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Proceedings Paper

Solid state lasers with pulse compression by transient stimulated Brillouin and Raman scattering
Author(s): A. S. Dement'ev; R. Buzelis; E. Kosenko; E. Murauskas; R. Navakas
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Paper Abstract

New results of the numerical and experimental investigation of compact solid-state lasers with pulse compression by backward stimulated scattering and multipass laser amplifiers are presented. New models of the master oscillator with the combined passively and actively Q-switched Nd:YAG produce single-mode pulses whose energies are approximately 6 mJ, duration < 2 ns and timing jitter approximately 5 ns. Investigations of Cr4+:YAG crystal bleaching by 150 ps and 2.3 ns long pulses with the Gaussian intensity distribution permitted to obtain more reliable values for ground and excited state absorption cross sections. Application of the active Q-switching with negative feedback enabled to achieve synchronized single-mode pulses with the duration of < 2 ns and the energy of approximately 7 mJ with energy deviations of +/- 1.5% and timing jitter of < 0.5 ns. It is shown that the SBS-compressor filled with heavy fluorocarbons and pumped by amplified (approximately 40 mJ) symmetrical short (approximately 2 ns) pulses can produce the Stokes pulses with 25 mJ energy and the duration as short as 90 ps. A modified Nd:YAG laser with a hybridly Q-switched master oscillator and heavy freon as a Brillouin medium and a multipass Nd:YAG amplifier can generate pulses with the duration of approximately 100 ps and the energy of > 0.6 J at repetition rates of approximately 10 Hz with pulse jitter approximately 1 ns.

Paper Details

Date Published: 10 April 2001
PDF: 6 pages
Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); doi: 10.1117/12.425476
Show Author Affiliations
A. S. Dement'ev, Institute of Physics (Lithuania)
R. Buzelis, Institute of Physics (Lithuania)
E. Kosenko, Institute of Physics (Lithuania)
E. Murauskas, Institute of Physics (Lithuania)
R. Navakas, Vytautas Magnus Univ. (Lithuania)

Published in SPIE Proceedings Vol. 4415:
Optical Organic and Inorganic Materials
Steponas P. Asmontas; Jonas Gradauskas, Editor(s)

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