Abstract
We present a description of a system for automatic alignment of optical interferometers. The technique relies on using differential phase modulation to permit the detection of the phase difference between two fundamental-mode Gaussian beams at the output of an interferometer. Measurements of the spatially varying phase difference between the two beams by use of one or more multielement photodiodes permits information to be derived about the mismatch in overlap between the phase fronts at the output of the interferometer.
© 1994 Optical Society of America
Full Article | PDF ArticleMore Like This
Euan Morrison, Brian J. Meers, David I. Robertson, and Henry Ward
Appl. Opt. 33(22) 5037-5040 (1994)
K. Kawabe, N. Mio, and K. Tsubono
Appl. Opt. 33(24) 5498-5505 (1994)
Hartmut Grote, Gerhard Heinzel, Andreas Freise, Stefan Goßler, Benno Willke, Harald Lück, Harry Ward, Morag M. Casey, Kenneth A. Strain, David Robertson, Jim Hough, and Karsten Danzmann
Appl. Opt. 43(9) 1938-1945 (2004)