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254 W laser-diode dual-end-pumped Tm:YAP InnoSlab laser

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Abstract

A compact laser-diode dual-end-pumped 3 at. % a-cut Tm:YAP InnoSlab laser with the output power of 254 W in 1.99 µm has been demonstrated. The slope efficiency with respect to the incident pumped power is 45.9%, and the optical-to-optical conversion efficiency is 36.5%. The RMS stability of the maximum output power is better than 0.1% in 30 min. Beam quality factors $ M^2 $ are 250 in the $ x $ direction and 4.7 in the $ y $ direction. Additionally, the shape of the output laser spot is rectangular.

© 2020 Optical Society of America

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