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Proceedings Paper

High-brightness solid state lasers with phase-conjugating mirror and high average power
Author(s): Hans Joachim Eichler; Andreas Haase; Baining Liu; Oliver Mehl
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Paper Abstract

The beam quality of conventional flash lamp pumped laser rod systems is improved by using phase conjugating mirrors based on stimulated Brillouin scattering (SBS). Pulsed multi amplifier set-ups with SBS were investigated. Nd:YALO as active medium was used to avoid stress birefringence. In case of serial arrangements an optimized optical system between the individual rods is used to achieve high efficiency independent of thermal lensing. With a two amplifier system an average output power of 1 Watt up to 210 Watt in a near diffraction limited beam was realized. In case of parallel arrangements phase coupling of the individual beams was achieved using a common SBS-cell after the first amplifier pass. Instead of a Brillouin-cell a fiber phase-conjugator can be used to reduce the power threshold down to 6 kW. An average output power of 35 Watt from a pulsed MOPA-system with such a phase conjugator could be obtained. As applications high power second harmonic generation and applications in materials processing were realized.

Paper Details

Date Published: 4 April 1997
PDF: 6 pages
Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); doi: 10.1117/12.270190
Show Author Affiliations
Hans Joachim Eichler, Technical Univ. of Berlin (Germany)
Andreas Haase, Technical Univ. of Berlin (Germany)
Baining Liu, Technical Univ. of Berlin (Germany)
Oliver Mehl, Technical Univ. of Berlin (Germany)


Published in SPIE Proceedings Vol. 3092:
XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference

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