Re-absorption and nonradiative energy transfer in vibronic laser gain media

被引：6

作者：

Evans, Jonathan W. ^{[1
]}

Harris, Thomas R. ^{[1
,2
]}

Turner, Eric J. ^{[1
,3
]}

Kimani, Martin M. ^{[1
,3
]}

Mann, J. Matthew ^{[1
]}

Stites, Ronald W. ^{[1
]}

Cook, Gary ^{[1
]}

Schepler, Kenneth L. ^{[4
]}

机构：

[1] Sensors Directorate, Air Force Res Lab, Wright Patterson AFB, OH 45433 USA

[2] Azimuth Corp, Fairborn, OH USA

[3] KBRwyle Aerosp Grp, Ridgecrest, CA USA

[4] Univ Cent Florida, CREOL, Orlando, FL 32816 USA

来源：

OPTICAL ENGINEERING | 2021年 / 60卷 / 05期

关键词：

mid-infrared lasers; transition metals; vibronic lasers; spectroscopy; rate equations; FE-ZNSE; SPECTROSCOPY; TEMPERATURE; IONS;

D O I：

10.1117/1.OE.60.5.056103

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Fe:ZnSe and other transition metals have broad upper and lower energy manifolds that give rise to broad absorption and fluorescence bands in the mid-infrared spectral region. Energy transfer between Fe2+ ions via re-absorption of fluorescence (due to the spectral overlap of these bands) and phonon-assisted energy transfer (due to the lattice dynamics of ZnSe) becomes more probable with increasing Fe2+ concentration. Here, we treat these processes as additional terms in the rate equations that govern the spontaneous decay of the Fe2+ ion. This treatment gives insight into anomalous behavior seen in the thermal lifetime of the Fe:ZnSe system. We also apply the model to other transition metal-doped II-VI materials. (c) The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License.

引用

页数：21

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