Scientific Results

Optical metrology for massive detectors of gravitational waves

Year: 2007

Authors: Marin F., De Rosa M., Conti L., Taffarello L., Cerdonio M.

Autors Affiliation: Dip. di Fisica and LENS, Universita` di Firenze, Via Sansone 1, 50019 Sesto Fiorentino (FI), Italy;
INFN, Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino (FI), Italy;
CNR – Istituto Nazionale di Ottica Applicata, Sezione di Napoli, Via Campi Flegrei 34, 80078 Pozzuoli (NA), Italy;
INFN, Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy;
Dip. di Fisica, Universita` di Padova, Via Marzolo 8, 35131 Padova, Italy

Abstract: The high level reached in the stability of laser sources and in the quality of optical components makes interferometric metrology appealing to those involved in the search for detection of gravitational waves (GWs). In this paper we present a readout for massive detectors of GWs, based on laser interferometry with high finesse Fabry-Perot cavities, and describe the frequency stability of the laser source. The achievable sensitivity at the quantum limit level inherent to this technique requires a careful design, in order to reduce other sources of extra noise. In particular, we focus on the local effects of thermal and radiation pressure fluctuations and present an optical configuration that can reduce these effects below the quantum limit level. (C) 2006 Published by Elsevier Ltd.

Journal/Review: OPTICS AND LASERS IN ENGINEERING

Volume: 45 (4)      Pages from: 471  to: 477

KeyWords: Detectors; Fabry-Perot interferometers; Gravity waves; Optical systems; Radiation effects; Thermal noise, Gravitational wave detectors; Laser interferometry; Optical configuration; Radiation pressure, Optical variables measurement
DOI: 10.1016/j.optlaseng.2005.03.015

Citations: 1
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