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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 30, Iss. 28 — Oct. 1, 1991
  • pp: 4040–4045

Two-wavelength sinusoidal phase/modulating laser-diode interferometer insensitive to external disturbances

Osami Sasaki, Hiroyuki Sasazaki, and Takamasa Suzuki  »View Author Affiliations


Applied Optics, Vol. 30, Issue 28, pp. 4040-4045 (1991)
http://dx.doi.org/10.1364/AO.30.004040


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Abstract

We describe a two-wavelength laser-diode interferometer that is insensitive to external disturbances such as fluctuations in the wavelength of the laser diode and mechanical vibrations of the optical components. In sinusoidal phase-modulating interferometry this insensitivity is easily obtained by controlling the injection current of the laser diode with a feedback control system. Using an equivalent wavelength of 152 μm provided by two single-frequency laser diodes, we can measure the distance, rotation angle, and surface profile measurements with great accuracy.

© 1991 Optical Society of America

History
Original Manuscript: September 10, 1990
Published: October 1, 1991

Citation
Osami Sasaki, Hiroyuki Sasazaki, and Takamasa Suzuki, "Two-wavelength sinusoidal phase/modulating laser-diode interferometer insensitive to external disturbances," Appl. Opt. 30, 4040-4045 (1991)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-30-28-4040


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