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光纤激光器是当今光电子技术研究领域引起广泛关注的研究课题。双包层光纤激光器的谐振腔一般采用典型的法布里-珀罗腔结构,目前国内普遍采用二向色镜作为前腔镜,利用光纤后端面4%的菲涅耳反射作为后腔镜。这种光纤激光器缺乏有效的选频机制,输出的激光线宽较宽,而且抽运光的耦
Fiber lasers are the research topics that cause widespread concern in the field of optoelectronic technology today. The resonant cavity of double-clad fiber laser generally adopts the typical Fabry-Perot cavity structure. At present, the dichroic mirror is commonly used as a front endoscope in China, and the 4% Fresnel reflection of the rear end of the fiber is used as a back endoscope. This kind of fiber laser lacks an effective frequency selection mechanism, the output laser has a wider linewidth, and the pumping light coupling