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Proceedings Paper

Pulse selection from a mode-locked TE CO2 laser output using a resonant acousto-optic modulator
Author(s): Yu-Lin Wang; Richard S. Eng; Michael Groden; Hsian Pei Chou; Victor H. Hasson
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Paper Abstract

The pulse separation and associated range ambiguity of a CO2 laser radar using a pulse burst waveform consisting of 1.3 ns mode-locked pulses spaced 40 ns apart was successfully doubled to 80 ns and 12 m respectively by suppressing every alternate pulse. This was done by sending the mode-locked laser output beam with 40 ns pulse spacing through a resonant Raman-Nath acousto-optic modulator driven at 18.75 MHz which is 1.5 times the drive frequency used to intracavity mode-lock the CO2 laser transmitted. The spatial filtering of the diffracted pulses results in the suppression of the alternate pulses to better than 15 dB. The throughputs for the unsuppressed pulses were greater than 95%. The laser radar capability in detecting large targets,

Paper Details

Date Published: 12 May 1998
PDF: 11 pages
Proc. SPIE 3268, Gas and Chemical Lasers and Intense Beam Applications, (12 May 1998); doi: 10.1117/12.308083
Show Author Affiliations
Yu-Lin Wang, Textron Systems Corp. (United States)
Richard S. Eng, Textron Systems Corp. (United States)
Michael Groden, Textron Systems Corp. (United States)
Hsian Pei Chou, Textron Systems Corp. (United States)
Victor H. Hasson, Textron Systems Corp. (United States)

Published in SPIE Proceedings Vol. 3268:
Gas and Chemical Lasers and Intense Beam Applications
Ernest A. Dorko; Jeffrey L. Moler, Editor(s)

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