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Doroshenko, M.E., Basiev, T.T., Koranda, P., Jelinkova, H., Nemec, M., Cech, M., Sulc, J., Komar, V.K., Gerasimenko, A.S., Badikov, V.V. and Badikov, D.V. (2009) Bulk Fe:ZnSe Laser Gain-Switched by the Q-Switched Er:YAG Laser. In: Clarkson, A., Hodgson, N. and Shori, R.K., Eds., Solid State Lasers XVIII: Technology and Devices, Proceedings of SPIE, Vol. 7193, 71931K.

has been cited by the following article:

• TITLE: Nonlinear Change in Refractive Index and Transmission Coefficient of ZnSe:Fe2+ at Long-Pulse 2.94-μm Excitation

  AUTHORS: Alexander V. Kir’yanov, Nikolai N. Il’ichev, Elmira S. Gulyamova, Alexander S. Nasibov, Peter V. Shapkin

  KEYWORDS: Nonlinear Refractive index, Nonlinear Transmission, Z-Scan Technique, Thermal lens, ZnSe:Fe2+

  JOURNAL NAME: Optics and Photonics Journal, Vol.5 No.1, January 20, 2015

  ABSTRACT: An experimental study of the nonlinear changes in refractive index and transmission coefficient of single-crystal ZnSe:Fe2+, fabricated through the Fe-diffusion method, at long-pulse (~300 ns), sub-mJ, 2.94-mm Z-scan probing is reported. As well, a theoretical model based on the generalized Avizonis-Grotbeck equations is developed and applied for straightforward fitting of the open- and closed-aperture Z-scans, obtained for ZnSe:Fe2+ with different Fe2+ centers concentrations. The modeling results reveal that the contributions in the absorption and refractive index nonlinearities of ZnSe:Fe2+ are “common” resonant-absorption saturation (the minor part) and pulse-induced heating of the samples (the major part), which are strongly dependent on Fe2+ concentrations. Large values of the index change (>~10-3) and partial resonant-absorption bleaching (limited by ~50%), both produced via the thermal effect mainly, are the features of the ZnSe:Fe2+ samples inherent to this type of excitation.