Power-law dependence of the photodarkening rate constant on the inversion in Yb doped fibers

被引：71
作者：
Jetschke, Sylvia [1 ]
Roepke, Ulrich [1 ]
机构：
[1] Inst Photon Technol IPHT, D-07745 Jena, Germany
来源：
OPTICS LETTERS | 2009年 / 34卷 / 01期
关键词：
SILICA FIBERS;
D O I：
10.1364/OL.34.000109
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The description of the photodarkening (PD) kinetics of Yb-doped silica fibers with a stretched exponential function is analyzed in more detail, revealing a dependence of the determined PD parameter values on the measurement time. Thereby, serious uncertainties may occur in advanced interpretations of the results, e.g., the discussion of the rate constant as a function of the Yb inversion, if the measurement time is too short. A method to circumvent the problems of the fitting procedure is suggested, taking advantage of the self-similarity of the PD curves for different inversions. An exponent of 4.3 +/- 0.5 in the power-law dependence of the PD rate constant tau(-1) on the Yb inversion was found for a typical aluminium-codoped fiber. (c) 2008 Optical Society of America OCIS codes: 060.2270, 160.2290, 160.5690.
引用
收藏
页码：109 / 111
页数：3
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