物理学报Issue(8)：085202-1-085202-6,6.DOI:10.7498/aps.63.085202
高功率全光纤结构主振荡功率放大器中模式不稳定现象的实验研究
Exp erimental study on mo de instability in high p ower all-fib er master oscillator p ower amplifer fib er lasers
摘要
Abstract
Mode instability (MI) is an abrupt mode change when the average output power increases above a certain threshold power, which results in degrading beam quality and restricting the enhancement of power output for diffraction-limited high power fiber laser. The experimental study on MI in all-fiberized master oscillator power amplifer (MOPA) is presented in detail for the first time. It is revealed that MI in all-fiberized MOPA results in reducing the slope efficiency. The theoretical threshold power of MI for 20/400 step-index large-mode-area double-cladding Yb-doped fiber is about 1 kW and MI is rooted mainly from the thermal effect.关键词
模式不稳定/光纤放大器/量子亏损/热效应Key words
mode instability/fiber amplifier/quantum defect/thermal effect引用本文复制引用
陶汝茂,周朴,王小林,司磊,刘泽金..高功率全光纤结构主振荡功率放大器中模式不稳定现象的实验研究[J].物理学报,2014,(8):085202-1-085202-6,6.基金项目
国家自然科学基金(批准号:11274386)、国防科技大学优秀研究生创新项目(批准号：B120704)和湖南省研究生科研创新项目(批准号：CX2012B035)资助的课题.@@@@ Project supported by the National Natural Science Foundation of China (Grant No.11274386), the Innovation Foundation for Excellent Graduates in National University of Defense Technology, China (Grant No. B120704), and the Hunan Provincial Innovation Foundation for Postgraduate, China (Grant No. CX2012B035) （批准号:11274386）
