Signal Recycling and Resonant Sideband Extraction

Signal Recycling and Resonant Sideband Extraction

Signal recycling

Signal recycling improves the sensitivity of an interferometer by adding a partially reflective mirror at the output port. This improves of the fringe-contrast of the whole interferometer and allows shaping the frequency response of the instrument – tuning it for certain gravitational-wave signals.

GEO600 researched different signal-recycling configurations in detail, which resulted in a considerable sensitivity improvement at high frequencies.

Resonant Sideband Extraction

An interferometer with resonant sideband extraction can be manipulated in such a way that its optical response to effects from gravitational waves can be optimized frequency dependent – independently of other parameters of the interferometer.

Relevant publications

B. J. Meers
Recycling in laser-interferometric gravitational-wave detectors
Phys. Rev. D 38, 2317 (1988)
J.Mizuno, K.A.Strain, P.G.Nelson, J.M.Chen, R.Schilling, A.Rüdiger, W.Winkler, K.Danzmann
Resonant sideband extraction: a new configuration for interferometric gravitational wave detectors
Physics Letters A, Volume 175, Issue 5, (1993)
G.Heinzel, J.Mizuno, R.Schilling, W.Winkler, A.Rüdiger, K.Danzmann
An experimental demonstration of resonant sideband extraction for laser-interferometric gravitational wave detectors
Physics Letters A, Volume 217, Issue 6 (1996)
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