Evolution of modes in double-clad Raman fiber amplifier  

作　　者：王文亮 黄良金 冷进勇 郭少锋 姜宗福 

机构地区：[1]College of Optoelectric Science and Engineering,National University of Defense Technology

出　　处：《Chinese Physics B》2014年第2期307-311,共5页中国物理B（英文版）

摘　　要：Stimulated Raman scattering in a double cladding optical fiber is studied with a continuous wave laser used as a pump source. Under various launch conditions, pump modes are differently excited. Considering the mode coupling effect among the pump modes, the evolution of the power in the Stokes modes is studied. The results show that the scattered waves （the Stokes waves） in the fiber core with 9%tm diameter and 0.14 NA could propagate predominantly in the fundamental mode of the fiber by carefully adjusting the pump light launching conditions.Stimulated Raman scattering in a double cladding optical fiber is studied with a continuous wave laser used as a pump source. Under various launch conditions, pump modes are differently excited. Considering the mode coupling effect among the pump modes, the evolution of the power in the Stokes modes is studied. The results show that the scattered waves （the Stokes waves） in the fiber core with 9%tm diameter and 0.14 NA could propagate predominantly in the fundamental mode of the fiber by carefully adjusting the pump light launching conditions.

关 键 词：fiber nonlinear optics high power Raman fiber amplifier fiber mode 

分 类 号：TN722[电子电信—电路与系统] TN248