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Applied Optics

Applied Optics


  • Vol. 30, Iss. 25 — Sep. 1, 1991
  • pp: 3612–3616

Three-color laser-diode interferometer

Peter de Groot  »View Author Affiliations

Applied Optics, Vol. 30, Issue 25, pp. 3612-3616 (1991)

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The combined optical spectrum of a pair of multimode laser diodes is composed of a large number of well-defined wavelengths. This work reports the use of three of these wavelengths in a phase-modulated interferometer to measure absolute distance over 360-μm intervals with a resolution of 0.5 nm. The laboratory demonstration system is composed of a three-wavelength source coupled by single-mode fiber to a compact interferometric probe. This system has been used for displacement measurement and profiling of optical surfaces.

© 1991 Optical Society of America

Original Manuscript: September 17, 1990
Published: September 1, 1991

Peter de Groot, "Three-color laser-diode interferometer," Appl. Opt. 30, 3612-3616 (1991)

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