Abstract
Due to the wide use of coherent radiation in the mid-infrared (IR) region, the attention has been paid to both direct and indirect methods of generation of this radiation over the past two decades. While indirect methods are based on nonlinear conversion (OPOs or Raman scattering), the direct approach looks for a new active media that will allow generation of radiation in the mid-IR region in a single step [1]. It has been found that by replacing Zn2+ ions with Mn2+, Mg2+ or Cd2+ ions with comparable size in the ZnSe matrix, the position of the absorption and emission bands is shifted to the longer wavelengths by increasing concentration of these ions substitution [1, 2]. It allows a one laser oscillator to extend or to shift the emission spectrum further to the mid-IR part of the electromagnetic spectrum, which was previously exclusively based on the nonlinear processes or on the parametric generation.
© 2019 IEEE
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