creators_name: Rehbein, Henning
creators_name: Müller-Ebhardt, Helge
creators_name: Somiya, Kentaro
creators_name: Danilishin, Stefan L.
creators_name: Schnabel, Roman
creators_name: Danzmann, Karsten
creators_name: Chen, Yanbei
creators_id: Rehbein-H
creators_id: Müller-Ebhardt-H
creators_id: Somiya-K
creators_id: Danilishin-S-L
creators_id: Schnabel-R
creators_id: Danzmann-K
creators_id: Chen-Y
type: article
datestamp: 2008-09-20 01:35:16
lastmod: 2008-09-20 01:35:16
metadata_visibility: show
title: Double optical spring enhancement for gravitational-wave detectors
ispublished: pub
subjects: cls
full_text_status: public
note: ©2008 The American Physical Society. 

(Received 20 May 2008; published 16 September 2008) 

We thank S. Waldman and K. Strain as well as T. Corbitt, N. Mavalvala and C. Wipf for very useful discussions. We thank R. Adhikari for suggesting the level of reduction of classical noise. Research of H.M.-E., K.S. and Y.C. is supported by the Alexander von Humboldt Foundation’s Sofja Kovalevskaja Program. Y.C. is also supported by NSF Grants No. PHY-0653653 and No. PHY-0601459, as well as the David and Barbara Groce startup fund at Caltech. Research of S.L.D. is also supported by the Alexander von Humboldt Foundation. Research of H.R. and R.S. is supported by the Deutsche Forschungsgemeinschaft through the SFB No. 407.
abstract: 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.
date: 2008-09-15
date_type: published
publication: Physical Review D
volume: 78
number: 6
publisher: American Physical Society
pagerange: Art. No. 062003
id_number: CaltechAUTHORS:REHprd08
refereed: TRUE
issn: 1550-7998
official_url: http://resolver.caltech.edu/CaltechAUTHORS:REHprd08
related_url_url: http://dx.doi.org/10.1103/PhysRevD.78.062003
related_url_url: http://link.aps.org/abstract/PRD/v78/e062003
related_url_type: doi
related_url_type: pub
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citation: Rehbein, Henning and Müller-Ebhardt, Helge and Somiya, Kentaro and Danilishin, Stefan L. and Schnabel, Roman and Danzmann, Karsten and Chen, Yanbei (2008) Double optical spring enhancement for gravitational-wave detectors. Physical Review D, 78 (6). Art. No. 062003. ISSN 1550-7998 http://resolver.caltech.edu/CaltechAUTHORS:REHprd08 <http://resolver.caltech.edu/CaltechAUTHORS:REHprd08>
document_url: http://authors.library.caltech.edu/11699/1/REHprd08.pdf