Single Lane Beyond 400 Gbit/s Optical Direct Detection Based on a Sidewall-doped Ge-Si Photodetector

Xiao Hu,Dingyi Wu,Ye Liu,Min Liu,Jia Liu,Hongguang Zhang,Yuguang Zhang,Daigao Chen,Lei Wang,Xi Xiao,Shaohua Yu

2022 European Conference on Optical Communication (ECOC)（2022）

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摘要

We present a photodetector in which the sloped sidewalls of germanium are carefully doped. The 3-dB bandwidth > 55 GHz and responsivity of 1 A/W are demonstrated. Single lane direct detection of record-high speed 290 Gbit/s PAM-4 and 408 Gbit/s PAM-8 optical signals are achieved.

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