Volume 18 Issue 2
Mar.  2025
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Chinese Optics  > 2025  >  18(2): 393-400.
XU Jian-bo, LIU Kai, DONG Xiao-wen, DUAN Xiao-feng, HUANG Yong-qing, WANG Qi, REN Xiao-min. Design of high-speed MUTC-PD with electric field regulation layer[J]. Chinese Optics, 2025, 18(2): 393-400. doi: 10.37188/CO.EN-2024-0030
Citation: XU Jian-bo, LIU Kai, DONG Xiao-wen, DUAN Xiao-feng, HUANG Yong-qing, WANG Qi, REN Xiao-min. Design of high-speed MUTC-PD with electric field regulation layer[J]. Chinese Optics, 2025, 18(2): 393-400. doi: 10.37188/CO.EN-2024-0030
shu

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

cstr: 32171.14.CO.EN-2024-0030
  • 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

Funds:  Supported by National Natural Science Foundation of China (No. 62374020); Zibo Science and Technology SMEs Innovation Capacity Improvement Project (No. 2022TSGC0046); Shandong Provincial Science and Technology SMEs Innovation Capacity Improvement Project (No. 2022TSGC2290)
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  • Author Bio:

    LIU Kai (1972—), male, from Beijing, doctoral supervisor, received a bachelor's degree in applied electronic technology and a Ph.D. in fiber optic communications and optoelectronics from the Beijing University of Posts and Telecommunications (BUPT), China, in 1994 and 1999, respectively. He wrote a postdoctoral project on the research of optical pumped 1.3 μm VCSEL at the University of Southern California, Los Angeles, CA, USA, in 2000 and 2001. He is an Associate Professor at the School of Electrical Engineering, BUPT. He is the author of more than twenty refereed journal articles and conference papers on optoelectronic technology. His research interests include optical interconnects, optoelectronics integration, and photonic devices for optical fiber communications. He has recently contributed to the single-mode VCSEL for optical interconnects and high-speed, high-power UTC-PD for radio on fiber systems. E-mail: kliu@bupt.edu.cn

  • Corresponding author: kliu@bupt.edu.cn
  • Received Date: 26 Sep 2024
  • Rev Recd Date: 05 Nov 2024
  • Accepted Date: 10 Dec 2024
    • Available Online: 03 Jan 2025
    Abstract

  • 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.

     

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