有机聚合物非对称弯波导分析与优化  

Analysis and Optimization of Organic Polymer Asymmetric Bent Waveguide

作　　者：高原[1] 张晓霞[1] 廖进昆[1] 

机构地区：[1]电子科技大学光电信息学院,四川成都610054

出　　处：《光学学报》2011年第2期91-96,共6页Acta Optica Sinica

基　　金：国家863计划(2009AA03Z413)资助课题

摘　　要：以缩短有机聚合物马赫-曾德尔(M-Z)电光调制器分支波导长度为目的,针对正弦弯非对称脊形波导进行研究,利用全矢量有限差分光束传输分析方法,系统地分析了不同参数下正弦弯非对称脊形波导的传输损耗,并得出优化的结构参数:脊宽w=4μm、分支高度h=11μm、脊形波导弯外侧芯层平板宽度s=2μm,弯波导长度L=300μm。研究表明,在相同传输损耗条件下,分支波导长度可以减少40%,该结果对有机聚合物M-Z调制器中光波导的设计具有一定的参考价值。In order to reduce the length of polymer branch waveguide in Mach-Zehnder（M-Z） electro-optic polymer modulator, asymmetric sine-bend ridge waveguide is researched. The transmission loss of asymmetric sine-bend ridge waveguide under different parameters is systematically studied by using the full-vector finite-difference beam propagation method （FD-BPM）. The structure is optimized as ridge width w=4 urn, branch height h = 11 μm, slab width on core layer of outboard bend 8 2 μm, and length of the bend waveguide L = 300 μm. The research results have shown that if the symmetric sine-bend ridge waveguide is replaced by asymmetric sine-bend ridge waveguide, the length of branch waveguide can reduce 40 % under the same transmission-loss conditions. The results will have a certain reference value to the design of optical waveguide in polymer M-Z modulator.

关 键 词：导波光学 有机聚合物 S弯波导 非对称脊形波导 全矢量有限差分光束传输法 

分 类 号：TN252.34[电子电信—物理电子学]