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

1.
B. J. Meers
Recycling in laser-interferometric gravitational-wave detectors
Phys. Rev. D 38, 2317 (1988)
2.
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)
3.
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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