Photodarkening-Induced Absorption and Fluorescence Changes in Yb Fibers  

作　　者：CHEN Gui XIE Lu WANG Yi-Bo ZHAO Nan LI Hai-Qing JIANG Zuo-Wen PENG Jing-Gang YANG Lü-Yun DAI Neng-Li LI Jin-Yan 陈瑰;谢璐;王一礴;赵楠;李海清;蒋作文;彭景刚;杨旅云;戴能利;李进延(Wuhan National Laboratory for Optoeletronics,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]Wuhan National Laboratory for Optoeletronics,Huazhong University of Science and Technology,Wuhan 430074

出　　处：《Chinese Physics Letters》2013年第10期116-119,共4页中国物理快报（英文版）

基　　金：Supported by the National High-Technology Research and Development Program of China under Grant Nos 2013AA031501 and 2011AA030201.

摘　　要：We study the photodarkening effect in a double clad ytterbium-doped silica fiber fabricated by modified chemical vapor deposition and solution doping.A common measurement technology for photodarkening is used to study the photodarkening-induced absorption spectra.We present a fast and simple method to observe the PD effect by measurement of the fluorescence spectra.The method proposed here can be used to observe the influence for a short time,and thus reduces the requirements of system stability and heat management.It is obtained that under the condition of 45.5%Yb ion inversion level,photodarkening-induced excessive loss at an equilibrium state is above 4.5 dB/m and florescence intensity degradation is above 10%after 500 min pumping at 1041 nm for the home-made normal Yb/Al co-doped silica fiber.

关 键 词：SPECTRA PUMPING fiber 

分 类 号：TN2[电子电信—物理电子学]