400-Gb/s DMT-SDM transmission based on membrane DML-array-on-silicon

Nikolaos Panteleimon Diamantopoulos, Kota Shikama, Hidetaka Nishi, Takuro Fujii, Toshiki Kishi, Koji Takeda, Yoshiteru Abe, Takashi Matsui, Takaaki Kakitsuka, Hiroshi Fukuda, Kazuhide Nakajima, Shinji Matsuo

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4 Citations (Scopus)


We report on space-division multiplexing (SDM) transmissions of up to 400 Gb/s over a homogeneous four-core fiber using discrete multitone (DMT) modulation for intra-datacenter applications and 200/400 GbE links. The transmission system is enabled by a compact, SDM-channel scalable, multi-core fiber (MCF) pluggable, and energy-efficient SDM transmitter composed of a 4-channel 1.3-μm membrane directly modulated laser (DML) array-on-silicon integrated with a fiber-bundle type fan-in with loss of less than 1 dB and negligible optical and electrical crosstalk (XT). By simultaneously modulating all four lasers, 200-Gb/s (50-Gb/s/channel) and 400-Gb/s (100-Gb/s/channel) are achieved over a 425-m MCF link for KP4 and soft-decision forward error correction, respectively, with a power reduction of ∼6× compared with conventional DML transmitters. Additionally, numerical simulations based on a detailed rate-equations model predict the feasibility of the system for MCF transmissions up to 10 km even with moderate levels of XT.

Original languageEnglish
Article number8570776
Pages (from-to)1805-1812
Number of pages8
JournalJournal of Lightwave Technology
Issue number8
Publication statusPublished - 2019 Apr 15
Externally publishedYes



  • Directly modulated laser on silicon
  • discrete multi-tone
  • space-division multiplexing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Diamantopoulos, N. P., Shikama, K., Nishi, H., Fujii, T., Kishi, T., Takeda, K., Abe, Y., Matsui, T., Kakitsuka, T., Fukuda, H., Nakajima, K., & Matsuo, S. (2019). 400-Gb/s DMT-SDM transmission based on membrane DML-array-on-silicon. Journal of Lightwave Technology, 37(8), 1805-1812. [8570776]. https://doi.org/10.1109/JLT.2018.2885792