| 脊形结构LiNbO3光波导调制器的扩展点匹配法分析 |
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| 引用本文： | 钱辰,祝宁华,潘裕斌,钟宝璇.脊形结构LiNbO3光波导调制器的扩展点匹配法分析[J].中国激光,2004,31(3):18-322. |
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| 作者姓名： | 钱辰 祝宁华 潘裕斌 钟宝璇 |
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| 作者单位： | 1. 中国科学院半导体所集成光电国家重点实验室,北京,100083
2. 香港城市大学电子工程系,香港 |
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| 基金项目： | 杰出青年基金 (No .6 982 5 10 9)，86 3计划 (No .2 0 0 1AA312 0 30 )，973课题 (No .G2 0 0 0 0 36 6 0 1)资助项目 |
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| 摘 要： | 将点匹配法扩展应用于脊形结构LiNbO3光波导调制器电极的准静态分析中。将调制器各区域的势函数表示为该区域中满足Laplace方程的一系列基函数的级数，匹配边界上有限个点的边界条件以确定出级数项的系数。通过势函数得到脊形结构LiNbO3光波导调制器结构中电场分布的解析表达式，利用求得的电场可以得到调制器特性阻抗及有效折射率。所得的特性阻抗和有效折射率与采用有限元法得到的结果十分吻合。这一分析方法简便快捷，精度高，能够处理电极有一定厚度的多层光波导调制器结构。
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| 关 键 词： | 光纤通信 扩展点匹配法 光波导调制器 准静态分析 LiNbO3 脊形结构 |
| 收稿时间： | 2002/10/9 |
Analysis of Ridge-Type LiNbO3 Optical Waveguide Modulators with the Extended Point-Matching Method |
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| QIAN Chen ,ZHU Ning-hua ,Edwin Yue Bun PUN ,Po Sheun CHUNG State Key Laboratory on Integrated Optoelectronics.Analysis of Ridge-Type LiNbO3 Optical Waveguide Modulators with the Extended Point-Matching Method[J].Chinese Journal of Lasers,2004,31(3):18-322. |
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| Authors: | QIAN Chen ZHU Ning-hua Edwin Yue Bun PUN Po Sheun CHUNG State Key Laboratory on Integrated Optoelectronics |
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| Affiliation: | QIAN Chen 1,ZHU Ning-hua 1,Edwin Yue Bun PUN 2,Po Sheun CHUNG 2 1State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,The Chinese Academy of Sciences,Beijing 100083,China 2Department of Electronic Engineering,City University of Hong Kong,Hong Kong,China |
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| Abstract: | The point-matching method is extended to analyze a travelling-wave electrode structure for ridge-type LiNbO 3 optical modulators. The potential function is expended in terms of a Fourier sine series, and the coefficients of the series are obtained by satisfying the boundary conditions in the contact plane at a finite, discrete set of pints. The calculated fields are used to estimate the characteristic impedance and microwave effective index. This method provides a simple and fast approach to the quasi-static analysis of the multi-layered structures with finite electrode thickness. The results agree well with those obtained using the finite-element method. Some significant conclusions are made for design and optimization of modulators. |
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| Keywords: | optical fiber communication technique point-matching method optical waveguide modulator quasi-static analysis LiNbO 3 |
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