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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 29, Iss. 8 — Aug. 1, 2012
  • pp: 1722–1727

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

Fabian Magaña-Sandoval, Rana X. Adhikari, Valera Frolov, Jan Harms, Jacqueline Lee, Shannon Sankar, Peter R. Saulson, and Joshua R. Smith  »View Author Affiliations


JOSA A, Vol. 29, Issue 8, pp. 1722-1727 (2012)
http://dx.doi.org/10.1364/JOSAA.29.001722


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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

OCIS Codes
(110.0110) Imaging systems : Imaging systems
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(230.1360) Optical devices : Beam splitters
(290.1483) Scattering : BSDF, BRDF, and BTDF

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: April 25, 2012
Manuscript Accepted: June 25, 2012
Published: July 27, 2012

Citation
Fabian Magaña-Sandoval, Rana X. Adhikari, Valera Frolov, Jan Harms, Jacqueline Lee, Shannon Sankar, Peter R. Saulson, and Joshua R. Smith, "Large-angle scattered light measurements for quantum-noise filter cavity design studies," J. Opt. Soc. Am. A 29, 1722-1727 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-8-1722

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