Impact of backscattered light in a squeezing-enhanced interferometric gravitational-wave detector
Author(s)Chua, S. S. Y.; Sigg, D.; Schofield, R. M. S.; Frolov, V. V.; Kawabe, K.; Meadors, G. D.; Factourovich, M.; Gustafson, R.; Vorvick, C.; Landry, M.; Khalaidovski, A.; Stefszky, M. S.; Mow-Lowry, Conor Malcolm; Buchler, B. C.; Shaddock, D. A.; Lam, P. K.; Schnabel, R.; McClelland, David E.; Barsotti, Lisa; Evans, M.; Mavalvala, Nergis; Dwyer, Sheila Elizabeth; Smith, Nicolas de Mateo; ... Show more Show less
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Squeezed states of light have been recently used to improve the sensitivity of laser-interferometric gravitational-wave detectors beyond the quantum limit. To completely establish quantum engineering as a realistic option for the next generation of detectors, it is crucial to study and quantify the noise coupling mechanisms which injection of squeezed states could potentially introduce. We present a direct measurement of the impact of backscattered light from a squeezed-light source deployed on one of the 4 km long detectors of the laser interferometric gravitational wave observatory (LIGO). We also show how our measurements inform the design of squeezed-light sources compatible with the even more sensitive advanced detectors currently under construction, such as Advanced LIGO.
DepartmentMassachusetts Institute of Technology. Department of Physics; MIT Kavli Institute for Astrophysics and Space Research; LIGO (Observatory : Massachusetts Institute of Technology)
Classical and Quantum Gravity
Chua, S S Y, S Dwyer, L Barsotti, D Sigg, R M S Schofield, V V Frolov, K Kawabe, et al. “Impact of Backscattered Light in a Squeezing-Enhanced Interferometric Gravitational-Wave Detector.” Class. Quantum Grav. 31, no. 3 (January 10, 2014): 035017.