弯曲光波导模拟优化研究

Research of Bent Waveguide Optimization

用时域有限元差分(FDTD)方法弯曲光波导的优化仿真,减小弯曲光波导损耗。采用OPTIFDTD软件在曲率半径增大到一定的情况下,弯曲损耗在各种损耗中不占优势。在半径一定的条件下,适当选择波导的各个参数进行优化,可以使弯曲损耗达到最低,模拟了弯曲光波导中光的传播,得到了弯曲损耗的变化规律,波导参数不同,弯曲损耗不同,其中有一最佳参数点,由此得到弯曲光波导的参数优化设计值。

This work analyzes the radiation loss of bent waveguides with finite-difference time-domain（FDTD） method. The radiation loss is main part of the bent waveguide loss which is most important limitation for the performance and application of waveguides. This paper presents the situation of the light-wave transition in bent waveguides,and the rule of the radiation loss changing along with the parameters of bent waveguides.