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Proceedings Paper

New class of cw high-power diode-pumped alkali lasers (DPALs) (Plenary Paper)
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Paper Abstract

The new class of diode-pumped alkali vapor lasers (DPALs) offers high efficiency cw laser radiation at near-infrared wavelengths: cesium 895 nm, rubidium 795 nm, and potassium 770 nm. The working physical principles of DPALs will be presented. Initial 795 nm Rb and 895 nm Cs laser experiments performed using a titanium sapphire laser as a surrogate pump source demonstrated DPAL slope power conversion efficiencies in the 50-70% range, in excellent agreement with device models utilizing only literature spectroscopic and kinetic data. Using these benchmarked models for Rb and Cs, optimized DPALs with optical-optical efficiencies >60%, and electrical efficiencies of 25-30% are projected. DPAL device architectures for near-diffraction-limited power scaling into the high kilowatt power regime from a single aperture will be described. DPAL wavelengths of operation offer ideal matches to silicon and gallium arsenide based photovoltaic power conversion cells for efficient power beaming.

Paper Details

Date Published: 20 September 2004
PDF: 11 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.547954
Show Author Affiliations
William F. Krupke, Lawrence Livermore National Lab. (United States)
Raymond J. Beach, Lawrence Livermore National Lab. (United States)
Vernon K. Kanz, Lawrence Livermore National Lab. (United States)
Stephen A. Payne, Lawrence Livermore National Lab. (United States)
James T. Early, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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