Fiber core mode leakage induced by refractive index variation in high-power fiber laser

• 来源期刊: 中国物理B（英文版）
• 关键词: double-clad fiber laser and amplifier core loss cladding mode mode coupling theory
• 年，卷（期）: 2017,（3）
• 页码范围: 336-343
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/3/034205

摘要

This paper presents an investigation of specific optical fiber core mode leakage behavior that occurs in high-power double-clad fiber lasers as a result of thermally-induced refractive index variations.A model of the power transfer between the core modes and the cladding modes during thermally-induced refractive index variations is established based on the mode coupling theory.The results of numerical simulations based on actual laser parameters are presented.Experimental measurements were also carried out,the results showed good agreement with the corresponding simulation results.