CAJ | 학술논문

　　为了消除光纤通信系统中色散，采用各向异性完全匹配层和全矢量有限元方法，进行了理论分析和实验验证，设计了一种基于八角格子晶体的同轴双芯色散补偿光子晶体光纤；得到了该色散补偿光纤的传输特性如基模有效折射率、色散、损耗和非线性系数方面的数据，并分析了光纤波导色散与色散补偿光纤结构参量之间的关系。结果表明，所设计的光纤在200nm的负色散范围内，拥有负色散值（在波长为1.55μm处有最低负色散值-1500 ps /（nm?km）），同时在E＋S＋C波段有较低的限制损耗（小于3.3dB/km）；非线性效应也得到显著抑制。
　　위료소제광섬통신계통중색산，채용각향이성완전필배층화전시량유한원방법，진행료이론분석화실험험증，설계료일충기우팔각격자정체적동축쌍심색산보상광자정체광섬；득도료해색산보상광섬적전수특성여기모유효절사솔、색산、손모화비선성계수방면적수거，병분석료광섬파도색산여색산보상광섬결구삼량지간적관계。결과표명，소설계적광섬재200nm적부색산범위내，옹유부색산치（재파장위1.55μm처유최저부색산치-1500 ps /（nm?km）），동시재E＋S＋C파단유교저적한제손모（소우3.3dB/km）；비선성효응야득도현저억제。
In order to eliminate dispersion in a fiber communication system ,based on the finite element method and perfectly matched boundary layers ,an octagonal dispersion compensation fiber was proposed.The guiding properties such as fundamental mode,dispersion,confinement loss and nonlinear coefficient were obtained.Besides,it was shown that the negative dispersion over 200nm bandwidth was obtained (the minimum value was -1500ps/(nm?km) at λ=1.55μm).Meanwhile,the fiber exhibited low confinement loss less than 3.3dB/km at 1.55μm in the entire E+S+C band.Also,the nonlinear effect was eliminated effectively because of the low nonlinear coefficient .