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Crosstalk analysis in high speed two-dimensional photodetector array directly coupled to multicore fibers
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Paper Abstract

In this study, a high speed two-dimensional photodetector array (2D-PDA) was fabricated for the receipt of transmission signals from multi-core and few-mode fibers. With respect to the multi-core fiber (MCF) designs, the same square-shaped or triangular alignment arrangement as that used in a 19–32 MCF was applied to the 2D-PDA design layout. For a high-density integration with narrow gaps, the typical photodetector’s (PD) pixel size was set within the range of 10 m. The measured 3dB bandwidths were obtained from 20–26.5 GHz for all the pixels. No defects were observed in the pixels. With the constant gap between the pixels, the crosstalk due to the electromagnetic field from a neighboring pixel or wiring was measured using a lightwave component analyzer in the frequency range of 0.1–50 GHz. Under the light-ON condition for all the other pixels, with the exception of a center or corner pixel, the crosstalk at the center pixel was compared with that at the corner pixel. A difference of 1.2 dB at BER = 1 × 10-4 was found between them. A larger crosstalk was observed at the center pixel than at the outer pixel. A discussion on the origin of the crosstalk in the 2D-PDA is presented further in the manuscript, along with the electromagnetic (EM) simulation results.

Paper Details

Date Published: 26 April 2019
PDF: 6 pages
Proc. SPIE 11031, Integrated Optics: Design, Devices, Systems, and Applications V, 1103110 (26 April 2019); doi: 10.1117/12.2520407
Show Author Affiliations
Toshimasa Umezawa, National Institute of Information and Communications Technology (Japan)
Naokatsu Yamamoto, National Institute of Information and Communications Technology (Japan)


Published in SPIE Proceedings Vol. 11031:
Integrated Optics: Design, Devices, Systems, and Applications V
Pavel Cheben; Jiří Čtyroký; Iñigo Molina-Fernández, Editor(s)

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