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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 23, Iss. 20 — Oct. 15, 1998
  • pp: 1576–1578

Closed-loop phase-shifting interferometry with a laser diode

Toshihiko Yoshino and Hiroshi Yamaguchi  »View Author Affiliations


Optics Letters, Vol. 23, Issue 20, pp. 1576-1578 (1998)
http://dx.doi.org/10.1364/OL.23.001576


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Abstract

A closed-loop phase-shifting Fizeau-type interferometer at λ=633 nm was constructed with the direct frequency modulation of laser diodes. The interferometer is servo controlled fully in the phase domain where optical phases are detected by a two-frequency optical heterodyne method. Stepwise phase shifting was accomplished with good stabilization against external disturbances (vibration, air flow, etc.) and laser frequency fluctuations.

© 1998 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.5960) Lasers and laser optics : Semiconductor lasers

Citation
Toshihiko Yoshino and Hiroshi Yamaguchi, "Closed-loop phase-shifting interferometry with a laser diode," Opt. Lett. 23, 1576-1578 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-20-1576


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