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Observation of enhanced optical spring damping in a macroscopic mechanical resonator and application for parametric instability control in advanced gravitational-wave detectors

Schediwy, S. W. and Zhao, C. and Ju, L. and Blair, D. G. and Willems, P. (2008) Observation of enhanced optical spring damping in a macroscopic mechanical resonator and application for parametric instability control in advanced gravitational-wave detectors. Physical Review A, 77 (1). Art. No. 013813. ISSN 1050-2947. http://resolver.caltech.edu/CaltechAUTHORS:SCHEpra08

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Abstract

We show that optical spring damping in an optomechanical resonator can be enhanced by injecting a phase delay in the laser frequency-locking servo to rotate the real and imaginary components of the optical spring constant. This enhances damping at the expense of optical rigidity. We demonstrate enhanced parametric damping which reduces the Q factor of a 0.1-kg-scale resonator from 1.3×10^5 to 6.5×10^3. By using this technique adequate optical spring damping can be obtained to damp parametric instability predicted for advanced laser interferometer gravitational-wave detectors.


Item Type:Article
Additional Information:© 2008 The American Physical Society. (Received 22 December 2006; published 16 January 2008) This is a project of the Australian Consortium for Gravitational Astronomy, supported by the Australian Research Council and the Western Australian Government OSI. We thank the LSC Gingin Advisory Committee for assistance and support. The LIGO Observatories were constructed by Caltech and MIT with NSF funding under Grant No. PHY-9210038. The LIGO Laboratory operates under cooperative agreement No. PHY-0107417. This paper has been assigned LIGO Document No. LIGO-P060061-00-Z.
Group:LIGO
Funders:
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Western Australian State governmentUNSPECIFIED
NSFPHY-9210038
NSFPHY-0107417
Subject Keywords:gravitational wave detectors; light interferometers; optical parametric devices; optical resonators
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO DocumentLIGO-P060061-00-Z
Issue or Number:1
Record Number:CaltechAUTHORS:SCHEpra08
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHEpra08
Alternative URL:http://dx.doi.org/10.1103/PhysRevA.77.013813
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9517
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:29 Jan 2008
Last Modified:03 Nov 2017 21:17

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