Abstract
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.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Elenna M. Capote, Amy Gleckl, Jazlyn Guerrero, Michael Rezac, Robert Wright, and Joshua R. Smith
J. Opt. Soc. Am. A 38(4) 534-541 (2021)
Cinthia Padilla, Peter Fritschel, Fabian Magaña-Sandoval, Erik Muniz, Joshua R. Smith, and Liyuan Zhang
Appl. Opt. 53(7) 1315-1321 (2014)
Yehonathan Drori, Johannes Eichholz, Tega Edo, Hiro Yamamoto, Yutaro Enomoto, Gautam Venugopalan, Koji Arai, and Rana X. Adhikari
J. Opt. Soc. Am. A 39(5) 969-978 (2022)