We demonstrate a tunable, narrow linewidth, linearly polarized and gain-switched Cr 2+ :ZnSe laser pumped by a Tm, Ho:YVO 4 laser at 10 kHz pulse repetition frequency. By setting a quartz birefringent filter with a Brewster angle in the cavity, the linearly polarized Cr 2+ :ZnSe laser can be continuously tuned from 2.45 to 2.50 μm, and the output power was almost not changed. In addition, the linewidth was compressed to about 5 nm. At the incident pump power to the crystal of 14 W, the maximum output power of 2.84 W was obtained, corresponding to a slope efficiency of 20.4%.
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Meng et al. (2011) studied this question.
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