Abstract
We implement a digital fringe-counting technique to measure in real time the relative mirror displacement of a suspended Michelson interferometer with modulated optical path length for oscillations much larger than the laser wavelength (λ). This provides the proper error signal for a servo mechanism that reduces the relative displacement within λ/2. The implemented technique does not require extra optics or polarizers and thus can be used for interferometric gravitational wave detectors as a starting procedure to get the system locked.
© 1994 Optical Society of America
Full Article | PDF ArticleMore Like This
F. Barone, E. Calloni, L. Di Fiore, A. Grado, L. Milano, and G. Russo
Appl. Opt. 34(35) 8100-8105 (1995)
K. Kawabe, N. Mio, and K. Tsubono
Appl. Opt. 33(24) 5498-5505 (1994)
Euan Morrison, Brian J. Meers, David I. Robertson, and Henry Ward
Appl. Opt. 33(22) 5037-5040 (1994)