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In situcharacterization of the thermal state of resonant optical interferometers via tracking of their higher-order mode resonances

Mueller, Chris L. and Fulda, Paul and Adhikari, Rana X. and Arai, Koji and Brooks, Aidan F. and Chakraborty, Rijuparna and Frolov, Valery V. and Fritschel, Peter and King, Eleanor J. and Tanner, David B. and Yamamoto, Hiroaki and Mueller, Guido (2015) In situcharacterization of the thermal state of resonant optical interferometers via tracking of their higher-order mode resonances. Classical and Quantum Gravity, 32 (13). Art. No. 135018. ISSN 0264-9381. https://resolver.caltech.edu/CaltechAUTHORS:20150721-111255136

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Abstract

Thermal lensing in resonant optical interferometers such as those used for gravitational wave detection is a concern due to the negative impact on control signals and instrument sensitivity. In this paper we describe a method for monitoring the thermal state of such interferometers by probing the higher-order spatial mode resonances of the cavities within them. We demonstrate the use of this technique to measure changes in the advanced LIGO (aLIGO) input mode cleaner cavity geometry as a function of input power, and subsequently infer the optical absorption at the mirror surfaces at the level of 1 ppm per mirror. We also demonstrate the generation of a useful error signal for the thermal state of the aLIGO power recycling cavity by continuously tracking the first order spatial mode resonance frequency. Such an error signal could be used as an input to thermal compensation systems to maintain the interferometer cavity geometries in the presence of transients in circulating light power levels, thereby maintaining optimal sensitivity and maximizing the duty-cycle of the detectors.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0264-9381/32/13/135018 DOIArticle
http://iopscience.iop.org/0264-9381/32/13/135018/PublisherArticle
http://arxiv.org/abs/1502.02284arXivDiscussion Paper
ORCID:
AuthorORCID
Adhikari, Rana X.0000-0002-5731-5076
Tanner, David B.0000-0003-1940-4710
Mueller, Guido0000-0001-8010-742X
Additional Information:© 2015 IOP Publishing Ltd. Received 16 February 2015, revised 23 April 2015; Accepted for publication 30 April 2015; Published 12 June 2015.
Group:LIGO
Subject Keywords:gravitational wave, interferometers, thermal lensing, LIGO
Issue or Number:13
Classification Code:PACS: 04.80.Nn; 95.55.Ym; 07.60.Ly. MSC: 83C35
Record Number:CaltechAUTHORS:20150721-111255136
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150721-111255136
Official Citation:In situ characterization of the thermal state of resonant optical interferometers via tracking of their higher-order mode resonances Chris L Mueller et al 2015 Class. Quantum Grav. 32 135018
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58963
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:21 Jul 2015 20:23
Last Modified:03 Oct 2019 08:41

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