Mid-infrared Cr2+:ZnSe random powder lasers.
We report simple methods of laser active Cr2+:ZnSe powder fabrication with average grain sizes of either approximately 10 or approximately 1 microm without crystal growth stage. Pure, uniformly mixed ZnSe and CrSe powders annealed at 1000 masculineC for 3 days in a sealed evacuated (approximately 10(-4) Torr) quartz ampoule exhibited middle-infrared laser action at room temperature under 1.56 microm excitation of D(2) Raman shifted radiation of Nd:YAG laser. The output-input characteristic clearly demonstrated the threshold-like behavior of the output signal with the threshold energy level of 0.5 and 3 mJ in 2.9 mm spot for 10 and 1 microm grain sizes, respectively.
Department of Physics, University of Alabama at Birmingham, CH 3101, 1530 3rd Avenue South, Birmingham, Alabama 35294, USA.
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Kim
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Martyshkin
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Fedorov
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Mirov
D002857:Chromium / Q000737:chemistry*; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D007834:Lasers; D015233:Models, Statistical; D011208:Powders; D018036:Selenium Compounds / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D011208:Powders; D018036:Selenium Compounds; D017967:Zinc Compounds; D002857:Chromium; C044696:zinc selenide