Overview of repetitively pulsed photolytic iodine lasers

L. A. Vern Schlie

doi:10.1117/12.232191

13 February 1996 Overview of repetitively pulsed photolytic iodine lasers

L. A. Vern Schlie

Proceedings Volume 2767, Fourth International Workshop on Iodine Lasers and Applications; (1996) https://doi.org/10.1117/12.232191
Event: Fourth International Workshop on Iodine Lasers and Applications, 1995, Trest' Castle, Czech Republic

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.

Citation Download Citation

L. A. Vern Schlie "Overview of repetitively pulsed photolytic iodine lasers", Proc. SPIE 2767, Fourth International Workshop on Iodine Lasers and Applications, (13 February 1996); https://doi.org/10.1117/12.232191

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KEYWORDS

Iodine

Resonators

Ultraviolet radiation

iodine lasers

Pulsed laser operation

Mirrors

Polarization

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