Analytic treatment of high power diode pumped lasers with unstable resonator in a flowing medium

Athanasios Gavrielides; L. A. (Vern) Schlie; Robert D. Loper; Michael R. Hawks; Glen P. Perram

doi:10.1117/12.2290510

16 February 2018 Analytic treatment of high power diode pumped lasers with unstable resonator in a flowing medium

Athanasios Gavrielides, L. A. (Vern) Schlie, Robert D. Loper, Michael R. Hawks, Glen P. Perram

Author Affiliations +

Proceedings Volume 10518, Laser Resonators, Microresonators, and Beam Control XX; 1051815 (2018) https://doi.org/10.1117/12.2290510
Event: SPIE LASE, 2018, San Francisco, California, United States

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.

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Citation Download Citation

Athanasios Gavrielides, L. A. (Vern) Schlie, Robert D. Loper, Michael R. Hawks, and Glen P. Perram "Analytic treatment of high power diode pumped lasers with unstable resonator in a flowing medium", Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 1051815 (16 February 2018); https://doi.org/10.1117/12.2290510

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