Diode-pumped CW and passively Q-switched solid-state lasers with an ultra-thin Nd:YVO₄ crystal as the gain medium

Li, Cheng, Song, Jie, Shen, Deyuan, Xu, Jianqui and Ueda, Ken-ichi (2000) Diode-pumped CW and passively Q-switched solid-state lasers with an ultra-thin Nd:YVO₄ crystal as the gain medium. Optics Communications, 186 (4-6), 245-250. (doi:10.1016/S0030-4018(00)01074-9).

Abstract

We demonstrated diode-pumped CW and passively Q-switched Nd:YVO₄ laser using an ultra-thin (100 µm) crystal as the gain medium. The experiments showed that the laser can keep operating in single transverse mode with a very narrow output spectrum even when the incident pump power increased to several ten times above the threshold. Using the same linear plano-concave cavity, we realized stable passively Q-switched Nd:YVO₄ laser by inserting a Cr⁴⁺:YAG crystal into the cavity. Contrast to these, diode-pumped normal Nd:YVO₄ laser using thick (e.g. 1 mm) crystal as the gain medium often operates in multiple modes and is difficult to realize Cr⁴⁺:YAG passively Q-switched laser in such a cavity.

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