High speed 2D photodetector array for space and mode-division multiplexing fiber communications

Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    We report a high-data-rate two-dimensional photodetector array (2D-PDA) operated over 10 GHz for compact receiver systems in multicore fiber (MCF), few-mode fiber (FMF), and FMF-MCF, which can be directly coupled to multiparallel beams from the MCF and FMF. The 2D-PDA (pixel size of 20-30 μm, pixel number of 32) were designed and characterized for the frequency response and crosstalk. In the on-wafer probing test, the averaged 3-dB bandwidth of 11.2 GHz and 19.8 GHz were measured for 30-μm and 20-μm pixels, respectively. In the MCF direct-coupling demonstration with the 2D-PDA, the selected 16 pixels could work well at 25 Gbps (non-return-to-zero: NRZ). By using triangular-shape-aligned seven-core fiber and the square-shape-aligned seven cores in the 2D-PDA, the coupling efficiency and alignment tolerance were investigated for the universal MCF photoreceiver. In the demonstration of the mode-division multiplexing (MDM) signal detection with 2D-PDA, the multiplexed three-mode signal with 20-Gbps quadrature phase-shift keying (QPSK) was directly coupled to the 2D-PDA. Through the electrical phase matching system with the multiple-input multiple-output (MIMO) function, the three-mode signal (20 Gbps in each mode) could be successfully detected and separated error-free.

    Original languageEnglish
    JournalJournal of Lightwave Technology
    DOIs
    Publication statusAccepted/In press - 2018 Jun 13

    Fingerprint

    multiplexing
    division
    photometers
    communication
    high speed
    fibers
    pixels
    quadrature phase shift keying
    MIMO (control systems)
    signal detection
    phase matching
    crosstalk
    frequency response
    receivers
    alignment
    wafers
    bandwidth

    Keywords

    • crosstalk
    • direct coupling
    • few-mode fiber
    • high speed
    • multi-core fiber
    • two-dimensional photodetector array

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    High speed 2D photodetector array for space and mode-division multiplexing fiber communications. / Umezawa, Toshimasa; Sakamoto, Takahide; Kanno, Atsushi; Yamamoto, Naokatsu; Kawanishi, Tetsuya.

    In: Journal of Lightwave Technology, 13.06.2018.

    Research output: Contribution to journalArticle

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