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High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region

Author

Listed:
  • Kaiheng Zou

    (University of Southern California)

  • Kai Pang

    (University of Southern California)

  • Hao Song

    (University of Southern California)

  • Jintao Fan

    (Tianjin University)

  • Zhe Zhao

    (University of Southern California)

  • Haoqian Song

    (University of Southern California)

  • Runzhou Zhang

    (University of Southern California)

  • Huibin Zhou

    (University of Southern California)

  • Amir Minoofar

    (University of Southern California)

  • Cong Liu

    (University of Southern California)

  • Xinzhou Su

    (University of Southern California)

  • Nanzhe Hu

    (University of Southern California)

  • Andrew McClung

    (University of Massachusetts Amherst)

  • Mahsa Torfeh

    (University of Massachusetts Amherst)

  • Amir Arbabi

    (University of Massachusetts Amherst)

  • Moshe Tur

    (Tel Aviv University)

  • Alan E. Willner

    (University of Southern California
    University of Southern California)

Abstract

Due to its absorption properties in atmosphere, the mid-infrared (mid-IR) region has gained interest for its potential to provide high data capacity in free-space optical (FSO) communications. Here, we experimentally demonstrate wavelength-division-multiplexing (WDM) and mode-division-multiplexing (MDM) in a ~0.5 m mid-IR FSO link. We multiplex three ~3.4 μm wavelengths (3.396 μm, 3.397 μm, and 3.398 μm) on a single polarization, with each wavelength carrying two orbital-angular-momentum (OAM) beams. As each beam carries 50-Gbit/s quadrature-phase-shift-keying data, a total capacity of 300 Gbit/s is achieved. The WDM channels are generated and detected in the near-IR (C-band). They are converted to mid-IR and converted back to C-band through the difference frequency generation nonlinear processes. We estimate that the system penalties at a bit error rate near the forward error correction threshold include the following: (i) the wavelength conversions induce ~2 dB optical signal-to-noise ratio (OSNR) penalty, (ii) WDM induces ~1 dB OSNR penalty, and (iii) MDM induces ~0.5 dB OSNR penalty. These results show the potential of using multiplexing to achieve a ~30X increase in data capacity for a mid-IR FSO link.

Suggested Citation

  • Kaiheng Zou & Kai Pang & Hao Song & Jintao Fan & Zhe Zhao & Haoqian Song & Runzhou Zhang & Huibin Zhou & Amir Minoofar & Cong Liu & Xinzhou Su & Nanzhe Hu & Andrew McClung & Mahsa Torfeh & Amir Arbabi, 2022. "High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35327-w
    DOI: 10.1038/s41467-022-35327-w
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    References listed on IDEAS

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    1. Mengjie Yu & Yoshitomo Okawachi & Austin G. Griffith & Nathalie Picqué & Michal Lipson & Alexander L. Gaeta, 2018. "Silicon-chip-based mid-infrared dual-comb spectroscopy," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    2. Nicolas K. Fontaine & Roland Ryf & Haoshuo Chen & David T. Neilson & Kwangwoong Kim & Joel Carpenter, 2019. "Laguerre-Gaussian mode sorter," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
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    3. Tuqiang Pan & Jianwei Ye & Haotian Liu & Fan Zhang & Pengbai Xu & Ou Xu & Yi Xu & Yuwen Qin, 2024. "Non-orthogonal optical multiplexing empowered by deep learning," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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