The application of squeezed light to a frontal-phase-modulated signal-recycled interferometer is considered. We present a simple model to understand the required spectrum of squeezing so as to make the interferometer more sensitive. In particular we analyze the broad- and narrow-band cases for signal recycling and find that the sensitivity of the detector can be enhanced provided an appropriate input squeezed spectrum is used. We also discuss the effect of using squeezed light on the bandwidth of the detector.

• Received 20 June 1997

DOI:https://doi.org/10.1103/PhysRevA.57.3898