用于下一代数据中心的改进型单行载流子光探测器的研究  

Study of modified uni-traveling carrier photodetector used in next generation optical communication system

作　　者：刘浩冉 袁纬方 廖卓冬 刘凯[1] 段晓峰[1] 黄永清[1] LIU Haoran;YUAN Weifang;LIAO Zhuodong;LIU Kai;DUAN Xiaofeng;HUANG Yongqing(State Key Laboratory of Information Photonics&Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学信息光子学与光通信国家重点实验室,北京100876

出　　处：《光电子．激光》2023年第5期457-465,共9页Journal of Optoelectronics·Laser

基　　金：国家重点研发课题(2018YFB2200803);国家创新研究群体科学基金(62021005)资助项目。

摘　　要：本文研究并提出一种具有电场增强的混合吸收层结构的单行载流子光探测器(electric-enhanced modified uni-traveling carrier photodetector,EE-MUTC-PD)。该结构通过吸收区渐变掺杂增强了光探测器吸收区电场,将吸收区分为部分耗尽和耗尽两个部分,使得光生电子漂移通过吸收区的同时光生空穴会在弛豫时间内被收集,有效解决了单行载流子光探测器(uni-traveling carrier photodetector,UTC-PD)在低光功率注入下不能保持较高带宽的问题,同时实现了高响应度,可用于下一代800 Gb/s光通信系统中。This paper studies and proposes a electric-enhanced modified uni-traveling carrier photodetector(EE-MUTC-PD)with a hybrid absorption layer.This structure introduces graded doping to enhance the electric field in the absorption region of the photodetector,and divides the absorption into two parts,partially depleted and depleted,so that the photogenerated electrons drift through the absorption region and the photogenerated holes will be collected during the relaxation time,which effectively solves the problem that the uni-traveling carrier photodetector(UTC-PD)cannot maintain a high bandwidth under low optical power injection,while achieving high responsivity.This photodetector can be used in the next generation 800 Gb/s optical communication system.

关 键 词：光通信 光探测器 电场 频率响应 量子效率 

分 类 号：E963[军事—军事通信学]