title: Backscatter tolerant squeezed light source for advanced gravitational-wave detectors.
abstract: We report on the performance of a dual-wavelength resonant, traveling-wave optical parametric oscillator to generate squeezed light for application in advanced gravitational-wave interferometers. Shot noise suppression of 8.6±0.8 dB was measured across the detection band of interest to Advanced LIGO, and controlled squeezing measured over 5900 s. Our results also demonstrate that the traveling-wave design has excellent intracavity backscattered light suppression of 47 dB and incident backscattered light suppression of 41 dB, which is a crucial design issue for application in advanced interferometers.
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 0200, Australia. sheon.chua@anu.edu.au
authors.forename: Sheon S Y
authors.initials: SS
authors.lastname: Chua
authors.forename: Michael S
authors.initials: MS
authors.lastname: Stefszky
authors.forename: Conor M
authors.initials: CM
authors.lastname: Mow-Lowry
authors.forename: Ben C
authors.initials: BC
authors.lastname: Buchler
authors.forename: Sheila
authors.initials: S
authors.lastname: Dwyer
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Shaddock
authors.forename: Ping Koy
authors.initials: PK
authors.lastname: Lam
authors.forename: David E
authors.initials: DE
authors.lastname: McClelland