Squeezing in the audio gravitational wave detection band

Details Squeezing in the audio gravitational wave detection band Squeezing in the audio gravitational wave detection band

2004-05-24

arxiv.org/abs/quant-ph/0405137v2

Phys.Rev.Lett. 93 (2004) 161105

Physics

Quantum Physics

5 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.93.161105

We demonstrate the generation of broad-band continuous-wave optical squeezing down to 200Hz using a below threshold optical parametric oscillator (OPO). The squeezed state phase was controlled using a noise locking technique. We show that low frequency noise sources, such as seed noise, pump noise and detuning fluctuations, present in optical parametric amplifiers have negligible effect on squeezing produced by a below threshold OPO. This low frequency squeezing is ideal for improving the sensitivity of audio frequency measuring devices such as gravitational wave detectors.

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