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12 July 2019 Study of the coherent perturbation of a Michelson interferometer due to the return from a scattering surface
Vitalii Khodnevych, Sibilla Di Pace, Jean-Yves Vinet, Nicoleta Dinu-Jaeger, Michel Lintz
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 111807T (2019) https://doi.org/10.1117/12.2536200
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
Abstract
We describe a setup based on Michelson interferometry for coherent measurements of the backscattered light from a low roughness optical surface under test. Special data processing was developed for the extraction of the useful signal from the various stray contributions to the coherent signal. We achieve coherent detection of light scattered by a mirror down to -130 dB in optical power. We characterize the dependence of the backscattered light with spot position and incidence angle. Results of cross-polarization scattering coherent measurements and preliminary results of dust deposition experiment are presented here. This work represents the first step in the experimental evaluation of the coherent perturbation induced by the scattered light in the space gravitational wave detector of the LISA mission.
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Vitalii Khodnevych, Sibilla Di Pace, Jean-Yves Vinet, Nicoleta Dinu-Jaeger, and Michel Lintz "Study of the coherent perturbation of a Michelson interferometer due to the return from a scattering surface", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111807T (12 July 2019); https://doi.org/10.1117/12.2536200
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KEYWORDS
Backscatter
Modulation
Light scattering
Mirrors
Scattering
Polarization
Phase modulation
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