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Analytic treatment of high power diode pumped lasers with unstable resonator in a flowing medium
Author(s): Anthanasios Gavrielides; L. A. (Vern) Schlie; Robert D. Loper; Michael R. Hawks; Glen P. Perram
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Paper Abstract

Diode-pumped alkali metal vapor lasers (DPAL) offer significant promise for high average power. The DPAL system has high gain and will high output coupling and an unstable resonator to achieve excellent beam quality. We analyze the Rb-He system using average equations for the pump, laser and populations, including amplified spontaneous emission. We extend the formulation to include flow and temperature release and study its effects on the laser efficiency and beam quality. The design and analysis of the DPAL resonator and the influence of spatial variations in gain medium on far field beam quality are developed. A systematic study of the influence of gain medium aberrations, flow geometry, and resonator design on far field beam quality is reported. The relative advantages of longitudinal and transverse flow geometries to beam quality are evaluated. Finally, coupling of the pump and laser radiation fields is dramatic in the DPAL system. The standard approaches to merging CFD analysis of the gain medium with wave optics resonator simulations will require new techniques.

Paper Details

Date Published: 16 February 2018
PDF: 11 pages
Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 1051815 (16 February 2018); doi: 10.1117/12.2290510
Show Author Affiliations
Anthanasios Gavrielides, Air Force Institute of Technology (United States)
Oak Ridge Institute for Science and Education (United States)
The Univ. of New Mexico (United States)
L. A. (Vern) Schlie, Air Force Institute of Technology (United States)
Oak Ridge Institute for Science and Education (United States)
Robert D. Loper, Air Force Institute of Technology (United States)
Michael R. Hawks, Air Force Institute of Technology (United States)
Perduco Corp. (United States)
Glen P. Perram, Air Force Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10518:
Laser Resonators, Microresonators, and Beam Control XX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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