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A research on the optical circuits for Tbit/s optical Ethernet system using wavelength/mode division multiplexing

Research Project

Project/Area Number 21H01378
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionHokkaido University

Principal Investigator

Fujisawa Takeshi  北海道大学, 情報科学研究院, 准教授 (70557660)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords光ファイバ通信 / 波長分割多重 / モード分割多重 / シリコンフォトニクス / Siフォトニクス
Outline of Research at the Start

光イーサネット伝送容量の飛躍的増加を目的とし、波長・モード多重伝送融合実現のための、通信用光デバイスに関する研究を行う。特に、Si導波路を用いた、超小型モード合分波器など、各種のモード制御平面光波回路、及び、モード制御技術の援用による、波長制御素子の劇的な高性能化について研究し、テラビット級光イーサネット実現のための、波長・モード分割多重伝送融合技術の基盤形成を目指す。

Outline of Final Research Achievements

Optical devices for wavelength/mode division multiplexing (WDM/MDM) for future Tbit/s optical Ethernet system are investigated. For MDM, Si-waveguide based mode multiplexers (MUX) designed by wavefront matching method are demonstrated. For WDM, a Mach-Zhender wavelength MUX with strong fabrication tolerance is designed. An optical multiplexer, in which these mode and wavelength MUXs are monolithically integrated, is successfully fabricated and demonstrated. Furthermore, for future optical Ethernet for chip-to-chip communication, ultrasmall mosaic-based devices are investigated, and multiband mode MUX, and ultrasmall wavelength MUX based on mosaic structure are demonstrated.

Academic Significance and Societal Importance of the Research Achievements

データセンタにおける通信容量は急激に伸びており、その伝送容量増大は喫緊の課題となっている。これまで用いられてきた波長分割多重技術だけでは、将来のテラビットクラスイーサネットを実現するのは困難になりつつある。モード分割多重技術は、空間分割多重技術の一つであり、光通信に残された最後の多重化軸と言われ、波長分割多重技術と合わせて用いることで、伝送容量の飛躍的増大が可能であるが、そこに用いる素子は使用帯域が広く、なおかつ製造トレランスに強くなければならない。本研究では、これらの要求に応える素子を考案し、実現した。これらの成果は将来のテラビットクラスイーサネット実現のための基礎技術となると考えられる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (39 results)

All 2024 2023 2022 2021

All Journal Article (13 results) (of which Peer Reviewed: 10 results,  Open Access: 2 results) Presentation (26 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Journal Article] Bayesian design of mosaic-based mode multiplexers for various wavelength bands2023

    • Author(s)
      Fujisawa Takeshi、Mitarai Takuya、Okimoto Takuya、Kono Naoya、Fujiwara Naoki、Sato Takanori、Yagi Hideki、Saitoh Kunimasa
    • Journal Title

      Optics Express

      Volume: 31 Issue: 16 Pages: 26842-26842

    • DOI

      10.1364/oe.492673

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ultrasmall Power Splitters With Triangular Lattice Mosaic Patterns Designed by Bayesian DBS Method2023

    • Author(s)
      Fujisawa Takeshi、Mitarai Takuya、Sawada Yusuke、Okimoto Takuya、Kono Naoya、Fujiwara Naoki、Muratsubaki Taichi、Yagi Hideki
    • Journal Title

      IEEE Photonics Technology Letters

      Volume: 35 Issue: 21 Pages: 1139-1142

    • DOI

      10.1109/lpt.2023.3306313

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 6-mode and 10-mode photonic lantern mode multi/demultiplexers based on silica planar lightwave circuit2023

    • Author(s)
      Wang Han、Fujisawa Takeshi、Sato Takanori、Mori Takayoshi、Sakamoto Taiji、Yamashita Yoko、Imada Ryota、Nakajima Kazuhide、Saitoh Kunimasa
    • Journal Title

      Optics Communications

      Volume: 529 Pages: 129098-129098

    • DOI

      10.1016/j.optcom.2022.129098

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct-binary-search algorithm for fabrication-tolerant photonic-crystal-like subwavelength structures and its application to a four-mode waveguide crossing in 2 μm waveband2022

    • Author(s)
      Muratsubaki Taichi、Fujisawa Takeshi、Sawada Yusuke、Sato Takanori、Saitoh Kunimasa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 4 Pages: 042003-042003

    • DOI

      10.35848/1347-4065/ac54fc

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel algorithm of wavefront-matching method for stable and efficient design of Si waveguides2022

    • Author(s)
      Yusuke Sawada, Takeshi Fujisawa, Takanori Sato, and Kunimasa Saitoh
    • Journal Title

      IEEE Photonics Technology Letters

      Volume: 34 Issue: 7 Pages: 359-362

    • DOI

      10.1109/lpt.2022.3159830

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hybrid algorithm based on the grey wolf optimizer and direct binary search for the efficient design of a mosaic-based device2022

