Enhanced absorption by stimulated emission in three excited states ofEr3+in yttrium aluminum garnet
作者:
Yoshinobu Maeda,
Masatoshi Migitaka,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 1
页码: 4-6
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.119302
出版商: AIP
数据来源: AIP
摘要:
Using a laser diode modulated at 250 and 500 MHz, dependence of enhanced absorption on both sample length and temperature was investigated in an erbium doped yttrium aluminum garnet crystal. The transmitted laser intensity decreased with a decay time of 300 ps for sample lengths greater than 3.0 mm and temperatures higher than 50 K when the incident laser intensity increased. In addition, an emission peak was observed near 835 nm corresponding to the transition from the4S3/2level to the4I13/2inEr3+.It was suggested that the enhanced absorption was caused by stimulated emission in three excited states. ©1997 American Institute of Physics.
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