3μm波段低损耗抗弯曲反谐振空芯光纤设计  

Design of Low Loss Hollow-Core Anti-Resonance Fiber for 3μm Spectral Region

作　　者：张家强 张敏[1] 尹金德[1] 林海枫 闫培光[1] Zhang Jiaqiang;Zhang Min;Yin Jinde;Lin Haifeng;Yan Peiguang(Shenzhen Key Laboratory of Laser Engineering,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China)

机构地区：[1]深圳大学物理与光电工程学院深圳市激光工程重点实验室,广东深圳518060

出　　处：《激光与光电子学进展》2021年第17期371-378,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61775146);广东省自然基金(2016A030310305);深圳市技术攻关项目(JSGG20160429114438)。

摘　　要：为实现低损耗、抗弯曲的中红外激光传输,在3μm波段研究超低损耗空芯嵌套式反谐振无节点光纤,采用有限元法对空芯光纤的结构参数(管厚、包层毛细管外径、纤芯直径和嵌套管外径)进行数值仿真,并在3μm波段实现低至0.52 d B/km的光纤传输损耗。通过对空芯反谐振光纤和空芯嵌套式反谐振无节点光纤的弯曲损耗及泄漏损耗的对比研究,证明空芯嵌套式反谐振无节点光纤相比于空芯反谐振光纤在宽光谱范围内具有更低的传输损耗(损耗比最高可达22.87 d B)、更好的抗弯曲性能(弯曲半径为6.5 cm的损耗小于0.1 d B/m)。In order to achieve low-loss and bending-resistant mid-infrared laser transmission,the ultra-low-loss hollow-core nested anti-resonant nodeless fiber is studied in the 3μm band,and the structural parameters of the hollow-core fiber(tube thickness,outer diameter of cladding capillary,core diameter,and nested tube outer diameter)are used for numerical simulation,and the optical fiber transmission loss as low as 0.52 d B/km is achieved in the 3μm band.By comparing the bending loss and leakage loss of the hollow core anti-resonant fiber and the hollow core nested anti-resonant nodeless fiber,it is prove that the node-less hollow core anti-resonance fiber has lower transmission loss(loss ratio up to 22.87 d B)and better bending resistance(the loss is less than 0.1 d B/m when the bending radius is 6.5 cm)than the hollow core anti-resonance fiber.

关 键 词：光学器件 中红外 反谐振 低损耗 抗弯曲 空芯光纤 

分 类 号：TN253[电子电信—物理电子学] TN248.1