| 行波电吸收调制器中脊宽对频带宽度的影响 |
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| 引用本文： | 邢晓波,刘叶新,陈晓文,傅思镜,林位株.行波电吸收调制器中脊宽对频带宽度的影响[J].光子学报,2005,34(12):1795-1798. |
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| 作者姓名： | 邢晓波 刘叶新 陈晓文 傅思镜 林位株 |
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| 作者单位： | 中山大学光电材料与技术国家重点实验室,广州510275;中山大学光电材料与技术国家重点实验室,广州510275;中山大学光电材料与技术国家重点实验室,广州510275;中山大学光电材料与技术国家重点实验室,广州510275;中山大学光电材料与技术国家重点实验室,广州510275 |
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| 基金项目： | 国家和广东省自然科学基金项目资助（批准号：60178020,10274107,011204,2002811601） |
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| 摘 要： | 根据行波电吸收调制器（TW-EAM）的微波传输特性，提出了等效电路模型.制作了工作波长为850 nm的GaAs/GaAlAs材料的TW-EAM，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2 μm时，器件提供的带宽为23.9 GHz.
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| 关 键 词： | 行波电吸收调制器(TW-EAM) 特性阻抗 传输常数 调制带宽 |
| 收稿时间： | 2004-09-10 |
| 修稿时间： | 2004年9月10日 |
Influence of Ridge Width on Its Frequency Bandwidth of Traveling-wave Electroabsorption Modulators |
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| Xing Xiaobo,Liu Yexin,Chen Xiaowen,Fu Sijing,Lin Weizhu.Influence of Ridge Width on Its Frequency Bandwidth of Traveling-wave Electroabsorption Modulators[J].Acta Photonica Sinica,2005,34(12):1795-1798. |
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| Authors: | Xing Xiaobo Liu Yexin Chen Xiaowen Fu Sijing Lin Weizhu |
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| Institution: | The State Key Lab. of Optoelectronic Materials and Technol. , Zhongshan University,Guangzhou 510275 |
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| Abstract: | 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 Z_0, microwave transmission constant γ and S_ 21. 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. |
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| Keywords: | Traveling-wave electroabsorption modulator (TW-EAM) Characteristic impedance Transmission constant Modulation bandwidth |
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