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Proceedings Paper

Overview of repetitively pulsed photolytic iodine lasers
Author(s): L. A. Vern Schlie
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Paper Abstract

The performance of a repetitively pulsed, 70 joule, closed cycle 1.3 (mu) M photolytic atomic iodine laser with excellent beam quality (BQ equals 1.15) is presented. This BQ was exhibited in the fundamental mode from a M equals 3.1 confocal unstable resonator at a 0.5 Hz repetition rate. A closed cycle scrubber/laser fuel system consisting of a condensative- evaporative section, two Cu wool I2 reactor regions, and an internal turbo-blower enabled the laser to operate very reliably with low maintenance. The fuel system provided C3F7I gas at 10 - 60 torr absent of the photolytic quenching by-product I2. Using a turbo- molecular blower longitudinal flow velocities greater than 10 m/s were achieved through the 150 cm long by 7.5 multiplied by 7.5 cm2 cross sectional photolytic iodine gain region. In addition to the high laser output and excellent BQ, the resulting 8 - 12 microsecond laser pulse had a coherence length greater than 45 meters and polarization extinction ratio better than 100:1. Projections from this pulsed photolytic atomic iodine laser technology to larger energies, higher repetition rates, and variable pulse widths are discussed.

Paper Details

Date Published: 13 February 1996
PDF: 18 pages
Proc. SPIE 2767, Fourth International Workshop on Iodine Lasers and Applications, (13 February 1996); doi: 10.1117/12.232191
Show Author Affiliations
L. A. Vern Schlie, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2767:
Fourth International Workshop on Iodine Lasers and Applications
Karel Rohlena; Jarmila Kodymova; Bozena Kralikova, Editor(s)

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