Improvement of cross-talk of high-speed 2D photodetector array

Ken Kusakata, Toshimasa Umezawa, Naokatsu Yamamoto, Tetsuya Kawanishi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


We designed and fabricated a high-bandwidth, 32-pixel, two-dimensional photodetector array (2D-PDA) for receiving transmission signals from multi-core and few-mode fibers. Pixel sizes of 10, 20, and 30 μm were employed, with a pixel gap of 14 μm. We obtained 3 dB bandwidths of 23.8∼29.8 GHz, 19.1∼20.8 GHz, and 9.0∼13.7 GHz for pixel sizes of 10, 20, and 30 μm, respectively. The device exhibited increasing noise due to RF crosstalk, which was caused by neighboring wires or pixels. In this study, we explored different pixel arrangements to reduce the crosstalk between neighboring pixels, and confirmed the frequency characteristics of the 2D-PDA pixels. Moreover, using electromagnetic simulation software, the RF crosstalk of -30 dB between neighboring pixels was confirmed up to the 10-20 GHz range. The crosstalk analysis, crosstalk reduction design in 2D-PDA devices, and its experimental results are displayed and discussed.

Original languageEnglish
Title of host publicationBroadband Access Communication Technologies XIII
EditorsBenjamin B. Dingel, Spiros Mikroulis, Katsutoshi Tsukamoto
ISBN (Electronic)9781510625327
Publication statusPublished - 2019
EventBroadband Access Communication Technologies XIII 2019 - San Francisco, United States
Duration: 2019 Feb 42019 Feb 5

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceBroadband Access Communication Technologies XIII 2019
Country/TerritoryUnited States
CitySan Francisco


  • 2-dimension photodetector arrays
  • crosstalk
  • high speed

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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