17 February 2010 Enhanced 5-µm emission in Tm,Tb: KPb2Br5 and Tm,Nd:KPb2Br5 for mid-infrared laser applications
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Abstract
We report on the 5 μm emission characteristics and energy transfer properties of Tb3+ doped KPb2Br5 and Nd3+ doped KPb2Br5 sensitized by Tm3+ ions. A series of co-doped samples of Tm,Tb: KPb2Br5 and Tm,Nd: KPb2Br5 samples were prepared from purified starting materials of PbBr2, KBr, and rare earth halides. Resonant excitation into the 3H63F4 absorption transition of Tm3+ at ~1760 nm resulted in an enhanced 5 μm emission from Tb3+ and Nd3+ ions in Tm,Tb: KPb2Br5 and Tm,Nd: KPb2Br5, respectively. The existence of energy transfer between Tm → Tb and Tm → Nd was further evidenced by the quenching of the emission decay times of the 3F43H6 transition of Tm3+ in doubly doped Tm,Tb: KPb2Br5 and Tm,Nd: KPb2Br5 compared to singly doped Tm: KPb2Br5.
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A. G. Bluiett, D. Peele, K. Norman, E. Brown, U. Hommerich, S. B. Trivedi, J. M. Zavada, "Enhanced 5-µm emission in Tm,Tb: KPb2Br5 and Tm,Nd:KPb2Br5 for mid-infrared laser applications", Proc. SPIE 7578, Solid State Lasers XIX: Technology and Devices, 75782I (17 February 2010); doi: 10.1117/12.842188; https://doi.org/10.1117/12.842188
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