Vol. 12 (2009) > lrr-2009-5

doi: 10.12942/lrr-2009-5
Living Rev. Relativity 12 (2009), 5

On Special Optical Modes and Thermal Issues in Advanced Gravitational Wave Interferometric Detectors

1 Observatoire de la Côte d’Azur (ARTEMIS), Université de Nice-Sophia Antipolis, 06304 Nice, France

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Article Abstract

The sensitivity of present ground-based gravitational wave antennas is too low to detect many events per year. It has, therefore, been planned for years to build advanced detectors allowing actual astrophysical observations and investigations. In such advanced detectors, one major issue is to increase the laser power in order to reduce shot noise. However, this is useless if the thermal noise remains at the current level in the 100 Hz spectral region, where mirrors are the main contributors. Moreover, increasing the laser power gives rise to various spurious thermal effects in the same mirrors. The main goal of the present study is to discuss these issues versus the transverse structure of the readout beam, in order to allow comparison. A number of theoretical studies and experiments have been carried out, regarding thermal noise and thermal effects. We do not discuss experimental problems, but rather focus on some theoretical results in this context about arbitrary order Laguerre–Gauss beams, and other “exotic” beams.

Keywords: Optics, Gravitational wave detectors, Gravitational radiation, Interferometry

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Since a Living Reviews in Relativity article may evolve over time, please cite the access <date>, which uniquely identifies the version of the article you are referring to:

Jean-Yves Vinet,
"On Special Optical Modes and Thermal Issues in Advanced Gravitational Wave Interferometric Detectors",
Living Rev. Relativity 12,  (2009),  5. URL (cited on <date>):
http://www.livingreviews.org/lrr-2009-5

Article History

ORIGINAL http://www.livingreviews.org/lrr-2009-5
Title On Special Optical Modes and Thermal Issues in Advanced Gravitational Wave Interferometric Detectors
Author Jean-Yves Vinet
Date accepted 14 May 2009, published 17 July 2009
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