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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN 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)
http://dx.doi.org/10.1364/AO.42.000091


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Abstract

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

Citation
Ribun Onodera and Yukihiro Ishii, "Phase-Shift-Locked Interferometer with a Wavelength-Modulated Laser Diode," Appl. Opt. 42, 91-96 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-1-91


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References

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