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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 33, Iss. 7 — Mar. 1, 1994
  • pp: 1194–1197

Fringe-counting technique used to lock a suspended interferometer

Fabrizio Barone, Enrico Calloni, Rosario De Rosa, Luciano Di Fiore, Francesco Fusco, Leopoldo Milano, and Guido Russo  »View Author Affiliations


Applied Optics, Vol. 33, Issue 7, pp. 1194-1197 (1994)
http://dx.doi.org/10.1364/AO.33.001194


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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

History
Original Manuscript: November 3, 1992
Revised Manuscript: May 25, 1993
Published: March 1, 1994

Citation
Fabrizio Barone, Enrico Calloni, Rosario De Rosa, Luciano Di Fiore, Francesco Fusco, Leopoldo Milano, and Guido Russo, "Fringe-counting technique used to lock a suspended interferometer," Appl. Opt. 33, 1194-1197 (1994)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-33-7-1194

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