper

Sensitivity of future laser interferometric gravitational-wave detectors can be improved using squeezed light with frequency-dependent squeeze angle and/or amplitude, which can be created using additional so-called filter cavities. Here we compare performances of several variants of this scheme, proposed during last years, assuming the case of a single relatively short (tens of meters) filter cavity suitable for implementation already during the life cycle of the second generation detectors, like Advanced LIGO. Using numerical optimization, we show that the phase filtering scheme proposed by Kimble et al [Phys.Rev.D 65, 022002 (2001)] looks as the best candidate for this scenario.

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