The efficient lasing of a Cr 2+ :CdSe single crystal pumped by 1.94-μm, 300-μs pulses from a Tm:YAP laser was obtained. The Cr 2+ :CdSe laser with a nonselective resonator emitted up to 17 mJ at a wavelength of ∼2.65 μm with the quantum slope efficiency of 63% with respect to the absorbed pump energy. The absorption coefficient of the Cr 2+ :CdSe crystal at the laser wavelength did not exceed 0.045 cm -1 . By using a resonator with a dispersion prism, the laser wavelength was continuously tuned in the spectral range from 2.26 to 3.61 μm.
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Akimov et al. (2008) studied this question.
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