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The development of a 5-cm aperture ceramic Yb:YAG edge-pumped disk laser amplifier
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Paper Abstract

We have previously shown that the ceramic Yb:YAG-based edge-pumped disk laser amplifier offers significant advantages over traditional face-pumped disk amplifiers. Such amplifiers may be used in laser drivers for inertial confinement fusion, laser acceleration, and other applications, which require a combination of high-pulse energy and high-average power. Unlike face pumping, the edge-pumping architecture beneficially allows for reduced Yb doping and enables a construction of very simple, compact, and completely modular amplifiers comprising identical and interchangeable gain modules. This paper reports on the development and early testing of a Ø5-cm aperture edge-pumped ceramic Yb:YAG disk amplifier module pumped by 100-kW diodes at up to 20 Hz and cooled by a high-velocity gas flow at near ambient temperature. In early testing, the amplifier module has demonstrated very uniform transverse gain and 37 J of stored energy. A laser oscillator operating in a quasi-cw mode with 1- ms pump pulses produced 43 kW of instantaneous laser power and 31 J of energy at a wavelength of 1029 nm. Experimental results compare well to model predictions.

Paper Details

Date Published: 20 March 2019
PDF: 11 pages
Proc. SPIE 10898, High Power Lasers for Fusion Research V, 108980J (20 March 2019); doi: 10.1117/12.2511051
Show Author Affiliations
John Vetrovec, Aqwest, LLC (United States)
David M. Filgas, Aqwest, LLC (United States)
Drew A. Copeland, Aqwest, LLC (United States)
Roger R. Thibault, Aqwest, LLC (United States)
Suraj J. Thiagarajan, Aqwest, LLC (United States)
Eldridge Briscoe, General Atomics Aeronautical Systems, Inc. (United States)

Published in SPIE Proceedings Vol. 10898:
High Power Lasers for Fusion Research V
Abdul A. S. Awwal; Constantin L. Haefner, Editor(s)

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