Design of hollow core step-index antiresonant fiber with stepped refractive indices cladding  

作　　者：Botao DENG Chaotan SIMA Hongyu TAN Xiaohang ZHANG Zhenggang LIAN Guoqun CHEN Qianqing YU Jianghe XU Deming LIU 

机构地区：[1]Next Generation Internet Access National Engineering Laboratory,School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China [2]Yangtze Optical Electronics Co.,Ltd.(YOEC),Wuhan 430205,China

出　　处：《Frontiers of Optoelectronics》2021年第4期407-413,共7页光电子前沿（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.62075074);the National Key R&D Program of China(Nos.2018YFF01011800 and 2018YFB2201901).

摘　　要：With the benefits of low latency,wide transmission bandwidth,and large mode field area,hollow-core antiresonant fiber(HC-ARF)has been a research hotspot in the past decade.In this paper,a hollow core step-index antiresonant fiber(HC-SARF),with stepped refractive indices cladding,is proposed and numerically demonstrated with the benefits of loss reduction and bending improvement.Glass-based capil-laries with both high(n=1.45)and low(as low as n=1.36)refractive indices layers are introduced and formatted in the cladding air holes.Using the finite element method to perform numerical analysis of the designed fiber,results show that at the laser wavelengths of 980 and 1064 nm,the confinement loss is favorably reduced by about 6 dB/km compared with the conventional uniform cladding HC-ARF.The bending loss,around 15 cm bending radius of this fiber,is also reduced by 2 dB/km.The cladding air hole radius in this fiber is further investigated to optimize the confinement loss and the mode field diameter with single-mode transmission behavior.This proposed HC-SARF has great potential in optical fiber transmission and high energy delivery.

关 键 词：antiresonant fiber(ARF) stepped refractive indices confinement loss bending loss laser pumping 

分 类 号：TN253[电子电信—物理电子学]