摘要
从掺Yb3+光纤放大器(YDFA)的功率传输方程出发,采用有限差分法对掺Yb3+双包层光纤放大器在1053nm的脉冲放大特性进行数值分析。模拟计算了在977nm前向抽运下,光纤放大器中的上能级粒子数,抽运光和放大自发辐射(ASE)在光纤中的稳态分布。分析了掺Yb3+双包层光纤放大器的单脉冲波形畸变以及控制输入脉冲形状来产生需要的超高斯输出脉冲形状。讨论了最佳长度以及抽运方式差别等问题。
From the propagation equations of Yb^3＋ -doped fiber amplifiers, the characteristics of Yb^3＋ -doped doubleclad fiber amplifier for 1053 nm pulse amplification are comprehensively analyzed through finite-difference method based on numerical modeling. The steady distributions in the fiber of the upper-level population, pump power, and amplified spontaneous emission with 977 nm forward pumping are calculated. The single pulse waveform distortion after amplification is analyzed. Modeling attains a special input waveform which can deduces the super-Gauss type output after pulse amplification. The most suitable fiber length and the impacts of forward pumping and backward pumping are also discussed。
出处
《中国激光》
EI
CAS
CSCD
北大核心
2005年第8期1022-1026,共5页
Chinese Journal of Lasers
基金
国家863计划804课题(2003AA845061)资助项目。
