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Proceedings Paper

FMCW technique using self-mixing inside a LiTaO3-Nd:YAG microchip laser for absolute distance and velocity measurements
Author(s): Philippe Nerin; Pierre Labeye; P. Bezesty; Pierre Puget; Germain H. Chartier; M. Bergeon
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Paper Abstract

In this paper a theoretical and an experimental study of a sensor which uses a self-mixing interference effect inside a microchip laser are reported. The so-called FMCW approach has been implemented by using a intracavity electrooptic modulator which provides a total 10 GHz frequency-shift of the optical wave emitted by a Nd3+:YAG-LiTaO3 microchip laser. We demonstrated that the resonant behavior of the microchip laser provides a substantial amplification of the return wave and that such a phenomenon can be used to perform a highly sensitive detection for absolute distance (from 1 to 20 m +/- 0.1%) and velocity (from 0.1 to 25 m.s-1 +/- 0.1%) measurements of a remote scattering target.

Paper Details

Date Published: 25 September 1997
PDF: 12 pages
Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); doi: 10.1117/12.287741
Show Author Affiliations
Philippe Nerin, CEA-LETI (France)
Pierre Labeye, CEA-LETI (France)
P. Bezesty, CEA-LETI (France)
Pierre Puget, CEA-LETI (France)
Germain H. Chartier, CEA-LETI (France)
M. Bergeon, CEA-LETI (France)

Published in SPIE Proceedings Vol. 3100:
Sensors, Sensor Systems, and Sensor Data Processing
Otmar Loffeld, Editor(s)

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