强激光与粒子束2025，Vol.37Issue(8)：29-37,9.DOI:10.11884/HPLPB202537.250072
3μm新型超低损耗单模单偏振空芯反谐振光纤的设计
Design of novel ultra-low loss single-mode single-polarization hollow-core anti-resonant fiber at 3μm wavelength
摘要
Abstract
To achieve stable transmission of laser with lower loss,single mode,and single polarization in the mid-infrared band,This paper designs a bend-resistant hollow-core anti-resonant fiber configuration with a double-cladding nested structure.The finite element method is used to optimize the structural parameters,and the transmission characteristics of broadband low-loss single polarization of the fiber are verified through simulation.The confinement loss of this fiber is less than 0.01 dB/km within the wavelength range of 2.9-3.3 μm,and the high-order mode extinction ratio exceeds 1000,and the confinement loss is as low as 0.0014 dB/km at 3 μm wavelength.The symmetry of the fiber structure is destroyed by using different nested tube thicknesses,and the single-polarization characteristic of the fiber is theoretically investigated.Within the wavelength range of 2.996-3.004 μm,the polarization extinction ratio exceeds 10000,demonstrating an extremely stable single polarization effect.In addition,theoretical analysis indicates that this fiber also has excellent bending resistance performance.When the bending radius in the y-direction is greater than 5 cm,it can still ensure single-polarization laser transmission,and the bending loss is less than 3.11 dB/km.The designed hollow-core anti-resonant fiber configuration has great potential for application in mid-infrared fiber laser and other fields.关键词
低损耗/单偏振/单模/中红外波段/空芯反谐振光纤Key words
low loss/single-polarization/single mode/mid-infrared band/hollow-core anti-resonant fiber分类
信息技术与安全科学引用本文复制引用
谢兆鑫,盖浩杰,王学军..3μm新型超低损耗单模单偏振空芯反谐振光纤的设计[J].强激光与粒子束,2025,37(8):29-37,9.基金项目
山西省重点实验室开放基金项目(CICIP2022001) （CICIP2022001）
石家庄铁道大学引进人才科研启动项目(309000900110011) （309000900110011）
