C+L波段0.38 dB/km超低损耗国产嵌套管式空芯反谐振光纤  

Homemade Nested Hollow-Core Anti-Resonant Fiber with 0.38 dB/km Ultralow Attenuation in C and L Bands

作　　者：张鑫[1] 董子涵 姚静远 万双琴 王璞[1] Zhang Xin;Dong Zihan;Yao Jingyuan;Wan Shuangqin;Wang Pu(Institute of Laser Engineering,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部激光工程研究院,北京100124

出　　处：《中国激光》2022年第11期220-224,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(62035002)。

摘　　要：为了进一步降低空芯反谐振光纤在通信波段的传输损耗,利用改良的堆积-拉制法成功制备出在通信C+L波段具有超低损耗的嵌套管式空芯反谐振光纤(Nested HC-ARF)。光纤制备长度为720 m,在1545~1660 nm光谱范围内实现了0.38 dB/km的平均传输损耗,同时光纤LP模式损耗高达2.96 dB/m,光纤高阶模抑制比为38.9 dB。测量结果表明,制备的Nested HC-ARF具有与实芯单模光纤同一量级的超低传输损耗以及极高的光纤模式纯度,有望作为新一代传输光缆应用于光纤通信系统。Objective Since the first observation of light guidance in a hollow-core optical fiber(HCF)in 1999,the development of the HCF has attracted much attention in the last two decades.The presence of the microstructure in the cladding allows the HCF to confine most of the light energy in the hollow core of the fiber.This makes it possible to break the limitations of conventional solid-state fibers with the benefits of low nonlinear effects,high damage thresholds,low transmission losses,low latency,etc.Especially,the breakthrough results in dramatic loss reduction achieved by a hollow-core anti-resonant fiber(HC-ARF)make this kind of fiber become one of the most remarkable and promising fiber types nowadays.In the present study,a 5-tube nested hollow-core anti-resonant fiber(Nested HC-ARF)is investigated,which exhibits outstanding optical performances in terms of 0.38 dB/km attenuation at around 1550 nm and excellent modal purity.Methods The Nested HC-ARF is fabricated using the modified stack-and-draw method,in which the 5nested capillaries are first stacked and fused inside a jacket tube and then drawn to the intermediate canes.Subsequently these canes are scaled down to fiber dimensions using a conventional cane-in-tube process.The thickness of the inner and outer tubes is carefully controlled by holding the differential pressure to satisfy the anti-resonance conditions at the designed operational wavelength.Finally the uncontrolled distortions are maximally suppressed by drawing the fiber under a relatively low furnace temperature and very high drawing tension.Results and Discussions The fundamental transmission band of the fabricated Nested HC-ARF starts at around1265nm and extends beyond 1700nm.The average attenuation value of 0.38dB/km is achieved from 1545nm to1660nm,which covers the optical telecommunication C and L bands.The uncertainty shown by the grayed region arises from cleave-to-cleave variability.Loss peaks appearing in the short wavelength edge of the transmission band from 1340nm to 1500nm can be att

关 键 词：光纤光学 光纤元件 空芯反谐振光纤 超低传输损耗 单模 

分 类 号：TN253[电子电信—物理电子学]