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Compensation of Strong Thermal Lensing in High-Optical-Power Cavities

Zhao, C. and Degallaix, J. and Ju, L. and Fan, Y. and Blair, D. G. and Slagmolen, B. J. J. and Gray, M. B. and Mow Lowry, C. M. and McClelland, D. E. and Hosken, D. J. and Mudge, D. and Brooks, A. and Munch, J. and Veitch, P. J. and Barton, M. A. and Billingsley, G. (2006) Compensation of Strong Thermal Lensing in High-Optical-Power Cavities. Physical Review Letters, 96 (23). Art. No. 231101. ISSN 0031-9007. doi:10.1103/PhysRevLett.96.231101.

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In an experiment to simulate the conditions in high optical power advanced gravitational wave detectors, we show for the first time that the time evolution of strong thermal lenses follows the predicted infinite sum of exponentials (approximated by a double exponential), and that such lenses can be compensated using an intracavity compensation plate heated on its cylindrical surface. We show that high finesse ~1400 can be achieved in cavities with internal compensation plates, and that mode matching can be maintained. The experiment achieves a wave front distortion similar to that expected for the input test mass substrate in the Advanced Laser Interferometer Gravitational Wave Observatory, and shows that thermal compensation schemes are viable. It is also shown that the measurements allow a direct measurement of substrate optical absorption in the test mass and the compensation plate.

Item Type:Article
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Zhao, C.0000-0001-5825-2401
Billingsley, G.0000-0002-4141-2744
Additional Information:© 2006 The American Physical Society (Received 28 February 2006; published 12 June 2006) We would like to thank the International Advisory Committee of the ACIGA/LIGO High Power Test Facility for their encouragement and advice, and Helena Armandula for technical support. This research was supported by the Australian Research Council and the Department of Education, Science and Training and by the U.S. National Science Foundation. It is a project of the Australian Consortium for Interferometric Gravitational Astronomy in collaboration with LIGO. We thank especially Barry Barish, Stan Whitcomb, and David Reitze whose support made this project possible. J. Degallaix is supported in part by Whitfeld.
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Department of Education, Science, and Training (Australia)UNSPECIFIED
Subject Keywords:Gravitational radiation detectors
Issue or Number:23
Record Number:CaltechAUTHORS:ZHAprl06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3584
Deposited By: Archive Administrator
Deposited On:18 Jun 2006
Last Modified:08 Nov 2021 19:57

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