FMCW technique using self-mixing inside a LiTaO3-Nd:YAG microchip laser for absolute distance and velocity measurements

Philippe Nerin; Pierre Labeye; P. Bezesty; Pierre Puget; Germain H. Chartier; M. Bergeon

doi:10.1117/12.287741

25 September 1997 FMCW technique using self-mixing inside a LiTaO3-Nd:YAG microchip laser for absolute distance and velocity measurements

Philippe Nerin, Pierre Labeye, P. Bezesty, Pierre Puget, Germain H. Chartier, M. Bergeon

Author Affiliations +

Proceedings Volume 3100, Sensors, Sensor Systems, and Sensor Data Processing; (1997) https://doi.org/10.1117/12.287741
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

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.

Citation Download Citation

Philippe Nerin, Pierre Labeye, P. Bezesty, Pierre Puget, Germain H. Chartier, and M. Bergeon "FMCW technique using self-mixing inside a LiTaO3-Nd:YAG microchip laser for absolute distance and velocity measurements", Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); https://doi.org/10.1117/12.287741

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