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Proceedings Paper

Laser radar using a 1.55-um passively Q-switched microchip laser
Author(s): Philippe Thony; Laurent R. Fulbert; Pascal Besesty; Bernard Ferrand
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Paper Abstract

We investigate a laser range finder for obstacle detection in automotive field. This device is based on the use of an eye-safe pulsed microchip laser, emitting near 1.55 micrometer. The technology of solid-state microchip lasers is a good way to obtain a compact, reliable and low cost laser source. Passively Q-switched microchip lasers are of great interest for time of flight range finding: short pulse duration and high peak power have been obtained. A short pulse duration gives good precision and high peak power gives a long range of detection. The distance measurement is obtained with an ASIC chronometer which implements the time-of- flight technique. We also developed reception circuit for start and stop signals and data input/output. The ASIC chronometer is based on two complementary techniques: a clock counter for coarse measurement and multiple slopes generator for fine measurement.

Paper Details

Date Published: 28 May 1999
PDF: 8 pages
Proc. SPIE 3707, Laser Radar Technology and Applications IV, (28 May 1999); doi: 10.1117/12.351391
Show Author Affiliations
Philippe Thony, CEA-LETI (France)
Laurent R. Fulbert, CEA-LETI (France)
Pascal Besesty, CEA-LETI (France)
Bernard Ferrand, CEA-LETI (France)

Published in SPIE Proceedings Vol. 3707:
Laser Radar Technology and Applications IV
Gary W. Kamerman; Christian Werner, Editor(s)

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