25-Gbaud 4-WDM Free-Space Optical Communication using High-Speed 2D Photodetector Array

Toshimasa Umezawa, Takahide Sakamoto, Atsushi Kanno, Atsushi Matsumoto, Kouichi Akahane, Naokatsu Yamamoto, Tetsuya Kawanishi

    Research output: Contribution to journalArticle

    1 Citation (Scopus)


    We present a newly developed two-dimensional photodetector array (2D-PDA) device and its application for short-range free-space optical (FSO) communication using a wavelength-division multiplexed beam. The 2D-PDA enables direct optical coupling to the FSO beam, and excludes the optical alignment process for the 10 μm single-mode fiber and the beam-tracking function. In the wavelength-division multiplexing (WDM) FSO communication demonstration, a four-wavelength 25-Gbaud parallel-beam filtered by a 4-WDM filter through free space was successfully received by a 4-pixel in the 2D-PDA. This paper discusses the design and fabrication in the 2D-PDA device, as well as the FSO communication demonstration using four combined WDM filters.

    Original languageEnglish
    JournalJournal of Lightwave Technology
    Publication statusAccepted/In press - 2018 Jan 1



    • Data centers
    • free space optical communication
    • high speed
    • Optical beams
    • Optical fiber communication
    • Optical fiber filters
    • Optical fibers
    • two-dimensional photodetector array
    • Wavelength division multiplexing
    • wavelength division multiplexing

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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