Transition metal-doped zinc chalcogenides: spectroscopy and laser demonstration of a new class of gain media
作者： L.D. DeLoach , R.H. Page , G.D. Wilke , S.A. Payne , W.F. Krupke
DOI: 10.1109/3.502365
关键词:
摘要: The absorption and emission properties of transition metal (TM)-doped zinc chalcogenides have been investigated to understand their potential application as room-temperature, mid-infrared tunable laser media. Crystals ZnS, ZnSe, ZnTe, individually doped with Cr/sup 2+/, Co/sup Ni/sup or Fe/sup 2+/ evaluated. are presented discussed in terms the energy levels from which they arise. spectra crystals studied exhibit strong bands between 1.4 2.0 /spl mu/m overlap output strained-layer InGaAs diodes. room-temperature reveal wide-band emissions 2-3 for Cr 2.8-4.0 Co, luminesces strongly at room temperature; Co exhibits significant losses nonradiative decay temperatures above 200 K, Ni Fe only luminesce low temperatures, is estimated highest quantum yield temperature among media values sim/75-100%. Laser demonstrations Cr:ZnS Cr:ZnSe performed a laser-pumped cavity Co:MgF/sub 2/ pump laser. both lasers were determined peak wavelengths near 2.35 mu/m, demonstrated maximum slope efficiency approximately 20%. Based on these initial results, ion predicted be highly favorable mid-IR when into chalcogenides; may also serve usefully, but yet remain performed.
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