TY - JOUR
T1 - Large-angle scattered light measurements for quantum-noise filter cavity design studies
AU - Magaña-Sandoval, Fabian
AU - Adhikari, Rana X.
AU - Frolov, Valera
AU - Harms, Jan
AU - Lee, Jacqueline
AU - Sankar, Shannon
AU - Saulson, Peter R.
AU - Smith, Joshua R.
PY - 2012/8
Y1 - 2012/8
N2 - 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.
AB - 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.
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U2 - 10.1364/JOSAA.29.001722
DO - 10.1364/JOSAA.29.001722
M3 - Article
C2 - 23201890
AN - SCOPUS:84864672557
SN - 1084-7529
VL - 29
SP - 1722
EP - 1727
JO - Journal of the Optical Society of America A: Optics and Image Science, and Vision
JF - Journal of the Optical Society of America A: Optics and Image Science, and Vision
IS - 8
ER -