作　　者： ; ; ; ; ;

机构地区： 中山大学物理科学与工程技术学院光电材料与技术国家重点实验室

出　　处： 《光子学报》 2005年第12期1795-1798,共4页

摘　　要： 根据行波电吸收调制器(TWEAM)的微波传输特性,提出了等效电路模型.制作了工作波长为850nm的GaAs/GaAlAs材料的TWEAM,并通过等效电路模型分析了特性阻抗Z0、微波传输常数γ和S21,得出脊宽对器件微波特性的影响.从理论上验证了较小脊宽可以降低微波和光波之间的速度失配、波导的传输损耗及传输线和终端及源端之间的阻抗失配.理论模拟得出:脊宽为2μm时,器件提供的带宽为23.9GHz. According to the microwave properties of the traveling-wave electroabsorption modulator （TW- EAM） transmission line, an equivalent circuit model was presented and a GaAs/GaAlAs TW-EAM for 850 nm has been fabricated. The influence of the ridge width on the frequency bandwidth was driven by analyzing the characteristic impedance Z0, microwave transmission constant γ and S21. A reduced velocity mismatch between optical wave and microwave and an impedance mismatch were demonstrated for the narrower ridge width. Potential frequency bandwidth of 23. 9 GHz of a TW-EAM was predicted by theoretical simulation when the ridge width was 2 μm.

关 键 词： 行波电吸收调制器 特性阻抗 传输常数 调制带宽

领　　域： [电子电信] [电子电信]