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Proceedings Paper

Two-wavelength laser diode interferometer with a time-sharing heterodyne modulation
Author(s): Takamasa Suzuki; Takatsugu Aizaki; Osami Sasaki; Takeo Maruyama
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Paper Abstract

A new type of two-wavelength interferometer for the measurement of absolute distance is described. Since the wavelength of the laser diode is temporally multiplexed, only one laser diode light-source is required, thus eliminating the necessity of aligning two independent optical axes. Absolute distance is calculated from the difference of the phases in the interference signals generated by each wavelength. The self-correlation function is applicable in our system for detecting this phase- difference between two kinds of interference signals, thereby, the signal processing is very simple and there is a possibility that the real-time distance measurement becomes possible in our new method.

Paper Details

Date Published: 27 March 1997
PDF: 8 pages
Proc. SPIE 2993, Lasers as Tools for Manufacturing II, (27 March 1997); doi: 10.1117/12.270028
Show Author Affiliations
Takamasa Suzuki, Niigata Univ. (Japan)
Takatsugu Aizaki, Niigata Univ. (Japan)
Osami Sasaki, Niigata Univ. (Japan)
Takeo Maruyama, Niigata Univ. (Japan)


Published in SPIE Proceedings Vol. 2993:
Lasers as Tools for Manufacturing II
Leonard R. Migliore; Ronald D. Schaeffer, Editor(s)

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