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Passively Q-switched Nd:YAG/Cr4+:YAG bonded crystal microchip laser operating at 1112 nm and its application for second-harmonic generation

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Abstract

A passively Q-switched Nd:YAG/Cr4+:YAG microchip laser operating at 1112 nm is demonstrated. Under a pump power of 5.5 W, a maximum average output power of 623 mW was obtained with T=6% output coupler, corresponding to an optical-to-optical conversion efficiency of 11.3% and a slope efficiency of 19.5%. The minimum pulse width was 2.8 ns, the pulse energy and peak power were 39.3 μJ and 14 kW, respectively. Additionally, based on the 1112 nm laser, a 230 mW 556 nm green–yellow laser was achieved within an LBO crystal.

© 2015 Optical Society of America

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