    • Author(s)
      Nakamura Kodai、Fujisawa Takeshi、Saitoh Kunimasa
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 39 Issue: 5 Pages: 1329-1329

    • DOI

      10.1364/josab.451593

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Comparison of Scalar and Vector WFM Method Through the Design of High-Δ Waveguide Lenses2022

    • Author(s)
      Sawada Yusuke、Fujisawa Takeshi、Sato Takanori、Saitoh Kunimasa
    • Journal Title

      IEEE Photonics Technology Letters

      Volume: 34 Issue: 10 Pages: 533-536

    • DOI

      10.1109/lpt.2022.3170940

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Proposal of mosaic-based 2 × 2 3-dB couplers for prospective on-chip communication in mid-infrared wavelengths around 2.1??μm2022

    • Author(s)
      Muratsubaki Taichi、Fujisawa Takeshi、Sato Takanori、Saitoh Kunimasa
    • Journal Title

      Journal of the Optical Society of America B

      Volume: 39 Issue: 9 Pages: 2522-2522

    • DOI

      10.1364/josab.460644

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-tolerance CWDM4 wavelength multiplexer based on 2×2/2×1 MZ filters with polarization multiplexing2021

    • Author(s)
      Nakamura Kodai、Fujisawa Takeshi、Sato Takanori、Saitoh Kunimasa
    • Journal Title

      IEICE Electronics Express

      Volume: 18 Issue: 8 Pages: 20210110-20210110

    • DOI

      10.1587/elex.18.20210110

    • NAID

      130008029753

    • ISSN
      1349-2543
    • Year and Date
      2021-04-25
    • Related Report
      2021 Annual Research Report
  • [Journal Article] Bayesian direct-binary-search algorithm for the efficient design of mosaic-based power splitters2021

    • Author(s)
      Fujisawa Takeshi、Saitoh Kunimasa
    • Journal Title

      OSA Continuum

      Volume: 4 Issue: 4 Pages: 1258-1258

    • DOI

      10.1364/osac.422116

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Six-mode scrambler based on cascaded side-wall grating waveguides2021

    • Author(s)
      Fujisawa Takeshi、Sakamoto Taiji、Miyata Masashi、Matsui Takashi、Hashimoto Toshikazu、Kasahara Ryoichi、Mori Takayoshi、Imada Ryota、Nakajima Kazuhide、Saitoh Kunimasa
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: 6 Pages: 062002-062002

    • DOI

      10.35848/1347-4065/abfa31

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Broadband silicon four-mode multi/demultiplexer designed by a wavefront matching method2021

    • Author(s)
      Sawada Yusuke、Fujisawa Takeshi、Sato Takanori、Saitoh Kunimasa
    • Journal Title

      Optics Express

      Volume: 29 Issue: 17 Pages: 27322-27322

    • DOI

      10.1364/oe.434178

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modal amplitude and phase estimation of multimode near field patterns based on artificial neural network with the help of grey-wolf-optimizer2021

    • Author(s)
      Sugawara Naoto、Fujisawa Takeshi、Nakamura Kodai、Sawada Yusuke、Mori Takayoshi、Sakamoto Taiji、Imada Ryota、Matsui Takashi、Nakajima Kazuhide、Saitoh Kunimasa
    • Journal Title

      Optical Fiber Technology

      Volume: 67 Pages: 102720-102720

    • DOI

      10.1016/j.yofte.2021.102720

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] ベイズDBS設計による2段モザイク型4波長合波器2024

    • Author(s)
      澤田祐甫、藤澤剛、御手洗拓矢、沖本拓也、八木英樹、藤原直樹
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Compact passive waveguides using mosaic-based device with triangular lattice photonic crystal-like structure2023

    • Author(s)
      T. Mitarai, T. Fujisawa, Y. Sawada, T. Okimoto, N. Kono, N. Fujiwara, T. Muratsubaki, T. Sato, K. Saitoh, and H. Yagi
    • Organizer
      Solid State Materials and Devices
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 微細円孔が最密充填構造に配列されたモザイク状素子による非対称パワースプリッタ2023

    • Author(s)
      御手洗拓矢、藤澤剛、澤田祐甫、沖本拓也、八木英樹、藤原直樹
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mosaic-based power splitters with asymmetric splitting ratios designed on triangular lattice2023

    • Author(s)
      Y. Sawada, T. Fujisawa, T. Mitarai, T. Okimoto, H. Yagi, and N. Fujiwara
    • Organizer
      13th International Symposium on Photonics and Electronics Convergence
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication-tolerant, 2-mode, 4λ multiplexer based on Si waveguides for beyond Tbit/s optical Ethernet2023

    • Author(s)
      T. Fujisawa, and K. Saitoh
    • Organizer
      Optical Fiber Communication Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 波長2 mm帯疑似断熱結合器型2モード 3-dBパワースプリッタ2023

    • Author(s)
      村椿太一、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 3段縦続接続波長無依存カプラ型高トレランスモード合波器2023

