基于补偿叠层挤压的全固态硫系布拉格光纤  

All Solid-State Chalcogenide Bragg Fiber Based on Compensated-Stacking Extrusion

作　　者：杨克羽 孙伟路 盛俊凯 彭芊芊 白胜闯 戴世勋[1,2] 王训四 Yang Keyu;Sun Weilu;Sheng Junkai;Peng Qianqian;Bai Shengchuang;Dai Shixun;Wang Xunsi(Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technology,Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,Zhejiang,China;Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,Ningbo 315211,Zhejiang,China;Ningbo Institute of Oceanography,Ningbo 315832,Zhejiang,China)

机构地区：[1]宁波大学信息科学与工程学院高等技术研究院红外材料与器件实验室,浙江宁波315211 [2]浙江省光电探测材料及器件重点实验室,浙江宁波315211 [3]宁波海洋研究院,浙江宁波315832

出　　处：《中国激光》2024年第2期136-143,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(U22A2085,62205163,61875097,61935006);浙江省杰出自然科学基金(LY20F050010,LQ21F050005);宁波市自然科学基金(2021J076);宁波市领军拔尖人才培养项目;王宽诚幸福基金。

摘　　要：基于有效全向反射原理的布拉格光纤可以通过调谐周期性的包层结构参数来实现特定波长的高功率传输。为了克服传统空心布拉格光纤易于形变的缺点,制备了一种基于补偿叠层挤压技术的硫系玻璃纤芯全固态布拉格光纤,解决了传统叠层挤压引起的光纤层厚不均匀问题。该光纤含有三对厚度相同的包层对,在整根6 m长光纤中包层对的厚度与光纤直径的比例保持恒定的3∶100。该光纤在4~10μm的波长范围内具有四个明显的低损耗窗口,证明了优化玻璃厚度的补偿叠层技术可以有效改善光纤结构及光传输性能。Objective Bragg fibers have multiple unique optical properties such as photonic bandgap light guides,single-mode transmission over a wide frequency range,dispersion management,and low transmission loss,which make them attractive for broad applications.The transmission ability of a traditional hollow Bragg fiber is restricted by air-core collapse and structured-cladding deformation during optical fiber preparation.Even under tiny fiber cladding deformations,the bandgap can be violently degraded.All solid-state structures have been proven to solve the core collapse and cladding deformation problems of hollow Bragg fibers.Therefore,an urgent requirement exists to develop novel fiber structures and effective fiber fabrication methods to improve fiber transmission capability.In this study,an all-solid Bragg fiber with a chalcogenide glass core is fabricated via a compensated-stacking extrusion technique to address the challenge of hollow-core deformation in traditional Bragg fibers.The fiber consists of three pairs of uniform periodic cladding and low-loss windows in the range of 4‒10μm.This experimental data can assist further study regarding mid-infrared bandgap-controlled fibers and unlock new directions for the development of high-quality laser transmissions or optical sensors in the mid-infrared region.Methods In this study,we first establish a theoretical model for all-solid-state Bragg fibers.Mid-infrared chalcogenide glasses Ge_(20)As_(20)Se_(15)Te_(45) and As_(2)S_(3) are chosen as high-and low-refractive-index cladding materials.The large difference in the refractive index between the alternating-layer materials helps to form the widest photonic bandgap.Two groups of fibers based on equal-or compensated-thickness glass are prepared for comparison.The cross sections,transmission loss values,and near-field energy distributions of these optical fiber types are calculated and analyzed.Results and Discussions According to the simulation results,the optimal structural parameters of all solid-state chalcogenide

关 键 词：光纤光学 全固态 布拉格光纤 硫系玻璃 叠层挤压法 

分 类 号：TN253[电子电信—物理电子学]