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Proceedings Paper

Multi-amplifier arrangements with phase conjugation for power scaling of solid state lasers with high beam qualtiy
Author(s): Hans Joachim Eichler; Oliver Mehl; Juergen P. Eichler
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Paper Abstract

Solid state lasers with high average output power in conjunction with high beam quality are required for high brightness applications in industry and science. In master oscillator power amplifier arrangements (MOPA) with phase conjugation the beam quality is determined by the master oscillator and largely preserved after double pass amplification. This paper deals with multi amplifier arrangements to cover a power range up to 1 kW. A serial arrangement reduces the required oscillator power to operate the amplifiers in saturation regime. Using optical systems between the amplifiers the average output power is tunable by variation of average pumping power. Several serial amplifier chains can be coupled parallel to divide the total average output power to various beam lines with moderate amplifier apertures. Different multi amplifier systems are discussed with regard to their possible average output power and beam quality. A flash lamp pumped MOPA system which supplies average output powers above 500 W is described. The system consists of two parallel coupled serial amplifier chains and two additional booster amplifiers. Beam quality and beam profile measurements have been carried out at different positions in the laser system. Average output powers up to 1 kW seem to be possible.

Paper Details

Date Published: 4 May 1999
PDF: 11 pages
Proc. SPIE 3613, Solid State Lasers VIII, (4 May 1999); doi: 10.1117/12.347675
Show Author Affiliations
Hans Joachim Eichler, Technische Univ. Berlin (Germany)
Oliver Mehl, Technische Univ. Berlin (United States)
Juergen P. Eichler, Technische Univ. Berlin (Germany)

Published in SPIE Proceedings Vol. 3613:
Solid State Lasers VIII
Richard Scheps, Editor(s)

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