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Large-angle scattered light measurements for quantum-noise filter cavity design studies

Magaña-Sandoval, Fabian and Adhikari, Rana X. and Frolov, Valera and Harms, Jan and Lee, Jacqueline and Sankar, Shannon and Saulson, Peter R. and Smith, Joshua R. (2012) Large-angle scattered light measurements for quantum-noise filter cavity design studies. Journal of the Optical Society of America A, 29 (8). pp. 1722-1727. ISSN 1084-7529. doi:10.1364/JOSAA.29.001722.

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Optical loss from scattered light could limit the performance of quantum-noise filter cavities being considered for an upgrade to the Advanced Laser Interferometer Gravitational Wave Observatory (LIGO) gravitational-wave detectors. This paper describes imaging scatterometer measurements of the large-angle scattered light from two high-quality sample optics, a high reflector and a beamsplitter. These optics are each superpolished fused silica substrates with silica:tantala dielectric coatings. They represent the current state-of-the art optical technology for use in filter cavities. We present angle-resolved scatter values and integrate these to estimate the total scatter over the measured angles. We find that the total integrated light scattered into larger angles can be as small as 4 ppm.

Item Type:Article
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Adhikari, Rana X.0000-0002-5731-5076
Harms, Jan0000-0002-7332-9806
Additional Information:© 2012 Optical Society of America. Received April 25, 2012; accepted June 25, 2012; posted June 27, 2012 (Doc. ID 167231); published July 27, 2012. This work is supported by the Research Corporation for Science Advancement Cottrell College Science Award #19839 and by National Science Foundation Awards PHY- 0970147, PHY-0854812, and PHY-0555406. We thank our colleagues in the LIGO Scientific Collaboration for fruitful discussions about this research and for review of this manuscript.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Research Corporation for Science Advancement Cottrell College Science Award19839
Issue or Number:8
Classification Code:OCIS codes: 290.1483, 120.5820, 110.0110, 230.1360, 120.3180
Record Number:CaltechAUTHORS:20121008-091127278
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34741
Deposited By: Tony Diaz
Deposited On:09 Oct 2012 21:58
Last Modified:09 Nov 2021 23:10

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