We propose a new interferometer technique for high-precision phase measurements such as those in gravitational wave detection. The technique utilizes a pair of optically coupled resonators that provide identical resonance conditions for the upper as well the lower phase modulation signal sidebands. This symmetry significantly reduces the noise spectral density in a wide frequency band compared with single-sideband recycling topologies of current and planned gravitational wave detectors. Furthermore, the application of squeezed states of light becomes less demanding.
© 2007 Optical Society of America
Original Manuscript: December 7, 2006
Manuscript Accepted: January 9, 2007
Published: March 19, 2007
André Thüring, R. Schnabel, H. Lück, and K. Danzmann, "Detuned Twin-Signal-Recycling for ultrahigh-precision interferometers," Opt. Lett. 32, 985-987 (2007)