Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
739939 | Optics & Laser Technology | 2006 | 7 Pages |
Abstract
The paper presents theoretical approach to simulation of nonlinear optical absorption in zinc selenide crystals doped with cobalt (II) ions (ZnSe:Co2+), which was reported by us earlier (Opt. Laser Technology, V. 35, (2003), 169). We used ZnSe:Co2+ crystals as saturable absorbers for generation of giant-pulse eye-safe laser radiation. It was found that minimal optical losses (maximal final transmission) occurred for ZnSe samples containing 1.6×1019 cm−3 of Co2+ ions. Band structure and photoinduced molecular dynamics simulations were performed to explain the parabolic dependence of optical losses versus Co2+ concentration. The minimum was shown to be the result of photoinduced anharmonic electron–phonon interaction.
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Authors
Z. Mierczyk, A. Majchrowski, K. Oźga, A. Slezak, I.V. Kityk,