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以新型光学聚合物Topas环烯烃共聚物(折射率为1.53)为基质,设计了四种微结构聚合物光纤.应用有限元方法对各种光纤在波长0.5—2.0μm范围内的基模有效折射率、模场面积和数值孔径进行了计算.研究了结构参数对模场分布、单模特性和色散特性的影响.得出了具有极大/小模场面积、无限单模传输和平坦近零色散的光纤结构参数.与石英、聚甲基丙烯酸甲酯基质的微结构光纤相比,该光纤具有更大的数值孔径和较宽的平坦近零色散范围.为光纤的制备提供了理论指导.
A new type of optical polymer Topas cyclic olefin copolymer (refractive index of 1.53) as the substrate, designed four kinds of microstructured polymer optical fiber finite element method for a variety of optical fiber in the wavelength range 0.5-2.0μm effective mode of refraction Rate, mode field area and numerical aperture are calculated.The influence of structural parameters on mode field distribution, single-mode characteristic and dispersion characteristic is studied.The maximum / small mode field area, infinite single-mode transmission and flat near zero Dispersion optical fiber structure parameters.Compared with quartz and polymethylmethacrylate microstructured fiber, the fiber has larger numerical aperture and wider flat near-zero dispersion range, which provides theoretical guidance for the preparation of optical fiber.