Radiation from Concave Optical Fiber Tips Fabricated by Laser Induced Photothermal Effects
Radiation from Concave Optical Fiber Tips Fabricated by Laser Induced Photothermal Effects
复制标题
激光诱导光热效应制造的凹面光纤尖端的辐射
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Kyoungsik Yu
中科院分区：
文献类型：
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作者：
Gyeongho Son;Kyoungsik Yu
我们提出一种在光纤端面制造凹面的简单方法。光纤尖端蚀刻表面曲率的半径可通过引导激光束产生的光热效应来控制。自对准凹面是通过在切割后的光纤端面处的与温度相关的湿法蚀刻工艺形成的。通过使用光束轮廓仪测量自由空间光束辐射发散轮廓来验证所制造的凹面形状，其与蚀刻过程中所施加的光功率显示出良好的相关性。
We present a simple method to fabricate concave surface at the optical fiber's end facet. Radii of etched surface curvature at the fiber tips can be controlled by the derived photothermal effects from a guided laser beam. The self-aligned concave surfaces are created by the temperature-dependent wet etching process at the end of the cleaved fiber facet. The fabricated concave shapes were verified by measuring the freespace optical beam radiation divergence profiles using a beam profiler, which show good correlation with the applied optical power during the etching process.