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设计了一种基于光学偏置并以有机聚合物PMMA/DR1作为光波导材料的新型Mach-Zehdner调制器。利用有效折射率法(EIM),分析了脊波导的有效折射率随脊波导结构参数变化情况,包括脊宽w、脊高b和芯层厚度d,以及上下包层厚度。采用微带线单电极调制方式结合脊波导的结构设计,实现了微波和光波的速率匹配。针对优化的结构参数,采用BPM方法进行光场和功率传输的模拟仿真,完成了非等臂Mach-Zehnder调制器的结构设计,实现了两臂89.84°的初始相位差,消光比约为27 dB。
A novel Mach-Zehdner modulator based on optical bias and using organic polymer PMMA / DR1 as optical waveguide material was designed. Using effective refractive index (EIM) method, the effective refractive index of ridge waveguide is analyzed, including ridge width w, ridge height b and core thickness d, and upper and lower cladding thickness. The microstrip line single-electrode modulation mode combined with ridge waveguide structure design, to achieve the microwave and light-wave rate matching. In order to optimize the structural parameters, the simulation of light field and power transmission by BPM method is completed. The structural design of the non-arm Mach-Zehnder modulator is completed. The initial phase difference between the two arms is 89.84 °. The extinction ratio is about 27 dB .