    • Author(s)
      中村航大、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ベイズ最適化法を用いたモザイク状素子の設計技術2023

    • Author(s)
      藤澤剛、御手洗拓矢、沖本拓也、河野直哉、藤原直樹、澤田祐甫、村椿太一、佐藤孝憲、八木英樹、齊藤晋聖
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Compact power splitters with mosaic-based structure designed by Bayesian direct-binary-search method2022

    • Author(s)
      T. Mitarai, T. Fujisawa, T. Okimoto, N. Kono, N. Fujiwara, Y. Sawada, T. Muratsubaki, T. Sato, K. Saitoh, and H. Yagi
    • Organizer
      Optoelectronics and Communications Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cascaded Wavefront-Matching-Method Designed 6-Mode-Exchangers for MDL Management in MDM Transmission2022

    • Author(s)
      Y. Asama, T. Fujisawa, T. Sato, T. Mori, T. Sakamoto, R. Imada, Y. Yamashita, K. Nakajima, and K. Saitoh
    • Organizer
      Conference on Lasers and Electro-Optics Pacific-Rim 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] シリコン導波路型モード制御素子2022

    • Author(s)
      藤澤剛、齊藤晋聖
    • Organizer
      光通信インフラの飛躍的な高度化に関する特別研究専門委員会(EXAT)研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] ベイズ型直接2分探索法により設計した超小型モザイクパワースプリッタの試作2022

    • Author(s)
      藤澤剛、御手洗拓矢、沖本拓也、河野直哉、藤原直樹、澤田祐甫、村椿太一、佐藤孝憲、八木英樹、齊藤晋聖
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超広帯域台形テーパ非対称方向性結合器の設計2022

    • Author(s)
      落合真栄、藤澤剛、中村航大、澤田祐甫、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] モザイク構造に基づく波長2 mm帯小型2×2 3-dB結合器2022

    • Author(s)
      村椿太一、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] モザイク構造型ディスク共振器における透過率制御に関する検討2022

    • Author(s)
      塚本光基、村椿太一、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      令和4年度電気・情報関係学会北海道支部連合大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Silica-PLC based mode-dependent-loss equalizer for two LP mode transmission2022

    • Author(s)
      T. Fujisawa, T. Mori, J. Sakamoto, Y. Yamashita, T. Sakamoto, R. Imada, R. Ima, T. Sato, K. Watanabe, R. Kasahara, T. Hashimoto, K. Nakajima, and K. Saitoh
    • Organizer
      Optical Fiber Communication Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 波長無異存カプラ型Oバンド2モード合波器2022

    • Author(s)
      中村航大、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 2チップで構成されたWFM法設計6モード交換器によるMDL低減2022

    • Author(s)
      朝間友一、藤澤剛、佐藤孝憲、森崇嘉、坂本泰志、今田諒太、松井隆、中島和秀、齊藤晋聖
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Fabrication-Tolerant Four-Mode Waveguide Crossing Based on PhC-like Subwavelength Structures at 2 um2021

    • Author(s)
      T. Muratsubaki, T. Fujisawa, Y. Sawada, T. Sato, and K. Saitoh
    • Organizer
      Advanced Photonics Congress (APC)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Switchable Mode Converter for Four-Mode MDM System Assisted by Passive Mode Controlling Device Designed by Wavefront Matching Method2021

    • Author(s)
      Y. Sawada, T. Fujisawa, T. Sato, and K. Saitoh
    • Organizer
      Microoptics Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 製造トレランスの高いモザイク型2mm帯4モード交差導波路の設計2021

    • Author(s)
      村椿太一、藤澤剛、澤田祐甫、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会技術研究報告
    • Related Report
      2021 Annual Research Report
  • [Presentation] モザイク状素子の研究動向2021

    • Author(s)
      藤澤剛
    • Organizer
      2021年度第3回フォトニックデバイス・応用技術研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] CWDM4 wavelength multiplexer based on high-tolerance ADC with polarization multiplexing2021

    • Author(s)
      中村航大、藤澤剛、佐藤孝憲、齊藤晋聖
    • Organizer
      Photonic Device Workshop 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高製造トレランスのための直接二分探索法を用いた2mm帯4モード交差導波路の設計2021

    • Author(s)
      村椿太一、藤澤剛、澤田祐甫、佐藤孝憲、齊藤晋聖
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 4モードスクランブラと光ユニタリ変換器を用いた2LPモード合分波器の検討2021

    • Author(s)
      吉田康人、佐藤孝憲、藤澤剛、森崇嘉、坂本泰志、山下陽子、今田諒太、中島和秀、齊藤晋聖
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Proposal of PLC 10-mode-selective photonic lantern mode multiplexer2021

    • Author(s)
      H. Wang, Y. Sawada, T. Fujisawa, T. Sato, T. Mori, T. Sakamoto, Y. Yamashita, R. Imada, K. Nakajima, and K. Saitoh
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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