新型S形光波导低弯曲损耗路径设计  

Design of new type S-shaped optical waveguide low-loss bending path

作　　者：孙光春[1] 周自刚[1] 杨永佳[1] 王强[1] 

机构地区：[1]西南科技大学理学院,绵阳621010

出　　处：《激光技术》2010年第5期690-693,共4页Laser Technology

基　　金：四川省教育厅科技项目资助项目(06ZD1020)

摘　　要：为了降低光波导中的弯曲损耗,从理论上分析了光波导的弯曲损耗、过渡损耗产生的根源,并以此为依据推导出符合弯曲、过渡低损耗的5次,6次,7次,8次和9次幂函数表达式。由MATLAB和MAPLE工具软件计算可知,9次幂函数的图形曲线最圆滑,当取h=125μm,L=800μm(高分支比)时其弯曲损耗可以减小到4.57dB,与传统常用的余弦函数和反正弦函数进行比较,在相同条件下弯曲损耗有了明显的降低。结果表明,所设计的1×4光功分器优化路线,传输性能优良,分配均匀。这为以后Y分支光波导的制作有很好的指导意义。In order to reduce the bending loss of optical waveguide, the source of bending loss and transition loss of optical waveguide was analyzed. A series of curved line expression were obtained, i. e. , five-power function, six-power function, seven- power function, eight-power function and nine-power function expression. With the help of MATLAB and MAPLE, calculation results show that the curves of the nine-power function is the most smooth, when taking h = 125μm, L = 800μm （ high branching ratio） , the loss can be reduced to 4.57dB, which is much smaller than conventional sine function and cosine functions. At last, an optimum route composed of 1 × 4 optical splitters was designed and simulated in which the energy distribution was symmetric and uniform. This can offer some valuable guidance to the research of Y-type optical waveguide.

关 键 词：集成光学 低弯曲损耗 9次幂函数 MATLAB 有限差分光束传输法 

分 类 号：TN252[电子电信—物理电子学] TN256