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Proceedings Paper

Compact 2-J master oscillator power amplifier (MOPA) laser system
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Paper Abstract

A compact, 2-J Master Oscillator, Power Amplifier (MOPA) laser system was designed and built to support a multiple- fiber injection experiment. The system was built in a breadboard configuration to support a risk-reduction/proof- of-concept effort. A common design approach for MOPA systems is to utilize a single-mode oscillator as the input source to the amplifier. However, to optimize this system for fiber injection, a multi-mode oscillator was chosen. A stable, multi-mode, 1053-nm, Nd:YLF laser oscillator was designed and built. A plano/concave resonator was utilized, with a 4.0-mm diameter Nd:YLF laser rod, pumped in a dual flashlamp, diffuse, close-coupled pump cavity. A lithium niobate (LiNbO3) Q-switch crystal was used in a quarter- wave scheme. This pump cavity design did not use any active cooling and was ideal for low duty cycle applications requiring no more than one shot every 60 seconds. The oscillator output was amplified using a neodymium-doped phosphate glass laser rod in a four-pass configuration. Two Joules of output energy with an output pulsewidth of 12 ns were obtained. The 9.53-mm diameter Nd:Glass amplifier rod was pumped in a dual flashlamp, diffuse, close-coupled pump cavity. Output energy, pulsewidth, far-field beam divergence and intensity profile results will be presented for a Schott LG750 amplifier rod.

Paper Details

Date Published: 14 April 2000
PDF: 8 pages
Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); doi: 10.1117/12.382785
Show Author Affiliations
Gregg L. Morelli, Honeywell, Inc. (United States)
John N. Honig, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 3929:
Solid State Lasers IX
Richard Scheps, Editor(s)

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