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

Ken Kusakata; Toshimasa Umezawa; Naokatsu Yamamoto; Tetsuya Kawanishi

doi:10.1117/12.2507743

1 February 2019 Improvement of cross-talk of high-speed 2D photodetector array

Ken Kusakata, Toshimasa Umezawa, Naokatsu Yamamoto, Tetsuya Kawanishi

Proceedings Volume 10945, Broadband Access Communication Technologies XIII; 109450O (2019) https://doi.org/10.1117/12.2507743
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

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.

Conference Presentation

Citation Download Citation

Ken Kusakata, Toshimasa Umezawa, Naokatsu Yamamoto, and Tetsuya Kawanishi "Improvement of cross-talk of high-speed 2D photodetector array", Proc. SPIE 10945, Broadband Access Communication Technologies XIII, 109450O (1 February 2019); https://doi.org/10.1117/12.2507743

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