光学
多模光纤
梁(结构)
物理
光纤
放大器
光放大器
折射率
折射率分布
光束
激光束质量
光电子学
激光束
激光器
CMOS芯片
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-12-02
卷期号:48 (2): 259-259
被引量:4
摘要
Doped and optically pumped graded-index (GRIN) fibers can be used to amplify an optical beam such that its spatial quality is improved at the output end of the fiber compared with that of the unamplified beam. We develop a simple model of the amplification process in such GRIN fiber amplifiers and show that the resulting equations can be solved analytically with suitable approximations. The solution shows that the width of the amplifying beam oscillates but also becomes narrower because of the radial dependence of the optical gain. The main advantage of our simplified approach is that it provides an analytic expression for the damping distance of beam-width oscillations that shows clearly the role played by various physical parameters.
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