CAJ | 학술논문

分别以碲玻璃和SF6玻璃作为基质材料,设计制作了一种基于双折射效应的新型八边形晶格双芯光子晶体光纤偏振分束器。应用全矢量有限元法( FEM)分析了碲玻璃和SF6两种双芯光子晶体光纤中结构参数对双折射和相对耦合长度特性的影响,数值模拟了碲玻璃和SF6两种偏振分束器的性能。结果表明：在碲玻璃和SF6两种双芯光子晶体光纤中,增大椭圆率可同时增加结构的双折射和相对耦合长度,与SF6玻璃偏振分束器相比较,碲玻璃偏振分束器具有更高的消光比和更大的带宽,即在工作波长为1.55滋m处,消光比达到最小值-53.46 dB,且消光比小于-20 dB的带宽为120 nm。
분별이제파리화SF6파리작위기질재료,설계제작료일충기우쌍절사효응적신형팔변형정격쌍심광자정체광섬편진분속기。응용전시량유한원법( FEM)분석료제파리화SF6량충쌍심광자정체광섬중결구삼수대쌍절사화상대우합장도특성적영향,수치모의료제파리화SF6량충편진분속기적성능。결과표명：재제파리화SF6량충쌍심광자정체광섬중,증대타원솔가동시증가결구적쌍절사화상대우합장도,여SF6파리편진분속기상비교,제파리편진분속기구유경고적소광비화경대적대관,즉재공작파장위1.55자m처,소광비체도최소치-53.46 dB,차소광비소우-20 dB적대관위120 nm。
Based on the birefringence effect, a novel duel-core photonic crystal fiber polarization beam splitter was proposed. Tellurite glass and SF6 glass were used as the material for the PCF, re-spectively. Using the full-vector finite element method ( FEM) , the effects of structural parameters on birefringence and relative coupling length were analyzed, and the characteristics of the splitters, such as coupling length, extinction ratio and bandwidth were simulated. The numerical simulation results demonstrate that the tellurite glass splitter has higher extinction ratio and bandwidth than the SF6 glass splitter. The extinction ratio of the tellurite glass splitter is -53. 46 dB at the wavelength of 1. 55 μm, and the bandwidth is over 120 nm when the extinction ratio is less than -20 dB.