不稳定性
光纤激光器
横截面
光学
物理
模式(计算机接口)
激光器
材料科学
机械
计算机科学
工程类
结构工程
操作系统
作者
Liang Dong,M.N. Zervas
摘要
A first theoretical study of Transverse Mode Instability (TMI) in oscillators based on a Stimulated Thermal Rayleigh Scattering (STRS) model is conducted. Higher Order Mode (HOM) lasing is found to happen at high powers. Further Fundamental Mode (FM) growth is limited once HOM lasing takes place, with further increase of pump power mostly going to HOM growth, a fundamentally different phenomenon from that in fiber amplifiers. TMI thresholds defined as when the HOM lasing condition is met is studied. The results are consistent with the measured TMI thresholds and their dependence on pumping configurations and pump wavelengths.
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