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Maru Koichi

  • Faculty of Engineering and Design
  • Department of Engineering and Design
  • Graduate School of Science for Creative Emergence
  • Division of Science for Creative Emergence
  • Professor
Last Updated :2026/06/24

Researcher Information

Degree

  • Bachelor of Engineering（Tokyo Institute of Technology）
  • Master of Engineering（Tokyo Institute of Technology）
  • Doctor of Engineering（Tokyo Institute of Technology）

J-Global ID

Research Interests

  • sensing   telecommunication   optics   optical devices   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Measurement engineering
  • Nanotechnology/Materials / Optical engineering and photonics

Academic & Professional Experience

  • 2018/04 - Today  香川大学創造工学部, 教授
  • 2013/04 - Today  四国医療福祉専門学校, 非常勤講師
  • 2010/10 - 2018/03  香川大学工学部, 准教授
  • 2008/07 - 2010/09  群馬大学大学院工学研究科, 助教
  • 1997/04 - 2008/06  Hitachi Cable, Ltd.
  • 2002/09 - 2007/03  財団法人光産業技術振興協会

Education

  • 2005/04 - 2007/09  東京工業大学大学院  理工学研究科  電気電子工学専攻
  • 1995/04 - 1997/03  東京工業大学大学院  理工学研究科  電子物理工学専攻
  • 1991/04 - 1995/03  Tokyo Institute of Technology  Faculty of Engineering  電気・電子工学科

Association Memberships

  • OSA   IEEE   応用物理学会   

Published Papers

Books etc

  • “Cross-sectional velocity distribution measurement based on fiber-optic differential laser Doppler velocimetry,” in Advances in imaging and sensing, pp. 121-140
    CRC Press 2016
  • "Laser Doppler velocimetry technology for integration and directional discrimination," in Optical imaging devices: new technologies and applications, pp. 189-206
    CRC Press 2015
  • “Laser Doppler velocimetry technology for integration and directional discrimination,” in Smart sensors for industrial applications, pp. 81-95
    CRC Press 2013
  • “Guided-wave optical components for DWDM transmission systems using ADMs,” in The Emerging Optical Network, Part IV: DWDM and optical technology advances, pp. 175-186
    Intl. Engineering Consortium 2001

