Resonant pumping and upconversion in 1.6 μm Er3+ lasers

被引:36
作者
White, Jeffrey O.
Dubinskii, Mark
Merkle, Larry D.
Kudryashov, Igor
Garbuzov, Dmitri
机构
[1] Army Res Lab, Adelphi, MD 20783 USA
[2] Princeton Lightwave Inc, Cranbury, NJ 08512 USA
关键词
D O I
10.1364/JOSAB.24.002454
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A four-level, plane wave model is proposed for a resonantly pumped 1.6 mu m Er3+ laser, including the effect of upconversion. A mean population approximation leads to analytical expressions for the threshold and slope efficiency that are highly accurate compared to the numerical solution. Using the beam area as an adjustable parameter, the threshold and slope efficiency agree well with data obtained using a 1% Er:YAG crystal, pumped at 1470 nm, lasing at 1617 nm, in the range 0-100 degrees C. According to the model for this laser, the slope efficiency versus absorbed pump power is unaffected by upconversion, but the threshold is increased by a factor of 2-3. The results are important for choosing the optimum doping level and fiber or rod length. (C) 2007 Optical Society of America.
引用
收藏
页码:2454 / 2460
页数:7
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