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High-efficiency diode-pumped Tm : GdLiF 4 laser at 1.9   μ m

Nicola Coluccelli, Gianluca Galzerano, Francesco Cornacchia, Alberto Di Lieto, Mauro Tonelli, and Paolo Laporta

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Abstract

Continuous-wave laser action of a Tm-doped GdLiF4 (GLF) crystal pumped by a laser diode is reported at room temperature. A comparative analysis of laser performance using GLF crystals with doping concentrations of 8 at. % and 12 at. % of Tm3+ has been carried out. A maximum output power of 1.47 W with 57% slope efficiency and a wide tunability range from 1826 to 2054 nm have been obtained at 8% Tm doping level.

© 2009 Optical Society of America

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