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Proceedings Paper

Frequency Chirp Of A Low-Pressure Hybrid TE CO[sub]2[/sub] Laser
Author(s): R. S. Eng; J. G. Grimm; C. Freed; R. G. O'Donnell
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Paper Abstract

The frequency chirp in the output of a hybrid TE CO2 laser has been measured using a heterodyne technique. Due to the low operating pressure of about 35 Torr, laser kinetic and hydrodynamic processes differ considerably in time scale from those in regular TEA CO2 lasers. We have observed that the chirps in laser pulses up to 150 μs long could not be described adequately with existing theories. Almost complete cancellation of the laser chirp was achieved by appropriate use of acousto-optic modulators external to the hybrid TE CO2 laser. The operating and output characteristics of this laser and other parameters related to chirp will be discussed.

Paper Details

Date Published: 13 September 1989
PDF: 14 pages
Proc. SPIE 1103, Laser Radar IV, (13 September 1989); doi: 10.1117/12.960557
Show Author Affiliations
R. S. Eng, Massachusetts Institute of Technology (United States)
J. G. Grimm, Massachusetts Institute of Technology (United States)
C. Freed, Massachusetts Institute of Technology (United States)
R. G. O'Donnell, Ford Aerospace Corp. (United States)

Published in SPIE Proceedings Vol. 1103:
Laser Radar IV
Richard J. Becherer, Editor(s)

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