High brightness solid state lasers with phase-conjugating mirror and high average power

Hans Joachim Eichler; Andreas Haase; Baining Liu; Oliver Mehl

doi:10.1117/12.270190

4 April 1997 High-brightness solid state lasers with phase-conjugating mirror and high average power

Hans Joachim Eichler, Andreas Haase, Baining Liu, Oliver Mehl

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270190
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

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.

Citation Download Citation

Hans Joachim Eichler, Andreas Haase, Baining Liu, and Oliver Mehl "High-brightness solid state lasers with phase-conjugating mirror and high average power", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270190

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