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We describe a compact, broadly tunable, continuous-wave (cw) Cr 2+ :ZnSe laser pumped by a thulium fiber laser at 1800nm. In the experiments, a polycrystalline ZnSe sample with a chromium concentration of 9.5×10 18 cm −3 was used. Free-running laser output was around 2500nm. Output couplers with transmissions of 3%, 6%, and 15% were used to characterize the power performance...
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