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.
@article{arxiv.0707.0166,
title = {Demonstration of a squeezed light enhanced power- and signal-recycled Michelson interferometer},
author = {Henning Vahlbruch and Simon Chelkowski and Boris Hage and Alexander Franzen and Karsten Danzmann and Roman Schnabel},
journal= {arXiv preprint arXiv:0707.0166},
year = {2008}
}