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Applied Optics

Applied Optics


  • Vol. 42, Iss. 1 — Jan. 1, 2003
  • pp: 91–96

Phase-shift-locked interferometer with a wavelength-modulated laser diode

Ribun Onodera and Yukihiro Ishii  »View Author Affiliations

Applied Optics, Vol. 42, Issue 1, pp. 91-96 (2003)

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A phase-shift-locked interferometer has been constructed for distance measurement. A phase shift produced by sawtooth-current modulation of a laser diode is locked to a phase difference preset by polarization optics that consists of a quarter-wave plate and polarizers through an electrical feedback technique. An optical path difference can be measured from the locked sawtooth-wave current amplitude in real time. The sensitivity of the interferometer is discussed.

© 2003 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(140.2020) Lasers and laser optics : Diode lasers

Original Manuscript: June 17, 2002
Revised Manuscript: October 8, 2002
Published: January 1, 2003

Ribun Onodera and Yukihiro Ishii, "Phase-shift-locked interferometer with a wavelength-modulated laser diode," Appl. Opt. 42, 91-96 (2003)

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