Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 27, Issue 5, Pages 975-980Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.27.000975
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Funding
- National Natural Science Foundation of China (NNSFC) [60878043, 60707019, 50911140475]
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Tm3+/Ho3+ codoped lanthanum aluminum germanate glasses are prepared by a simple melt-quenching method. The 2 mu m emission characteristic and energy transfer from Tm3+ to Ho3+ upon excitation of a conventional 808 nm laser diode is investigated. The spectroscopic properties are estimated by using Judd-Ofelt parameters, branching ratios, and lifetimes. The microscopic energy transfer parameters of each process are also calculated. The large energy transfer coefficient of Tm3+ to Ho3+ and the little back energy transfer from Ho3+ to Tm3+ indicate that an efficient energy transfer process occurs. (C) 2010 Optical Society of America
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