Polarization-maintaining hollow core negative curvature fiber with an operating wavelength of 2.94μm
投稿时间:2020-05-12  修订日期:2020-06-22  download
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作者单位E-mail
韩颖 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室 hanyingysu@163.com 
李正然 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室 18716020067@163.com 
朱维震 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
宋朋 济南大学 物理科学与技术学院  
周凡迪 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
杨骐豪 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
王彦 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
龚琳 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
杨慢 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
王伟 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
侯蓝田 燕山大学 信息科学与工程学院 河北省特种光纤与光纤传感重点实验室  
Abstract:A polarization-maintaining hollow-core negative curvature fiber is proposed, which can be used to transmit mid-infrared laser with an operating wavelength of 2.94μm. By adjusting the thickness of the cladding tube in the y-direction and the maximum distance from the nested tube to the inner diameter of the cladding tube, the polarization mode in the y-direction is weakly coupled with the surface mode of the cladding tube. By optimizing the core diameter and the outer diameter of the cladding tube, the y-direction polarization mode is strongly coupled with the cladding tube surface mode, causing the y-direction polarization mode to leak out of the core. The gap between the cladding tubes guides the high-order mode to leak out of the core, while the x-direction polarization mode keeps the low confinement loss due to the coupling suppression effect of the thickness of the cladding tube and the nested tube. Finally, a polarization-maintaining hollow core negative curvature fiber with an operating wavelength of 2.94μm is obtained. The confinement loss of the x-direction polarization mode is 2.8×10-2dB/m, the polarization extinction ratio is greater than 2×103, the high-order mode rejection ratio is greater than 100, and the birefringence is 1.4×10-5. When bending in the y direction with a radius of 25 cm, the bend loss is 0.62 dB/m.
keywords:Mid-infrared laser  hollow core  polarization maintaining  negative curvature fiber
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Copyright:《Journal of Infrared And Millimeter Waves》