光通信研究Issue(2)：110-116,7.DOI:10.13756/j.gtxyj.2025.240038
低损耗螺旋结构高非线性光子晶体光纤设计
Design of High Nonlinear Photonic Crystal Fiber with Low Loss Spiral Structure
摘要
Abstract
[Objective]As a potential important optical device,chalcogenide high nonlinear fiber has a wide application prospect in the mid-infrared region.In order to meet the requirements of optical signal processing and transmission in infrared region,a chal-cogenide high nonlinear fiber is proposed to improve the efficiency and performance of optical signal processing in the infrared re-gion.[Methods]Using the finite element method as a design and analysis tool,combined with the selection of highly nonlinear materials and the optimization of fiber structure parameters,the fiber design with efficient nonlinear effects in the mid-infrared re-gion is realized.The confinement loss,dispersion and nonlinear coefficient of the highly nonlinear Photonic Crystal Fiber(PCF)with spiral structure of As2Se3 material in the wavelength range of 1～7 μm are analyzed and optimized.[Results]The results show that the confinement loss can be as low as 10-8 orders of magnitude at the wavelength range of no more than 6.25 μm.It has dispersion flattening characteristics at the mid-infrared region range of 2～5 μm.There are multiple zero dispersion points in the range of 1～7 μm,and the nonlinear coefficient can be as high as 248 630 W-1·km-1.[Conclusion]The fiber can realize ultra-wideband low loss dispersion flatness and high nonlinearity in the mid-infrared region,and has potential application prospects in the field of mid-infrared optical communication and optical sensing.关键词
光纤光学/光子晶体光纤/非线性/色散/中红外波段Key words
fiber optics/PCF/nonlinearity/dispersion/mid-infrared region分类
信息技术与安全科学引用本文复制引用
田治军,董洁,侯尚林,雷景丽,武刚,晏祖勇..低损耗螺旋结构高非线性光子晶体光纤设计[J].光通信研究,2025,(2):110-116,7.基金项目
国家自然科学基金资助项目(61665005) （61665005）
