Design and optimization of evanescently coupled waveguide photodiodes

We present the design and optimization of evanescently coupled waveguide photodiodes（EC-WPDs） based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numeri...

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Published inJournal of semiconductors Vol. 32; no. 10; pp. 58 - 61
Main Author 姚辰 程远兵 伍剑 徐坤 邱吉芳 赵玲娟 王圩 林金桐
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.10.2011
Subjects
Beams (radiation)
Design engineering
High speed
Mathematical models
Optimization
Photodiodes
Semiconductors
Waveguides
优化
光束传播法
光电二极管
光通信系统
模式理论
波导耦合
耦合波导
设计
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ISSN1674-4926
DOI10.1088/1674-4926/32/10/104006

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Summary:We present the design and optimization of evanescently coupled waveguide photodiodes（EC-WPDs） based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numerical simulation shows that high-speed（40 GHz）,high quantum efficiency（81%） and high linearity photodiodes can be achieved, and EC-WPDs are promising devices for future optical communication systems.
Bibliography:photodiode; coupling modes theory; beam propagation method
11-5781/TN
We present the design and optimization of evanescently coupled waveguide photodiodes（EC-WPDs） based on the coupling modes theory and the beam propagation method.Efficient focalization of the optical power in the absorber is achieved by an appropriate choice of index matching layers of EC-WPDs.Numerical simulation shows that high-speed（40 GHz）,high quantum efficiency（81%） and high linearity photodiodes can be achieved, and EC-WPDs are promising devices for future optical communication systems.
Yao Chen~＋,Cheng Yuanbing~1,Wu Jian~1,Xu Kun Qiu Jifang~2,Zhao Lingjuan~2,Wang Wei and Lin Jintong 1 Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China 2 Key Laboratory of Semiconductor Materials Science,Institute of Semiconductors,Chinese Academy of Sciences, Beijing 100083,China
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ISSN:1674-4926
DOI:10.1088/1674-4926/32/10/104006