基于外部气相沉积的S+C+L波段低色散斜率大有效面积非零色散位移光纤的设计与制备  

Design and Fabrication of a Non-zero Dispersion Shifted Fiber with Low Dispersion Slope in S+C+L Band and Large Effective Area Based on Outside Vapor Deposition

作　　者：查健江 王元达 何学荣 侯伟 王敬胜 文建湘[2] ZHA Jianjiang;WANG Yuanda;HE Xuerong;HOU Wei;WANG Jingsheng;WEN Jianxiang(Shandong Futong Optelecom Science&Technology Co.,Ltd.,Jinan 250119,China;Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication,Shanghai University,Shanghai 200444,China)

机构地区：[1]山东富通光导科技有限公司,济南250119 [2]上海大学特种光纤与光接入网省部共建国家重点实验室培育基地/特种光纤与先进通信国际合作联合实验室,上海200444

出　　处：《光子学报》2024年第2期52-63,共12页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61935002,61635006)。

摘　　要：针对现有光纤无法满足宽带光密集波分复用系统传输和S+C+L波段粗波分复用的要求,设计了一种具有中心凹陷的三角形芯+环形的折射率剖面,利用外部气相沉积工艺制备了一种非零色散位移光纤,并通过调整第一芯层的相对折射率和第二芯层与第一芯层的半径比,探究了其对光纤衰减、色散斜率和有效面积等参数的影响。研究发现,当第一芯层的相对折射率逐渐增大且第二芯层与第一芯层半径比逐渐减小时,零色散波长和有效面积逐渐减小。当第一芯层的相对折射率在0.52%~0.53%,芯层半径比在2.6~2.7时,光纤的有效面积接近70μm^(2),零色散波长在1420 nm附近,在1550 nm波段的色散系数大于8 ps·nm^(-1)·km^(-1),色散斜率为0.059 ps·nm^(-2)·km^(-1),可以较好地抑制传输过程中光非线性效应,满足长途干线网与城域网的使用要求。Existing optical fibers struggle to support broadband dense wavelength division multiplexing and coarse wavelength division multiplexing transmissions,necessitating the development of optimized fibers with moderate dispersion,low dispersion slope,enlarged effective area,and low attenuation.Currently,None Zero Dispersion Shifted Fiber(NZDSF)fibers have a small effective area incompatible with conventional fibers,emphasizing the need for precise design control of the refractive index profile.Therefore,creating a S+C+L band NZDSF with a large effective area and low slope is crucial for meeting the escalating demand for bulk data transmission.The dispersion slope,a crucial parameter in optics,is determined by the interplay between waveguide and material properties.The effective area,a metric that signifies the fiber's optical performance,relies heavily on the refractive index profile and the chosen input wavelength.In order to find the appropriate dispersion slope and effective area,we need to find a suitable refractive index profile.In our research,we have employed a refined profile structure modal,featuring a triangular+ring core configuration embellished by a central depression and fabricated by a two-step process to prepare the core and cladding by using the Outside Vapor Deposition(OVD).Through experiments,adjustments were made to the doping levels in the core,thereby modifying the relative refractive indexΔn1 and radius R1 of the first core layer.This enabled the formation of a triangular cross-sectional structure.Simultaneously,the relative refractive indexΔn3 and thickness R3-R2 of the third core layer were also adjusted,resulting in distinct refractive index waveguide configurations.This approach strucks a balance between achieving low attenuation,a large effective area,a reduced dispersion slope,and an appropriate zero dispersion wavelength.After optimizing the preform preparation and drawing process,the optical fiber cross-section obtained has a high matching with the designed cross-section.The triangula

关 键 词：光纤通信 非零色散位移光纤 外部气相沉积工艺 S+C+L波段 低色散斜率 大有效面积 波分复用 

分 类 号：O436[机械工程—光学工程]