量子电子学报2012，Vol.29Issue(3)：303-310,8.DOI:10.3969/j.issn.1007-5461.2012.03.008
少模光纤放大器模式竞争及信噪比的研究
Transverse mode competition and signal to noise ratio in few-mode fiber amplifiers
摘要
Abstract
Transverse mode distribution and dopant profile are introduced in propagation-rate equations. An approximate numerical algorithm by multilayer method is presented to calculate the power of amplified signal and amplified spontaneous emission (ASE) in multimode fiber amplifiers. Numerical results of the propagation-rate equations before and after the improvement are compared. It shows that power filling factor is the key indication to describe the transverse mode competition behavior. Dopant profile makes great effect in mode selection and 60% ~ 70% confinement of flat doping is more helpful in high-order mode suppression. ASE significantly drops and SNR increases when the ions are doped more concentrated in the fiber core.关键词
激光技术/模式竞争/分环法/放大的自发辐射/功率填充因子Key words
laser techniques/ mode competition/ multilayer method/ amplified spontaneous emission/ filling factor分类
信息技术与安全科学引用本文复制引用
刘庆,魏安琨,郑睿,王安廷,许立新,明海..少模光纤放大器模式竞争及信噪比的研究[J].量子电子学报,2012,29(3):303-310,8.基金项目
NSAF联合基金(10876038) （10876038）
