DIRECT MEASUREMENTS OF THE TERMINAL LASER LEVEL LIFETIME IN NEODYMIUM-DOPED CRYSTALS AND GLASSES

被引:43
作者
BIBEAU, C
PAYNE, SA
POWELL, HT
机构
[1] Lawrence Livermore National Laboratory, University of California, Livermore, CA, 94550
关键词
D O I
10.1364/JOSAB.12.001981
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We have measured the terminal level lifetime (tau 11/2) for the 1-mu m neodymium transition in several laser media, using a novel pump (2.41-mu m) and probe (1.06-mu m) technique. This method allows us to populate the (4)I13/2 level directly and subsequently to monitor the terminal level (4)I11/2 population as a function of time by observing the change in integrated fluoresence of the 0.88-mu m emission for each time delay between the pump and the probe pulses. We developed a computer model to analyze the data and determined the upper and lower limits for the tau 11/2 lifetime. The results for some of the materials investigated are 115-225 ps for Nd:Y3Al5O12, 250-450 ps for Nd:LG-750 (phosphate glass), 535-740 ps for Nd:LG-660 (silicate glass), 896-1900 ps for Nd:YAlO3, and 10.5-20 ns for Nd:YLiF4. In addition, we found the lifetimes to be independent of the neodymium doping concentration for the phosphate and silicate glass samples investigated. (C) 1995 Optical Society of America
引用
收藏
页码:1981 / 1992
页数:12
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