强激光与粒子束, 2009, 21 (8): 1148, 网络出版: 2009-12-02
后向泵浦高功率掺镱光纤放大器的非弹性散射效应
Inelastic scatterings in high-power back-pumped ytterbium-doped double-clad fiber amplifiers
掺镱光纤放大器 后向泵浦 受激布里渊散射 受激喇曼散射 高功率 ytterbium-doped fiber amplifier backward pump stimulated Brillouin scattering stimulated Raman scattering high power
摘要
在考虑受激布里渊散射和受激喇曼散射效应的基础上,数值求解了双包层掺镱光纤放大器的速率-传输方程,分析了后向泵浦高功率掺镱光纤放大器在不同信号光线宽、光纤长度和纤芯直径下的输出特性,研究了受激布里渊散射和受激喇曼散射的抑制条件。计算结果表明:在后向泵浦方式下,若掺镱光纤长度小于0.68 m,纤芯直径大于26 μm,信号光线宽大于0.04 nm,则放大过程中的受激布里渊散射和受激喇曼散射能同时得到有效抑制。
Abstract
Based on the numerical modeling including stimulated Brillouin scattering and stimulated Raman scattering,the propagation-rate equations of ytterbium-doped double-clad fiber amplifiers are solved.The output characteristics of the high-power backward-pumped ytterbium-doped double-clad fiber amplifiers are studied at different signal linewidths,fiber lengths and fiber-core diameters.The methods of suppressing the stimulated Brillouin scattering and stimulated Raman scattering are also investigated.Calculated results show that the two scatterings can be suppressed simultaneously by using an ytterbium-doped fiber with the length shorter than 0.68 m and the fiber-core diameter larger than 26 μm,or broadening the signal linewidth to more than 0.04 nm.
冯杰, 周晓军, 张旨遥, 秦祖军, 刘永. 后向泵浦高功率掺镱光纤放大器的非弹性散射效应[J]. 强激光与粒子束, 2009, 21(8): 1148. Feng Jie, Zhou Xiaojun, Zhang Zhiyao, Qin Zujun, Liu Yong. Inelastic scatterings in high-power back-pumped ytterbium-doped double-clad fiber amplifiers[J]. High Power Laser and Particle Beams, 2009, 21(8): 1148.
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