5层空气孔单实芯纯石英光子晶体光纤仿真
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摘要
为研究5层空气孔单实芯纯石英PCF特性,建立了截面空气孔为5层正六边形结构的光子晶体光纤模型,分析基模与包层模的模场分布,利用5层空气孔单实芯纯石英PCF进行仿真研究,并对有效折射率、有效模场面积、非线性特性、色散特性进行了仿真与分析。研究表明,5层空气孔结构的PCF,可以减小有效模场面积和增大非线性系数;在1 500～1 600 nm的波长范围内,随着波长增加,模场变大,相对于二阶模,基模的有效折射率更加稳定;单实芯纯石英PCF的基模与二阶模的波导色散系数也会随着波长的增加有微小的增加,但整体来看色散较为平坦,不会造成波形的明显变化,有利于信号的传输;而在同一波长下,基模的色散系数小于二阶模的色散系数,这主要是由于基模具有更加稳定的有效折射率,对光波在纤芯的束缚力较强。根据对5层空气孔单实芯纯石英PCF的仿真特性研究,为进一步进行光子晶体光纤实验研究提供了一定参考。
In this paper, a photonic crystal fiber(PCF) model with a five-layer regular hexagonal structure with a cross-sectional air hole was established to study the single-solid pure quartz PCF characteristics of a five-layer air hole. The mode field of the fundamental mode and the cladding mode was analyzed. The distribution was simulated by a five-layer air hole single solid pure quartz PCF. The effective refractive index, effective mode field area, nonlinear characteristics and dispersion characteristics were simulated and analyzed. The results show that the introduction of PCF which with five layer air orifice structure allows smaller effective mode field areas and increased nonlinearity. And the mode field increases with the increase of 1 500～1 600 nm wavelength, the effective refractive index of the base mode is more stable than that of the second order mode. The waveguide dispersion coefficients of the fundamental mode and the second mode of the pure quartz PCF with single core also increase slightly with the increase of the wavelength, but the dispersion is relatively flat on the whole, which will not cause the obvious change of the waveform, which is beneficial to the transmission of the signal. At the same wavelength, the dispersion coefficient of the base mode is smaller than that of the second-order mode, which is mainly due to the more stable effective refractive index of the base mold and the stronger binding force to the light wave in the core. The simulation characteristics of single-core pure quartz PCF for five-layer air holes provides a reference for further experimental research on photonic crystal fibers.
In this paper, a photonic crystal fiber(PCF) model with a five-layer regular hexagonal structure with a cross-sectional air hole was established to study the single-solid pure quartz PCF characteristics of a five-layer air hole. The mode field of the fundamental mode and the cladding mode was analyzed. The distribution was simulated by a five-layer air hole single solid pure quartz PCF. The effective refractive index, effective mode field area, nonlinear characteristics and dispersion characteristics were simulated and analyzed. The results show that the introduction of PCF which with five layer air orifice structure allows smaller effective mode field areas and increased nonlinearity. And the mode field increases with the increase of 1 500～1 600 nm wavelength, the effective refractive index of the base mode is more stable than that of the second order mode. The waveguide dispersion coefficients of the fundamental mode and the second mode of the pure quartz PCF with single core also increase slightly with the increase of the wavelength, but the dispersion is relatively flat on the whole, which will not cause the obvious change of the waveform, which is beneficial to the transmission of the signal. At the same wavelength, the dispersion coefficient of the base mode is smaller than that of the second-order mode, which is mainly due to the more stable effective refractive index of the base mold and the stronger binding force to the light wave in the core. The simulation characteristics of single-core pure quartz PCF for five-layer air holes provides a reference for further experimental research on photonic crystal fibers.
引文
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[11]曾春香,廖昆,廖健飞.椭圆空气孔缺陷光子晶体光纤基模的特性分析[J].赣南师范大学学报,2018,39(3):36-40.
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[15]HU X W,PENG J G,YANG L Y,et al.Design and fabrication of a heterostructured cladding solid-core photonic bandgap fiber for construction of Mach-Zehnder interferometer and high sensitive curvature sensor[J].Optics Express,2018,26(6):7005-7012.
[16]LIU Y H,ZHANG F F,ZHAO N,et al.Single transverse mode laser in a center-sunken and cladding-trenched Yb-doped fiber[J].Optics Express,2018,26(3):3421-3426.
[ 2 ]李建华,于怀勇,雷明,等.谐振式光子晶体光纤陀螺环路建模与仿真[J].导航定位与授时,2015,2(5):58-62.
[ 3 ]顾达,施伟华.新型THz微结构传输光纤的仿真设计[J].计算机技术与发展,2015,25(2):230-233.
[ 4 ]李彦,王旭,徐小斌,等.空芯带隙型光子晶体光纤残余双折射特性研究[J].半导体光电,2016,37(2):207-212.
[ 5 ]杨汉瑞,尚思飞,孟杰,等.一种风扇型包层结构的大模场光子晶体光纤[J].化工自动化及仪表,2016,43(2):187-190.
[ 6 ]雷刚.光子晶体光纤双折射度及限制损耗特性研究[J].现代工业经济和信息化,2017,7(22):18-21.
[ 7 ]冯迪,赵正琪,房启蒙,等.基于FEM的单颗磨粒切削光子晶体光纤端面仿真研究[J].半导体光电,2017,38(4):526-530,535.
[ 8 ]张学典,聂富坤,逯兴莲,等.基于正四边形晶格的微结构光子晶体光纤的特性分析[J].光学仪器,2017,39(4):18-24.
[ 9 ]杨勋恩,黄勇林,任珂,等.基于光子晶体光纤的MZI温度传感特性研究[J].光通信研究,2017(3):24-28.
[10]宋凝芳,胡雪妍,徐小斌,等.实芯保偏光子晶体光纤散射测量与分析[J].激光与光电子学进展,2019,56(1):64-68.
[11]曾春香,廖昆,廖健飞.椭圆空气孔缺陷光子晶体光纤基模的特性分析[J].赣南师范大学学报,2018,39(3):36-40.
[12]荣耕辉,伊小素.一种新型高双折射光子晶体光纤的特性研究[J].半导体光电,2018,39(2):211-215.
[13]李天琦,房巨强,雷健,等.棒状光子晶体光纤种子光透镜耦合分析[J].激光与红外,2018,48(2):182-185.
[14]YANG T Y,DING C,ZIOLKOWSKI R W,et al.Circular hole ENZ photonic crystal fibers exhibit high birefringence[J].Optics Express,2018,26(13):17264-17278.
[15]HU X W,PENG J G,YANG L Y,et al.Design and fabrication of a heterostructured cladding solid-core photonic bandgap fiber for construction of Mach-Zehnder interferometer and high sensitive curvature sensor[J].Optics Express,2018,26(6):7005-7012.
[16]LIU Y H,ZHANG F F,ZHAO N,et al.Single transverse mode laser in a center-sunken and cladding-trenched Yb-doped fiber[J].Optics Express,2018,26(3):3421-3426.