Double optical spring enhancement for gravitational-wave detectors

Journal Article · Mon Sep 15 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.062003· OSTI ID:21250792

Rehbein, Henning; Mueller-Ebhardt, Helge; Schnabel, Roman; Danzmann, Karsten ^[1]; Somiya, Kentaro; Yanbei, Chen ^[2]; Danilishin, Stefan L ^[1]

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1. Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut), Institut fuer Gravitationsphysik, Leibniz Universitaet Hannover, Callinstrasse 38, 30167 Hannover (Germany)
2. California Institute of Techology, Theoretical Astrophysics 130-33, Pasadena, California 91125 (United States)

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.

• OSTI ID: 21250792
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
79 ASTRONOMY AND ASTROPHYSICS
CONFIGURATION
CONTROL SYSTEMS
DETECTION
FEEDBACK
GRAVITATIONAL WAVE DETECTORS
GRAVITATIONAL WAVES
INTERFEROMETERS
LASER RADIATION
MASS
NOISE
OPTIMIZATION
PONDEROMOTIVE FORCE
POTENTIALS
RESONANCE
SENSITIVITY
SPECTRAL DENSITY
STABILIZATION
TRAPPING