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ZnSe:Co—nonlinear optical absorber for giant-pulse eye-safe lasers |
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| Authors: | Z. Mierczyk A. Majchrowski I. V. Kityk W. Gruhn |
| Affiliation: | a Institute of Optoelectronics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland b Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland c Institute of Physics, WSP, Al. Armii Krajowej 13/15, 42-201, Cz?stochowa, Poland |
| Abstract: | ZnSe:Co2+ crystals were grown by the Bridgeman technique. Optical absorption measurements showed non-uniform distribution of Co2+ ions along the as-grown crystals. Using Pfann formula the distribution coefficient of Co2+ ions between crystal and melt was estimated to be 0.5. Transmission dependence on laser power at λ=1535 nm was investigated for different Co2+ ions concentration. Maximal final transmission was found for ZnSe samples containing 1.6×1019 cm−3 of Co2+ ions. Obtained ZnSe:Co2+ samples were used as saturable absorbers to generate giant-pulse eye-safe laser radiation. KIGRE QE-7S rod placed in resonator cavity was used as active element. |
| Keywords: | ZnSe:Co2+ Nonlinear optical absorber Eye-safe lasers |
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