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Proceedings Paper

Beam quality improvement of pulsed Nd:YAG lasers using Brillouin phase conjugation
Author(s): Hans Joachim Eichler; Andreas Haase; S. Hermann; Ralf Menzel; D. Schumann
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Paper Abstract

Using phaseconjugating mirrors (PCMs) the beam quality of solid state lasers can be improved by compensating the thermal lens of the rods at high average powers. Oscillators with one PCM as a highly reflecting mirror and double-pass amplifiers with PCMs have been investigated. PCMs are realized by stimulated Brillouin scattering (SBS). Nd:YAG and Nd,Cr:GSGG oscillators have been built with pulse repetition rates up to 45 Hz. Stable TEM00-mode operation has been obtained. Average output powers of 10 watts for 15 ns Q-switched pulses of a Nd:YAG laser and 7 watts for Nd,Cr:GSGG have been achieved. In a double pass Nd:YAG amplifier the thermal lens was compensated leading to a nearly diffraction limited beam with a maximum output power of 40 watts.

Paper Details

Date Published: 22 April 1993
PDF: 8 pages
Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); doi: 10.1117/12.143852
Show Author Affiliations
Hans Joachim Eichler, Technical Univ. of Berlin (Germany)
Andreas Haase, Technical Univ. of Berlin (Germany)
S. Hermann, Technical Univ. of Berlin (Germany)
Ralf Menzel, Technical Univ. of Berlin (Germany)
D. Schumann, Technical Univ. of Berlin (Germany)

Published in SPIE Proceedings Vol. 1834:
Laser Energy Distribution Profiles: Measurement and Applications
James M. Darchuk, Editor(s)

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