Measurement of excited‐state‐absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare‐earth lasers
Measurement of excited‐state‐absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare‐earth lasers
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DOI：
10.1063/1.90395
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发表时间：
1978-09
影响因子：
4
通讯作者：
R. Jacobs;W. Krupke;M. Weber
中科院分区：
文献类型：
--
作者：
R. Jacobs;W. Krupke;M. Weber
Ce~(3+)的宽带5d→~4f跃迁被认为是一种可调谐激光作用。本文对Y3Al5O12中Ce3+离子激发态的光学探针测量表明，在295K时，由于激发态吸收，550-610 nm区域的受激发射是不可能的。瞬时测量表明，这种损耗的一部分具有≈75 ns的寿命，并且与最低5d能级的吸收有关；还观察到了较长寿命的损耗。温度越低，激发态吸收损耗越小。
Broad bandwidth 5d→4f transitions in Ce3+ have been considered for tunable laser action. In this letter, optical probe measurements of excited Ce3+ ions in Y3Al5O12 show that stimulated emission in the 550–610‐nm region is not possible at 295 K because of excited‐state absorption. Transient measurements demonstrate that part of this loss has ≈75‐ns lifetime and is associated with absorption from the lowest 5d level; a longer‐lifetime loss is also observed. The excited‐state‐absorption loss is reduced at lower temperatures.