High-uniformity and high-performance waveguide Ge photodetectors for the O and C bands

Author:

Li Xinyu1,Xu Qiang2,Song Ruogu1,Wang Jinyu1,Wang Shuxiao,Yue Wencheng,Wang Wei2,Cai Yan2,Yu Mingbin2

Affiliation:

1. University of Chinese Academy of Sciences

2. Shanghai Industrial μTechnology Research Institute

Abstract

This paper presents the test results for high-performance and high-uniformity waveguide silicon-based germanium (Ge) photodetectors (PDs) for the O band and C band. Both wafer-scale and chip-scale test results are provided. The fabricated lateral pin (LPIN) PDs exhibit a responsivity of 0.97 A/W at a bias of −2V, a bandwidth of 60 GHz, and a no-return-to-zero (NRZ) eye diagram rate of 53.125 Gb/s. Additionally, an average dark current of 22.4 nA was obtained in the vertical pin (VPIN) PDs at −2V by optimizing the doping process. The device can reach an average responsivity of 0.9 A/W in the O band. The standard deviation in a wafer with a dark current and responsivity is as low as 7.77 nA and 0.03 A/W at −2V, respectively.

Funder

National Key Research and Development Program of China

Strategic Pioneer Research Projects of Defense Science and Technology

Publisher

Optica Publishing Group

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