Share Email Print

Proceedings Paper

Pulsed Hf Laser Oscillator - Amplifier Experiments
Author(s): Garry L. Schott
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Pulsed HF chemical laser oscillator energies were scaled from millijoules to several kilojoules over the period 1970 - 1974, reaching q, 10 J with SFE, and transverse discharges, and using electron-beam initiation and elemental F2 above 1000J. This demonstrated scalability to large energy with acceptable electrical efficiency is only one prerequisite for application of this gas laser in fusion; equally important matters are achievement of focusable, % 1 ns pulses, couplable to light-element targets, all from an affordable system. Exploratory MOPA experiments are reported which address control of HF laser beam focusability and pulse duration, using SF6-based experimental oscillator - amplifier sequences and Pockels' cell switching. Simultaneous multiline lasing with 2.6 < X < 3.1 μm and high specific gain and energy density are particularly important factors encountered with HF, where amplifier pumping and lasing occur in a substantially cw temporal relationship, even in < 100 ns bursts. Time-resolved SF6 - HI oscillator spectra contain 27 simultaneous lines from six vibrational bands. An apertured, SF6 -hydrocarbon pin-discharge oscillator generates % 10 mJ of TEMoo radiation, which is amplified to % 1 J in ti 150 ns by a TEA amplifier and propagated tens of meters. A three-stage system coupling these elements through a % 1 ns electrooptic gate to a > 10 J, e-beam energized amplifier is under development.

Paper Details

Date Published: 10 February 1976
PDF: 9 pages
Proc. SPIE 0061, Optical Methods in Energy Conversion, (10 February 1976); doi: 10.1117/12.954423
Show Author Affiliations
Garry L. Schott, University of California (United States)

Published in SPIE Proceedings Vol. 0061:
Optical Methods in Energy Conversion
M. J. Lubin, Editor(s)

© SPIE. Terms of Use
Back to Top