Ultra-low phase noise squeezed vacuum source for gravitational wave detectors

Oelker, E., Mansell, G., Tse, M., Miller, J., Matichard, F., Barsotti, L., Fritschel, P., McClelland, D. E., Evans, M. and Mavalvala, N. (2016) Ultra-low phase noise squeezed vacuum source for gravitational wave detectors. Optica, 3(7), pp. 682-685. (doi: 10.1364/OPTICA.3.000682)

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Abstract

Squeezed states of light are a valuable resource for reducing quantum noise in precision measurements. Injection of squeezed vacuum states has emerged as an important technique for reducing quantum shot noise, which is a fundamental limitation to the sensitivity of interferometric gravitational wave detectors. Realizing the most benefit from squeezed-state injection requires lowering optical losses and also minimizing squeezed quadrature fluctuations—or phase noise—to ensure that the large noise in the anti-squeezed quadrature does not contaminate the measurement quadrature. Here, we present an audio band squeezed vacuum source with 1.3+0.7−0.5 mrad of phase noise. This is a nearly tenfold improvement over previously reported measurements, improving prospects for squeezing enhancements in current and future gravitational wave detectors.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Oelker, Dr Eric
Authors: Oelker, E., Mansell, G., Tse, M., Miller, J., Matichard, F., Barsotti, L., Fritschel, P., McClelland, D. E., Evans, M., and Mavalvala, N.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optica
Publisher:Optical Society of America
ISSN:2334-2536
ISSN (Online):2334-2536
Published Online:23 June 2016
Copyright Holders:Copyright © 2016 Optical Society of America
First Published:First published in Optica 3(7): 682-685
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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