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Mode-exchange technology using volume holograms in mode-division multiplexing

Research Project

Project/Area Number 19K04366
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionHokkaido University

Principal Investigator

OKAMOTO ATSUSHI  北海道大学, 情報科学研究院, 准教授 (40224068)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords光通信工学 / ホログラム / 空間光変調器 / モード分割多重通信 / モード分割通信 / モード交換 / 光スイッチ / 空間モード
Outline of Research at the Start

本研究では,ファイバ中を多重化されて伝搬する複数の空間モードを直接交換することのできるモード交換機能(モード相互変換・モードスイッチ・モードクロスコネクト)を如何にして実現できるかについての答えを,多重体積ホログラムをベースとした独自の方法から検討し,先駆的なシステム構築に関する新知見を得ることを目的とする。本研究は,従来の波長選択スイッチに代わる空間モードでの自在なスイッチングエンジンを新規に提供するものである。

Outline of Final Research Achievements

A methodology for simultaneous spatial mode exchange by a single-chip hologram element was proposed and theoretically and experimentally investigated. A new method for reducing inter-mode crosstalk was established to improve the performance of the hologram element. Next, we showed that variable mode exchange is possible by adding a spatial light modulator, and developed a method to improve the performance by changing the signal to be displayed on the spatial light modulator. These results have high academic significance in that they present and verify a new method of optical system configuration. They also have high social significance in that they contribute to the advancement of optical communication technology.

Academic Significance and Societal Importance of the Research Achievements

モード交換素子の性能評価指数であるモード間クロストークを改善する新たな方法として、信号光に位相板による空間変調を加えて、強度分布を変化させる方法を提案した。結果として、モード間クロストークが大きく改善されることを示した点に大きな意義がある。また、ホログラム素子と空間光変調器の組み合わせによって、可変的なモード交換が可能であることを示したことは、重要な実験結果であり、学術的な意義が高い。さらに、これらの成果は、光通信技術の高度化に貢献する点で社会的な意義が高い。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Spatial-light-modulator-based optical-fiber joint switch for few-mode multicore fibers2021

    • Author(s)
      Shuanglu Zhang, Atsushi Okamoto, Yuta Abe, Ryo Watanabe, Akihisa Tomita, Daiki Soma, Yuta Wakayama
    • Journal Title

      Optics Express

      Volume: 29 Issue: 24 Pages: 39096-39106

    • DOI

      10.1364/oe.443033

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spatial mode exchange technique using volume holograms with a random optical diffuser for reduction of crosstalk2021

    • Author(s)
      Shuanglu Zhang, Atsushi Okamoto, Taijun Shiba, Hotaka Hayashi, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Yuta Goto, Naoya Wada
    • Journal Title

      Optical Review

      Volume: 28 Issue: 2 Pages: 181-189

    • DOI

      10.1007/s10043-021-00648-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mode-selective switch for ROADM using volume holograms and spatial light modulator2020

    • Author(s)
      Hotaka Hayashi, Atsushi Okamoto, Tomohiro Maeda, Taijun Shiba, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Yuta Goto, and Naoya Wada
    • Journal Title

      SPIE Photonics West 2020 (PW2020)

      Volume: 11309 Pages: 7-7

    • DOI

      10.1117/12.2544685

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 体積ホログラムの記録時における後露光時間の変化が回折効率に与える影響2022

    • Author(s)
      黒田裕也
    • Organizer
      映像情報メディア学会 マルチメディアストレージ研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Improvement in diffraction efficiency of volume holographic mode de-multiplexer with dual wavelength method by using thick medium2021

    • Author(s)
      Yuya Kuroda
    • Organizer
      31th International Symposium on Imaging, Sensing, and Optical Memory 2021 (ISOM’21)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Complex Amplitude Control Technology for Mode-Multiplexing Optical Communication2021

    • Author(s)
      Atsushi Okamoto
    • Organizer
      12th International Conference on Optics-photonics Design & Fabrication
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 体積ホログラム分波器における補償波面の解像度に対する特性2021

    • Author(s)
      林 穂高
    • Organizer
      光通信システム研究会1月研究会(OCS研究会)
    • Related Report
      2020 Research-status Report
  • [Presentation] Improving the reconstruction quality of spatial mode exchange technique by adjusting the diffusion angle of diffuser2020

    • Author(s)
      Zhang Shuanglu
    • Organizer
      30th International Symposium on Imaging, Sensing, and Optical Memory 2020 (ISOM’20)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 体積ホログラム分波器の出力信号の波面補償方法2020

    • Author(s)
      林 穂高
    • Organizer
      光通信システム研究会11月研究会(OCS研究会)
    • Related Report
      2020 Research-status Report
  • [Presentation] Spatial Mode Exchange Technique Using Volume Hologram with a Phase Plate2019

    • Author(s)
      Shuanglu Zhang
    • Organizer
      29th International Symposium on Imaging, Sensing, and Optical Memory 2019 (ISOM’19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 体積ホログラムを用いたモード選択スイッチの基礎実験2019

    • Author(s)
      林 穂高
    • Organizer
      令和元年度電気・情報関係学会北海道支部連合大会
    • Related Report
      2019 Research-status Report
  • [Patent(Industrial Property Rights)] モード選択スイッチ2019

    • Inventor(s)
      岡本 淳,前田 智弘,柴 泰純,高畠 武敏,品田 聡,和田 尚哉
    • Industrial Property Rights Holder
      北海道大学、情報通信研究機構、株式会社オプトクエスト
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-125212
    • Filing Date
      2019
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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