摘要
提出一种红外波段低损耗的空芯反谐振光纤,石英包层管为半圆半椭圆拼接结构,采用全矢量有限元法进行设计与研究。半椭圆管的半短长轴与半圆管的半径相等,将半圆管与半椭圆管进行拼接,改变半圆的半径以及半椭圆管的半长轴来改变靠近纤芯处的负曲率以及远离纤芯的正曲率,进而研究包层管的正负曲率对空芯反谐振光纤的损耗特性的影响,设计应用于1. 5~3. 0μm波段的低损耗空芯反谐振光纤。结果显示负曲率较小正曲率较大时限制损耗效果更好。当靠近纤芯处为圆形半管远离纤芯处为椭圆半管,圆形半径ry=25μm,椭圆的半长轴rx=65μm,半短长轴ry=25μm时,光纤最低限制损耗在波长2. 1μm处为8. 22×10^(-2)dB/km。
A hollow-core anti-resonant fiber is proposed with low confinement loss in infrared band.The cladding tube is a semicircular semi-elliptical splicing structure.The full vector finite element method is used for the simulation.The semi-minor axis of the semi-elliptical tube is equal to the radius of the semicircular tube.A semi-circular tube and a semi-elliptical tube are spliced to form a semi-circular semi-elliptical cladding tube.The negative curvature and the positive curvature are changed by improving the structure parameters of the tube.The purpose of this paper is to study the loss characteristics of the positive and negative curvature of the cladding tube,and to design a low loss hollow core anti-resonant fiber applied in the 1.5~3.0μm band.The results show that the effect of limiting loss is better when the negative curvature decreases and the positive curvature increases.The lowest confinement loss is 8.22×10-2 dB/km at the wavelength of 2.1μm when the semi-circular tube is close to the core and the elliptical tube is far away from the core,as well as the circular radius ry=25μm,the semimajor axis of the ellipse rx=65μm,the semi-minor axis of the ellipse ry=25μm.
作者
韩颖
董婷婷
卿源
宋朋
朱维震
周凡迪
李正然
王伟
侯蓝田
HAN Ying;DONG Ting-Ting;QING Yuan;SONG Peng;ZHU Wei-Zhen;ZHOU Fan-Di;LI Zheng-Ran;WANG Wei;HOU Lan-Tian(The key laboratory for special fiber and fiber sensor of Hebei Province,Institute of information science and technology,Yanshan University,Qinhuangdao 066004,China;School of Physics and Technology,University of Jinan,Jinan 250022,China)
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2020年第1期32-38,共7页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金(61405173,61971373)
河北省自然科学基金(F2019203549,F2019203440)~~
关键词
红外波段
空芯反谐振光纤
负曲率
限制损耗
infrared band
hollow-core anti-resonant fiber
negative curvature
confinement loss
