飞秒
包层(金属加工)
材料科学
激光器
拉曼光谱
发光
光学
折射率
制作
光电子学
波导管
物理
复合材料
医学
病理
替代医学
作者
Quanxin Yang,Hongliang Liu,Shan He,Qingyu Tian,Bin Xu,Pengfei Wu
标识
DOI:10.29026/oea.2021.200005
摘要
We report on the fabrication of circular cladding waveguides with cross-section diameters of 60−120 μm in Pr:YAG crystal by applying femtosecond laser inscription. The fabricated waveguides present 2D guidance on the cross-section and fairly low propagation losses. Multiple high-order guiding modes are observed in waveguides with different diameters. Corresponding simulation results reveal the origin of a specific kind of guiding modes. Confocal micro-Raman (μ-Raman) experiments demonstrate the modification effects in femtosecond laser affected areas and ascertain the refractive index induced guiding mechanism. In addition, luminescence emission properties of Pr3+ ions at waveguide volume are well preserved during the femtosecond laser inscription process, which may result in a potential high-power visible waveguide laser.
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