We analyze the dynamic optomechanical back-action in signal-recycled Michelson and Michelson-Sagnac interferometers that are operated off dark port. We show that in this case --- and in contrast to the well-studied canonical form of dynamic back-action on dark port --- optical damping in a Michelson-Sagnac interferometer acquires a non-zero value on cavity resonance, and additional stability/instability regions on either side of the resonance, revealing new regimes of cooling/heating of micromechanical oscillators. In a free-mass Michelson interferometer for a certain region of parameters we predict a stable single-carrier optical spring (positive spring and positive damping), which can be utilized for the reduction of quantum noise in future-generation gravitational-wave detectors.
@article{arxiv.1212.6242,
title = {Anomalous dynamic back-action in interferometers},
author = {Sergey P. Tarabrin and Henning Kaufer and Farid Ya. Khalili and Roman Schnabel and Klemens Hammerer},
journal= {arXiv preprint arXiv:1212.6242},
year = {2013}
}