Demonstration of a squeezed light enhanced power- and signal-recycled Michelson interferometer
arXiv:0707.0166 · doi:10.1103/PhysRevLett.95.211102
Abstract
We report on the experimental combination of three advanced interferometer techniques for gravitational wave detection, namely power-recycling, detuned signal-recycling and squeezed field injection. For the first time we experimentally prove the compatibility of especially the latter two. To achieve a broadband non-classical sensitivity improvement we applied a filter cavity for compensation of quadrature rotation. Signal to noise ratio was improved by up to 2.8 dB beyond the coherent state's shot noise. The complete set-up was stably locked for arbitrary times and characterized by injected single-sideband modulation fields.
arXiv comment4 pages, 3 figures
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