Design of high-speed MUTC-PD with electric field regulation layer  

具有电场调控层的高速MUTC-PD设计

作　　者：XU Jian-bo LIU Kai DONG Xiao-wen DUAN Xiao-feng HUANG Yong-qing WANG Qi REN Xiao-min 徐建波;刘凯;董晓雯;段晓峰;黄永清;王琦;任晓敏(北京邮电大学信息光子学与光通信全国重点实验室,北京100876;北京邮电大学电子工程学院,北京100876)

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]School of Electrical Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《中国光学(中英文)》2025年第2期393-400,共8页Chinese Optics

基　　金：国家自然科学基金(No.62374020);淄博市科技型中小企业创新能力提升项目(No.2022TSGC0046);山东省科技型中小企业创新能力提升项目(No.2022TSGC2290)。

摘　　要：This paper proposes a novel modified uni-traveling-carrier photodiode(MUTC-PD)featuring an electric field regulation layer:a p-type doped thin layer inserted behind the PD’s n-doped cliff layer.This electric field regulation layer enhances the PD’s performance by not only reducing and smoothing the electric field intensity in the collector layer,allowing photo-generated electrons to transit at peak drift velocity,but also improving the electric field intensity in the depleted absorber layer and optimizing the photo-generated carriers’saturated transit performance.Additionally,the transport characteristics of the peak drift velocity of photogenerated electrons in the device’s collection layer can be used to optimize its parasitic characteristics.The electron’s peak drift velocity compensates for the lost transit time.Thus improving the 3 dB bandwidth of the PD’s photo response.Finally obtains a MUTC-PD with a 3 dB bandwidth of 68 GHz at a responsivity of 0.502 A/W,making it suitable for 100 Gbit/s optical receivers.本文提出了一种具有电场调控层的新型改进型单行载流子光探测器(MUTC-PD)。该光探测器中,崖层后新增的p型掺杂电场调控层能够优化收集层中的电场强度,从而使光生电子在收集层中以峰值漂移速度输运,同时能够增强耗尽吸收层中的电场强度,优化其中光生载流子饱和速度输运特性。此外,器件收集层中光生电子的峰值漂移速度输运特性可以进一步优化其寄生电容特性,从而显著提升光探测器的3 dB响应带宽。经过仿真优化设计,获得了响应度为0.502 A/W,3-dB带宽为68 GHz的MUTC-PD,可应用于100 Gbit/s光接收机。

关 键 词：peak electron drift velocity transit performance MUTC-PD optical fiber communication optical interconnect 

分 类 号：TN215[电子电信—物理电子学]