Conference Activities & Talks

  • Simultaneous measurement of 3D velocity distribution using 3D spatial encoding  [Not invited]
    Mohamad Ikram Zharfan bin Mohmad Asri; Haruto Yamaji; Shota Eguchi; Koichi Maru
    令和5年度電気・電子・情報関係学会四国支部連合大会  2023/09  高松  電子情報通信学会
  • Nb2O5/SiO2多重反射層上グレーティングカプラのための理論的検討
    齊藤拓人; 端山喜紀; 中津原克己; 武田貴希; 丸浩一
    Photonic Device Workshop 2022  2022/12
  • 多重反射層上に形成するグレーティングカプラのための基礎検討
    齊藤拓人; 中津原克己; 武田貴希; 端山喜紀; 丸浩一
    光エレクトロニクス（OPE）研究会 2022年度6月研究会  2022/06
  • 集積型レーザドップラー速度計に用いるNb2O5導波路グレーティングカプラの設計
    横田敦也; 土居秀人; 丸浩一
    第4回機能性材料を用いた微細構造デバイス研究グループ研究発表会  2018/12
  • 速度分布計測用Si集積型レーザドップラープローブの光学系設計  [Not invited]
    第3回機能性材料を用いた微細構造デバイス研究グループ研究発表会  2017
  • 非メカニカルレーザドップラー断面速度分布計測技術  [Not invited]
    2016年電子情報通信学会総合大会  2016
  • 速度分布計測用集積プローブに用いるグレーティングカプラの設計  [Not invited]
    平成28年度電気関係学会四国支部連合大会  2016
  • 2次元断面速度分布計測用レーザドップラー速度計の測定点稠密化  [Not invited]
    平成28年度電気関係学会四国支部連合大会  2016
  • 速度分布計測用Si集積型プローブに用いるグレーティングカプラの設計  [Not invited]
    第2回機能性材料を用いた微細構造デバイス研究グループ研究発表会  2016
  • 測定点稠密化レーザドップラー速度計を用いた二次元速度分布測定  [Not invited]
    第2回機能性材料を用いた微細構造デバイス研究グループ研究発表会  2016
  • レーザドップラー断面速度分布計測用小型プローブの試作  [Not invited]
    第76回応用物理学会秋季学術講演会  2015
  • ランダム位相誤差存在下でのアレイ導波路回折格子を用いた光合分波器の特性解析  [Not invited]
    光エレクトロニクス研究会（OPE）  2015
  • Review of the e-JIKEI Network: Security camera system for privacy protection and community safety  [Not invited]
    3rd Intl Conf. on Informatics, Electronics & Vision (ICIEV)  2014
  • 空間エンコーディングされた測定点の非メカニカル走査によるレーザドップラー断面速度分布計測  [Not invited]
    第75回応用物理学会秋季学術講演会  2014
  • 波長可変レーザとファイバアレイを用いた2次元断面走査型レーザドップラー速度計  [Not invited]
    2013年第60回応用物理学会春季学術講演会  2013
  • 集積化レーザドップラー速度計に用いる導波路―空間結合構造  [Not invited]
    2013年度応用物理・物理系学会中国四国支部合同学術講演会  2013
  • 速度方向識別可能な走査型レーザドップラー速度計の検討  [Not invited]
    2013年度応用物理・物理系学会中国四国支部合同学術講演会  2013
  • Shopping street safety using all-in-one-type security cameras  [Not invited]
    The 1st IEEE/IIAE International Conference on Intelligent Systems and Image Processing 2013  2013
  • セロダイン変調を用いたレーザドップラー速度計  [Not invited]
    平成25年度電気関係学会四国支部連合大会  2013
  • 移動機構不要な走査型レーザドップラー速度計の速度方向識別化  [Not invited]
    2012年秋季第73回応用物理学会学術講演会  2012
  • 波長変化による走査型レーザドップラー速度計における横方向走査方法の検討  [Not invited]
    平成24年度電気関係学会四国支部連合大会  2012
  • Laser Doppler velocimetry with small wavelength sensitivity using planar lightwave circuit  [Not invited]
    3rd International Conference on Precision Instrumentation and Measurement (CPIM2011)  2011
  • 波長変化を利用した光軸方向ビーム走査型レーザドップラー速度計  [Not invited]
    2011年秋季第72回応用物理学会学術講演会  2011
  • 浮上質量法を用いた高精度曲げ評価装置とその小型化  [Not invited]
    2009年春季第56回応用物理学関係連合講演会  2009
  • 微小重力環境下で使用する質量測定器  [Not invited]
    2009年春季第56回応用物理学関係連合講演会  2009
  • Frequency estimation method for measuring mass under microgravity conditions  [Not invited]
    The 27th International Symposium on Space Technology and Science (27th ISTS)  2009
  • Frequency estimation method for measuring time-varying single frequency from digitized waveform  [Not invited]
    2009
  • Frequency estimation method for measuring mass under microgravity conditions  [Not invited]
    The 27th International Symposium on Space Technology and Science (27th ISTS)  2009
  • Frequency estimation method for measuring time-varying single frequency from digitized waveform  [Not invited]
    2009
  • Precision and compact dynamic bending tester  [Not invited]
    2008 International Conference of Computer and Electrical Engineering (ICCEE 2008)  2008
  • The Levitation Mass Method (LMM): A precision mechanical measurement method  [Not invited]
    International Workshop and Symposium Science Technology 2008 (I-SEEC2008)  2008
  • Precision and compact dynamic bending tester  [Not invited]
    2008 International Conference of Computer and Electrical Engineering (ICCEE 2008)  2008
