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

Jonathan W. Evans; Thomas R. Harris; Eric J. Turner; Martin M. Kimani; J. Matthew Mann; Ronald W. Stites; Gary Cook; Kenneth L. Schepler

doi:10.1117/12.2290822

15 February 2018 Re-absorption and nonradiative energy transfer in vibronic laser gain media

Jonathan W. Evans, Thomas R. Harris, Eric J. Turner, Martin M. Kimani, J. Matthew Mann, Ronald W. Stites, Gary Cook, Kenneth L. Schepler

Author Affiliations +

Proceedings Volume 10511, Solid State Lasers XXVII: Technology and Devices; 105110I (2018) https://doi.org/10.1117/12.2290822
Event: SPIE LASE, 2018, San Francisco, California, United States

Abstract

Fe:ZnSe and other transition metals have broad upper and lower energy manifolds which give rise to broad absorption and fluorescence bands in the mid-IR 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 which 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.

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Citation Download Citation

Jonathan W. Evans, Thomas R. Harris, Eric J. Turner, Martin M. Kimani, J. Matthew Mann, Ronald W. Stites, Gary Cook, and Kenneth L. Schepler "Re-absorption and nonradiative energy transfer in vibronic laser gain media", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105110I (15 February 2018); https://doi.org/10.1117/12.2290822

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