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Updated: May 23, 2026

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Impact of upconverted scattered light on advanced interferometric gravitational wave detectors
David J Ottaway1, Peter Fritschel, Samuel J Waldman
1Department of Physics and The Institute of Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA 5005, Australia. david.ottawway@adelaide.edu.au
Abstract:
Second generation gravitational wave detectors are being installed in a number of locations globally. These long-baseline, Michelson interferometers increase the sensitivity between 10 and 40 Hz by many orders of magnitude compared with first generation instruments. Control of non-linear noise coupling from scattered light fields is critical to achieve low frequency performance. In this paper we investigate the requirements on the attenuation of scattered light using a novel time-domain analysis and two years of seismic data from the LIGO Livingston Observatory.
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