A Terawatt Nd:Glass Active Mirror System

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Abstract
The Laboratory for Laser Energetics (LLE) of the University of Rochester has operated a single beam, 351 nm laser irradiation facility for several years.l This facility has been based on the Glass Development Laser (GDL); a Nd:phosphate glass laser system that is capable of generating more than 150 joules in 1 nsec pulses at 1054 nm.2 With an overall frequency tripling efficiency of greater than 50%, this facility has also been capable of generating more than 75 joules in 1 nsec at 351 nm. We now report on the upgraded GDL facility that consists of a frequency tripled, active-mirror boosted GDL laser system which produces in excess of 600 joules in 500 ps and 150 joules in 100 ps for a substantial increase in third harmonic radiation.

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