典型文献
67 GHz light-trapping-structure germanium photodetector supporting 240 Gb/s PAM-4 transmission
文献摘要：
A light-trapping-structure vertical Ge photodetector (PD) is demonstrated. In the scheme, a 3 μm radius Ge mesa is fabricated to constrain the optical signal in the circular absorption area. Benefiting from the light-trapping structure, the trade-off between bandwidth and responsivity can be relaxed, and high opto-electrical bandwidth and high responsivity are achieved simultaneously. The measured 3 dB bandwidth of the proposed PD is around 67 GHz, and the responsivity is around 1.05 A/W at wavelengths between 1520 and 1560 nm. At 1580 nm, the responsivity is still over 0.78 A/W. A low dark current of 6.4 nA is also achieved at -2 V bias voltage. Based on this PD, a clear eye diagram of 100 GBaud four-level pulse amplitude modulation (PAM-4) is obtained. With the aid of digital signal processing, 240 Gb/s PAM-4 signal back-to-back transmission is achieved with a bit error ratio of 1.6×10-2. After 1 km and 2 km fiber transmission, the highest bit rates are 230 and 220 Gb/s, respectively.
文献关键词：
中图分类号：
作者姓名：
Daigao Chen;Hongguang Zhang;Min Liu;Xiao Hu;Yuguang Zhang;Dingyi Wu;Peiqi Zhou;Siyao Chang;Lei Wang;Xi Xiao
作者机构：
National Information Optoelectronics Innovation Center, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China;State Key Laboratory of Optical Communication Technologies and Networks, China Information and Communication Technologies Group Corporation (CICT), Wuhan 430074, China;Peng Cheng Laboratory, Shenzhen 518055, China
文献出处：
引用格式：
[1]Daigao Chen;Hongguang Zhang;Min Liu;Xiao Hu;Yuguang Zhang;Dingyi Wu;Peiqi Zhou;Siyao Chang;Lei Wang;Xi Xiao-.67 GHz light-trapping-structure germanium photodetector supporting 240 Gb/s PAM-4 transmission)[J].光子学研究（英文）,2022(09):2165
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AB值：
0.581104
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