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Diode-pumped 3 μm Er3+:BaY2F8 cw laser with optimized Er3+-concentration

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Abstract

A systematic investigation on 12 monoclinic Er3+:BaY2F8 crystals with different dopant concentrations (CEr = 530 %) and crystal orientations was conducted to optimize the laser performance in this new 3 μm laser medium by laser-diode pumping. The highest slope efficiency of 32 % near the quantum defect (35 %) was obtained with a 10 % doped Er3+:BaY2F8 crystal with the orientation (010) and a length of 3.5 mm. A maximum output power of 160 mW was achieved at an absorbed pump power of 550 mW at a wavelength of 970 nm.

© 1997 Optical Society of America

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