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In situ correction of mirror surface to reduce round-trip losses in Fabry–Perot cavities

Vajente, G. (2014) In situ correction of mirror surface to reduce round-trip losses in Fabry–Perot cavities. Applied Optics, 53 (7). pp. 1459-1465. ISSN 0003-6935.

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High-finesse resonant cavities play an important role in many metrology applications such as gravitational wave detectors. The performance of these cavities can be limited by round-trip losses (RTP) generated by light that is scattered by the mirror surface defects into higher-order modes that are close to resonance. In this paper we develop a detailed model of this effect and we study possible strategies to correct the mirror surface. We show that it is possible to restrict the correction to the combination of a reduced set of surface deformations that can be reproduced on the mirror using projected heating patterns. We show with an optical simulation that by acting on the cavity mirrors it is possible to reduce RTP to the large angle scattering limit. We also show that the optimal correction can be computed without any a priori knowledge of the mirror surface, but based only on measurements of the power stored inside the cavity, thus opening up the possibility of a simple implementation of the proposed algorithm.

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Additional Information:© 2014 Optical Society of America. Received 26 December 2013; revised 31 January 2014; accepted 31 January 2014; posted 3 February 2014 (Doc. ID 203676); published 27 February 2014. The author is especially grateful to R. Day (European Gravitational Observatory) for useful discussions and comments. This research activity has been partially supported by Regione Toscana (Italy) through the program POR CreO FSE 2007-2013 of the European Community,within the project n. 18113 (ISAV). LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the United States National Science Foundation under grant PHY-0757058.
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European Community Regione Toscana (Italy) POR CreO FSE 2007-201318113 (ISAV)
Issue or Number:7
Classification Code:OCIS codes: 120.2230; 120.3180; 290.2648; 220.1080
Record Number:CaltechAUTHORS:20140418-071348477
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Official Citation:In situ correction of mirror surface to reduce round-trip losses in Fabry–Perot cavities Abstract Applied Optics, Vol. 53, Issue 7, pp. 1459-1465 (March 2014) G. Vajente
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45046
Deposited By: Ruth Sustaita
Deposited On:18 Apr 2014 15:00
Last Modified:03 Oct 2019 06:25

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