22 April 2008 Laser action in bulk Cr:ZnSe crystals
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Abstract
Cr:ZnSe laser active material is one of the favourite possibility how to generate broadly tunable mid-infrared laser radiation at room-temperature. The aim of this study was to demonstrate and analyze pulsed as well as continuous-wave laser action in bulk Cr:ZnSe crystals grown by the floating-zone method or by the Bridgman method. The absorption spectra of Cr:ZnSe were measured to be from 1500 to 2000 nm, therefore various lasers were utilized for coherent longitudinal pumping of Cr:ZnSe laser, namely flashlamp-pumped Er:YAP laser (generated wavelength 1658 nm), diode-pumped Tm:YLF laser (generated wavelength 1912 nm), and diodepumped Tm:YAP laser (generated wavelength 1980 nm). In the first case, the Cr:ZnSe crystal grown by the Bridgman method was investigated. In the second case, the Cr:ZnSe crystal grown by the floating zone method was studied. In both cases, the homogeneity of the active Cr:ZnSe crystals was found reasonable good. The emission spectrum was from 2000 up to 2800 nm. The Cr:ZnSe laser generated radiation was broadly continuously tunable in the range from 2050 nm up to 2750 nm. The generated radiation beam spatial structure was close to TEM00.
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Petr Koranda, Helena Jelínková, Michal Nemec, Jan Šulc, Maxim E. Doroshenko, Tasoltan T. Basiev, Vitaly K. Komar, Andriy S. Gerasimenko, Vyacheslav M. Puzikov, V. V. Badikov, D. V. Badikov, "Laser action in bulk Cr:ZnSe crystals", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69980R (22 April 2008); doi: 10.1117/12.780432; https://doi.org/10.1117/12.780432
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