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Characterization of Core Optics in Gravitational-Wave Detectors: Case Study of KAGRA Sapphire Mirrors

Hirose, Eiichi and Billingsley, Garilynn and Zhang, Liyuan and Yamamoto, Hiroaki and Pinard, Laurent and Michel, Christophe and Forest, Danièle and Reichman, Bill and Gross, Mark (2020) Characterization of Core Optics in Gravitational-Wave Detectors: Case Study of KAGRA Sapphire Mirrors. Physical Review Applied, 14 (1). Art. No. 014021. ISSN 2331-7019. doi:10.1103/PhysRevApplied.14.014021.

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We report the characterization of superlow-loss optics used in the second-generation gravitational-wave detectors currently in operation. The sapphire test-mass mirrors in the KAGRA detector are introduced as an example, but the techniques here are common to all detectors. In this work, we discuss mainly the surface topography obtained by interferometric techniques and the optical properties obtained with special setups.

Item Type:Article
Related URLs:
URLURL TypeDescription
Hirose, Eiichi0000-0002-2925-232X
Billingsley, Garilynn0000-0002-4141-2744
Zhang, Liyuan0000-0002-0898-787X
Yamamoto, Hiroaki0000-0001-6919-9570
Additional Information:© 2020 American Physical Society. Received 19 March 2020; revised 7 April 2020; accepted 1 June 2020; published 8 July 2020. This work was partially supported by the JSPS Leading-Edge Research Infrastructure Program, JSPS Grant-in-Aid for Specially Promoted Research 26000005, and the Joint Research Program of the Institute for Cosmic Ray Research, University of Tokyo. E.H. acknowledges the warm support and accommodation of the LIGO Laboratory, Caltech, and the use of its facilities for characterizing the KAGRA core optics. E.H. also thanks John Tardif and his team members at Coastline Optics for helping the KAGRA project by preparing various optics, including several sapphire test pieces, in a very quick and accurate manner. E.H. thanks Shinkosha Co. Ltd. for developing low-absorption sapphire crystals that satisfied our requirements. The authors thank Yoichi Aso, Yuta Michimura, and Matteo Leonardi for their useful comments, especially on recent findings in the detector related to the characterization results presented in the article.
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)26000005
University of TokyoUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20200708-103508216
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104271
Deposited By: Tony Diaz
Deposited On:08 Jul 2020 17:47
Last Modified:16 Nov 2021 18:30

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