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          Institute: MPI für Gravitationsphysik     Collection: Laser Interferometry & Gravitational Wave Astronomy     Display Documents



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ID: 372631.0, MPI für Gravitationsphysik / Laser Interferometry & Gravitational Wave Astronomy
Double optical spring enhancement for gravitational wave detectors
Authors:Rehbein, Henning; Müller-Ebhardt, Helge; Somiya, Kentaro; Danilishin, Stefan L.; Schnabel, Roman; Danzmann, Karsten; Chen, Yanbei
Date of Publication (YYYY-MM-DD):2008-09-16
Title of Journal:Physical Review D
Volume:78
Issue / Number:6
Sequence Number of Article:062003
Review Status:not specified
Audience:Not Specified
Abstract / Description:Currently planned second-generation gravitational-wave laser interferometers such as Advanced LIGO exploit the extensively investigated signal-recycling technique. Candidate Advanced LIGO configurations are usually designed to have two resonances within the detection band, around which the sensitivity is enhanced: a stable optical resonance and an unstable optomechanical resonance—which is upshifted from the pendulum frequency due to the so-called optical-spring effect. As an alternative to a feedback control system, we propose an all-optical stabilization scheme, in which a second optical spring is employed, and the test mass is trapped by a stable ponderomotive potential well induced by two carrier light fields whose detunings have opposite signs. The double optical spring also brings additional flexibility in reshaping the noise spectral density and optimizing toward specific gravitational-wave sources. The presented scheme can be extended easily to a multi-optical-spring system that allows further optimization.
External Publication Status:published
Document Type:Article
Communicated by:Karsten Danzmann
Affiliations:MPI für Gravitationsphysik/Laser Interferometry & Gravitational Wave Astronomy
MPI für Gravitationsphysik/Teilinstitut Hannover
Identifiers:URL:http://arxiv.org/abs/0805.3096
ISSN:1089-4918
DOI:10.1103/PhysRevD.78.062003
URL:http://link.aps.org/abstract/PRD/v78/e062003
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PhRevD78-062003.pdf  [557,00 Kb] [Comment:Online Journal]  
 
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