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Proceedings Paper

Wavelength-shifting phase-conjugate interferometry for distance measurements with an external-cavity laser diode
Author(s): Hisashi Maki; Takeshi Takahashi; Yukihiro Ishii
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Paper Abstract

Laser-diode phase-conjugate interferometer with two self-pumped (cat) phase-conjugate mirrors instead of two ordinary mirrors is constructed for distance measurements over extended ranges. The measurement is based on frequency-modulated continuous wave techniques. An external-cavity laser diode (ECLD) is used as a light source in a phase-conjugate wavefront-matched interferometer. The interferometer is insensitive to spatially nonuniform phase distortion, but can only detect the spatially uniform phase change introduced by the displacement of one cat mirror. The error due to the nonlinear frequency chirping of an ECLD can be free from the reference interferometer of fixed arms with a known optical path difference.

Paper Details

Date Published: 20 January 2005
PDF: 7 pages
Proc. SPIE 5633, Advanced Materials and Devices for Sensing and Imaging II, (20 January 2005); doi: 10.1117/12.580469
Show Author Affiliations
Hisashi Maki, Univ. of Industrial Technology (Japan)
Takeshi Takahashi, Univ. of Industrial Technology (Japan)
Yukihiro Ishii, Univ. of Industrial Technology (Japan)


Published in SPIE Proceedings Vol. 5633:
Advanced Materials and Devices for Sensing and Imaging II
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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