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Distinguished Researcher Masahiro Nakagawa
  • Distinguished Researcher

    Masahiro Nakagawa

  • NTT Network Service Systems Laboratories

Research on high-capacity optical node and networking technologies toward sustainable evolution of optical network infrastructure

We aim to establish novel advanced technologies for enabling to create high-capacity optical node that efficiently handles enormous optical wavelengths and to maximize wavelength utilization, which can support sustainable evolution of IOWN All-Photonics Network (APN).

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Recent papers

  1. Hiroki Kawahara, Kohei Saito, Masahiro Nakagawa, Takashi Kubo, Takeshi Seki, Takeshi Kawasaki, and Hideki Maeda, "Real-time experiment and numerical analysis of highly-survivable adaptive restoration for high-capacity optical signal transmission," IEICE Transactions on Communications, vol. E104-B, no. 4, pp. 360-369, Apr. 2020.
  2. Masahiro Nakagawa, Hiroki Kawahara, Takeshi Seki, and Takashi Miyamura, "Highly efficient multi-band optical networks with wavelength-selective band switching," IEICE TRANSACTIONS on Communications, vol. E106-B, no. 5, pp. 416-426, May 2023.
  3. H. Minami, K. Hirose, T. Fukatani, M. Nakagawa, T. Seki et al., "Low-penalty band-switchable multi-band optical cross-connect using PPLN-based inter-band wavelength converters," J. Lightw. Technol., vol. 42, no. 4, pp. 1242-1249, Feb. 2024.
  4. M. Nakagawa, H. Minami, T. Fukatani, T. Seki, R. Hayashi, and T. Kuwahara, "Multi-band optical networking: Recent advances toward IOWN all-photonics network," IEICE TRANSACTIONS on Communications, vol. E107-B, no. 12, pp. 842-851, Dec. 2024.
  5. H. Minami, T. Fukatani, M. Nakagawa, T. Seki et al., "Band-switchable multi-band optical cross-connect using PPLN-based all-optical inter-band wavelength converters," J. Lightw. Technol., vol. 43, no. 4, pp. 1725-1735, Feb. 2025.

Recent international conferences

  1. Masahiro Nakagawa, Hiroki Kawahara, Kana Masumoto, Toshiya Matsuda, and Kazuyuki Matsumura, "Performance evaluation of multi-band optical networks employing distance-adaptive resource allocation," Proc. OECC 2020, Oct. 2020.
  2. Hiroki Kawahara, Masahiro Nakagawa, Takeshi Seki, and Takashi Miyamura, "Experimental demonstration of wavelength-selective band/direction- switchable multi-band OXC using an inter-band all-optical wavelength converter," Proc. ECOC 2020, paper Tu1H-5, Dec. 2020.
  3. Masahiro Nakagawa, Hiroki Kawahara, Takeshi Seki, and Takashi Miyamura, "Adaptive link-by-link band allocation: A novel adaptation scheme in multi-band optical networks," Proc. ONDM 2021, June/July 2021.
  4. Toshiya Matsuda, Kota Nishiyama, Kana Masumoto, Masahiro Nakagawa, and Takashi Miyamura, "Ultra-low latency short packet transmission experiments with optical bus platform based on PCIe," Proc. OFC 2022, paper Tu3G.2, Mar. 2022.
  5. Masahiro Nakagawa, Takeshi Seki, and Takashi Miyamura, "Techno-economic potential of wavelength-selective band-switchable OXC in S+C+L band optical networks," Proc. OFC 2022, paper W2A.24, Mar. 2022.
  6. Haruka Minami, Kenta Hirose, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki et al., "Experimental demonstration of cascadable PPLN-based inter-band wavelength converters for band-switchable multi-band optical cross-connect," Proc. OFC 2023, paper M4G.1., Mar. 2023.
  7. Masahiro Nakagawa, "Recent progress of multi-band optical networking technologies toward realizing IOWN All-Photonics Network," ICETC 2023, I4-1, Nov./Dec. 2023.
  8. Haruka Minami, Takafumi Fukatani, Masahiro Nakagawa, Takeshi Seki et al., "Cascadability of PPLN-based inter-band wavelength conversion for band-switchable multi-band optical cross-connect," Proc. OFC 2024, paper W3B.1, Mar. 2024.
  9. M. Nakagawa, T. Fukatani, T. Seki, R. Hayashi, and T. Kuwahara, "QoT-aware adaptive multi-band networking over hybrid fibers enabled by wavelength-selective band switching," Proc. OFC 2024, paper Th2A.34, Mar. 2024.
  10. M. Nakagawa, T. Seki, R. Hayashi, and T. Kuwahara, "Impact of wavelength-selective band switching on path protection in multi-band optical networks," Proc. ICC 2024, DOI: 10.1109/ICC51166.2024.10622829, June 2024.

Keywords

Optical node system、Optical networking、Ultra-wideband optical transmission、All-Photonics Network

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