Design and optimization of evanescently coupled waveguide photodiodes

• 作 者: 姚辰 程远兵 伍剑 徐坤 邱吉芳 赵玲娟 王圩 林金桐
• 机 构: Key Laboratory of Information Photonics and Optical Communications,Ministry of Education,Beijing Uni
• 出 处: 半导体学报
• 发表日期: 2011年10期
• 关键词: waveguide absorber matching linearity normalized overcome utilizing utilized sat

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.

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.