Publications by authors named "Nazar O Kovalenko"
Article Synopsis
- Two mid-infrared solid-state crystalline laser media, Cr2+, Fe2+:Zn1-xMnxSe and Cr2+, Fe2+:Zn1-xMgxSe, were studied at cryogenic temperatures with various excitation wavelengths.
- The study focused on how temperature affects the spectral and laser characteristics, exploring direct and indirect excitation mechanisms primarily involving Cr2+ and Fe2+ ions.
- Results suggest the potential for creating new mid-IR laser systems using these materials, targeting wavelengths between 2.3-2.5 and 4.4-4.9 μm.
Millisecond-pulse laser operation of Fe ions at 78 K is demonstrated in the ZnMnSe:Fe,Cr (x=0.3) crystal under a Tm fiber 1940 nm laser pumping through a Cr→Fe energy transfer process for the first time, to the best of our knowledge. The laser slope efficiency was 1% with respect to absorbed pumping energy at 1940 nm.
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