16 June 1993 High-average-power diode-pumped lasers near 2 μm
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Proceedings Volume 1865, Diode Pumping of Average-Power Solid State Lasers; (1993) https://doi.org/10.1117/12.146946
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
The development of a high brightness diode laser pump source and a scalable end-pumped resonator design are key issues in achieving high average power diode-pumped solid-state lasers without sacrificing efficiency and beam quality. The above is particularly true for the low gain, quasi-three level 2 micrometers solid-state laser systems. Spatial multiplexing of multiple diode lasers into a single optical fiber creates a high power, versatile pump source which is compatible with end-pumping. A diode laser pump module was built that produced 15 W of 785 nm light out of a 400 micrometers core diameter multimode fiber within numerical aperture of 0.25. A periodically imaged resonator (PIR) incorporates multiple end-pumping ports for high efficiency average power scaling, yet can be made very resistant to the adverse thermal effects of end-pumping. Fifteen watts of continuous wave, fundamental mode, 2 micrometers radiation were obtained from a 4% Tm:YAG PIR end-pumped with 46.5 W of fiber- coupled 785 nm diode laser emission.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David C. Shannon, David C. Shannon, David L. Vecht, David L. Vecht, Sean A. Re, Sean A. Re, Joseph J. Alonis, Joseph J. Alonis, Richard W. Wallace, Richard W. Wallace, } "High-average-power diode-pumped lasers near 2 μm", Proc. SPIE 1865, Diode Pumping of Average-Power Solid State Lasers, (16 June 1993); doi: 10.1117/12.146946; https://doi.org/10.1117/12.146946
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