Tunable mid-infrared laser properties of Cr2+:ZnMgSe and Fe2+:ZnSe crystals

Mid-infrared Q-switched Er:YAG laser for medical applications

“…Fe 2+ :ZnSe lasers [9]). In this paper we present the mechanically Q-switched flash-lamp pumped Er:YAG laser operating at the wavelength of 2940 nm, which we believe is the most powerful erbium laser working with the repetition rate of 25 Hz.…”

Spectroscopic and laser properties of Cr2+ ions in Zn1−xMgxSe solid solutions

“…For the output coupler reflectivity R OC of 90% the slope efficiency for the Zn 1Àx Mg x Se:Cr 2+ (x ¼ 0.25) crystal was 8%. It could be mentioned here that under excitation by the flashlamp pumped YLF:Er laser (k = 1.73 lm) the maximum slope efficiency of 36% was obtained [18] though it was still twice lower compared to the best ZnSe:Cr 2+ crystal under the same pumping.…”

“…As the spectroscopic properties of TM 2+ ions are significantly influenced by their local environment in the matrix, the additional possibility to modify their properties is using the solid solutions approach. Our previous results on ZnMgSe solid solutions doped with chromium have already demonstrated the possibility to change the maximum position and the width of both absorption and fluorescence lines of chromium in these solid solutions [18,19]. In this work the fluorescence spectra, lifetime, and laser output characteristics of Zn 1Àx Mg x Se:Cr 2+ were measured in dependence on the temperature and Mg concentration.…”

Low-loss wavelength tuning of a mid-infrared Cr2+:ZnSe laser using a Littrow-mounted resonant diffraction grating

“…Over the past several years, much progress has been made in the development of tunable mid-infrared transition-metal-doped chalcogenide lasers, featuring various cavity designs and pumping schemes and with operation in the continuouswave regime and in the pulsed regime [13][14][15][16][17][18][19][20][21]. The resulting laser configurations have already yielded excellent performance and lasing efficiencies.…”