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Proceedings Paper

Serial arrangement for high-power solid state amplifiers with phase-conjugating mirror
Author(s): Hans Joachim Eichler; Andreas Haase; Oliver Mehl
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Paper Abstract

To increase the beam quality of existing lasers we developed flash lamp pumped master oscillator power amplifier systems (MOPA) with phase conjugating SBS-mirrors. The used Nd:YALO as active material shows no remarkable stress birefringence resulting in a simple optical arrangement. With a single amplifier rod average output powers of 4 watt up to 140 watt were realized with a beam quality of 1.1 times the diffraction limit. Serial arrangements of amplifiers were investigated to increase the average output power. By using an optical system between the individual rods the pump power can be tuned over a wide range. The parameters of the used two lens system can be optimized to avoid damage of optical components and secure a high efficiency independent of thermal lensing. With a two amplifier system an average output power of 1 watt up to 210 watts in a near diffraction limited beam could be realized. The system works with a repetition rate of 100 Hz and emits per flash a train of 13 Q-switched pulses with an FWHM of about 90 ns. Calculations for a serial arrangement of six amplifiers were made and show the possibility to achieve an average output power of 1 kW.

Paper Details

Date Published: 26 August 1996
PDF: 9 pages
Proc. SPIE 2788, High-Power Lasers: Gas and Solid State Lasers, (26 August 1996); doi: 10.1117/12.248610
Show Author Affiliations
Hans Joachim Eichler, Technische Univ. Berlin (Germany)
Andreas Haase, Technische Univ. Berlin (Germany)
Oliver Mehl, Technische Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 2788:
High-Power Lasers: Gas and Solid State Lasers
Tommaso Letardi; Horst Weber, Editor(s)

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