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Optical Engineering

Repetition-rate angularly multiplexed krypton fluoride laser system
Author(s): Matthew F. Wolford; Matthew C. Myers; John L. Giuliani; John D. Sethian; Patrick M. Burns; Frank Hegeler; Reginald L. Jaynes
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Paper Abstract

The first results are reported from a repetitively pulsed, electron-beam-pumped angularly multiplexed krypton fluoride (KrF) laser system. This laser system, called Electra, was constructed at the U.S. Naval Research Laboratory. The technologies developed on Electra are scalable to a full-size fusion power plant beam line and should meet the inertial fusion energy (IFE) requirements for durability, efficiency, and cost. As in a full-size fusion power plant beam line, Electra is a multistage laser system that consists of a commercial discharge laser, a 175-keV electron-beam-pumped (40-ns flat-top) preamplifier, and a 500-keV (100-ns flat-top) main amplifier. Angular multiplexing is used in the optical layout to provide pulse length control and to maximize laser extraction from the amplifiers. The laser system initially demonstrated 452 J in a single shot and 1.585 kJ total energy in a one-second, 5-Hz burst. The preamplifier alone produces a 25-J KrF output with two angularly multiplexed beams. Extraction volumes were calculated for both a single-pass and a double-pass angularly multiplexed amplifier. A standard ray trace must be used to calculate the extraction volumes for the double-pass amplifier with focusing elements.

Paper Details

Date Published: 1 October 2008
PDF: 11 pages
Opt. Eng. 47(10) 104202 doi: 10.1117/1.3000593
Published in: Optical Engineering Volume 47, Issue 10
Show Author Affiliations
Matthew F. Wolford, Naval Research Lab. (United States)
Matthew C. Myers, Naval Research Lab. (United States)
John L. Giuliani, Naval Research Lab. (United States)
John D. Sethian, Naval Research Lab. (United States)
Patrick M. Burns, Naval Research Lab. (United States)
Frank Hegeler, Naval Research Lab. (United States)
Reginald L. Jaynes, Naval Research Lab. (United States)

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