  • The Levitation Mass Method (LMM): A precision mechanical measurement method  [Not invited]
    International Workshop and Symposium Science Technology 2008 (I-SEEC2008)  2008
  • 石英系超小型アサーマルAWGの開発  [Not invited]
    2007秋期応用物理学会シンポジウム「フォトニックネットワークに向けた中核光デバイス群の開発と光ラベルスイッチングノードプロトタイプへの応用」  2007
  • Super-high-Delta silica-based flat-passband filter using AWG and cascaded Mach-Zehnder interferometers  [Not invited]
    12th Optoelectronics and Communications Conf./16th International Conf. on Integrated Optics and Optical Fiber Communication (OECC/IOOC 2007)  2007
  • Spot size converter with vertically tapered waveguide core fabricated by sputter etching  [Not invited]
    20th International Microprocesses and Nanotechnology Conference (MNC 2007)  2007
  • Super-high-Delta silica-based flat-passband filter using AWG and cascaded Mach-Zehnder interferometers  [Not invited]
    12th Optoelectronics and Communications Conf./16th International Conf. on Integrated Optics and Optical Fiber Communication (OECC/IOOC 2007)  2007
  • Spot size converter with vertically tapered waveguide core fabricated by sputter etching  [Not invited]
    20th International Microprocesses and Nanotechnology Conference (MNC 2007)  2007
  • 多入力アレイ導波路型合分波器の設計法と広帯域化フィルタへの応用  [Not invited]
    東京工業大学21世紀COEプログラム「フォトニクスナノデバイス集積工学」最終成果報告シンポジウム  2006
  • 多入力アレイ導波路型合分波器と多段マッハ・ツェンダ干渉計を利用した広帯域フィルタの設計  [Not invited]
    電子情報通信学会技術研究報告 (OME, OPE)  2006
  • Flat-passband arrayed waveguide grating employing cascaded Mach-Zehnder interferometers  [Not invited]
    11th Optoelectronics and Communications Conf. (OECC 2006)  2006
  • Flat-passband arrayed waveguide grating employing cascaded Mach-Zehnder interferometers  [Not invited]
    11th Optoelectronics and Communications Conf. (OECC 2006)  2006
  • 高Δ石英系PLCの低損失化  [Not invited]
    2005年秋季応用物理学会学術講演会  2005
  • 超高Δ石英導波路を用いた小型アサーマルAWG  [Not invited]
    2005年電子情報通信学会ソサイエティ大会  2005
  • 超高ΔPLC用スポットサイズ変換器の設計指針  [Not invited]
    2004年電子情報通信学会ソサイエティ大会  2005
  • 2.5%-Delta athermal arrayed-waveguide grating multi/demultiplexer with low trench diffraction loss  [Not invited]
    11th Microoptics Conf. (MOC '05)  2005
  • 2.5%-Delta athermal arrayed-waveguide grating multi/demultiplexer with low trench diffraction loss  [Not invited]
    11th Microoptics Conf. (MOC '05)  2005
  • 2.5%-Δ超小型アレイ導波路型光合分波器  [Not invited]
    2004年電子情報通信学会総合大会  2004
  • 2.5%-Delta silica-based arrayed-waveguide grating multi/demultiplexer with low crosstalk  [Not invited]
    9th Optoelectronics and Communications Conf./3rd International Conf. on Optical Internet (OECC/COIN 2004)  2004
  • 2.5%-Delta silica-based arrayed-waveguide grating multi/demultiplexer with low crosstalk  [Not invited]
    9th Optoelectronics and Communications Conf./3rd International Conf. on Optical Internet (OECC/COIN 2004)  2004
  • CWDM用集積光導波路の検討  [Not invited]
    2003年電子情報通信学会ソサイエティ大会  2003
  • 超高Δ導波路用スポットサイズ変換器  [Not invited]
    2003年電子情報通信学会総合大会  2003
  • 分割導波路型スポットサイズ変換器の高性能化  [Not invited]
    2003年電子情報通信学会総合大会  2003
  • Novel spot size converter for super high Delta waveguides  [Not invited]
    Conf. on Lasers and Electro-Optics/Quantum Electronics & Laser Science Conf. (CLEO/QELS 2003)  2003
  • High resolution dynamic gain equalizer using super-high-Delta planar lightwave circuit technology  [Not invited]
    Optical Fiber Communication Conf. (OFC 2003)  2003
  • Novel spot size converter for super high Delta waveguides  [Not invited]
    Conf. on Lasers and Electro-Optics/Quantum Electronics & Laser Science Conf. (CLEO/QELS 2003)  2003
  • High resolution dynamic gain equalizer using super-high-Delta planar lightwave circuit technology  [Not invited]
    Optical Fiber Communication Conf. (OFC 2003)  2003
  • Ta2O5/SiO2系3次元フォトニック結晶フィルタを用いたAWGの低クロストーク化  [Not invited]
    2002年電子情報通信学会ソサイエティ大会  2002
  • インターリーブWDM用AWG型合分波器  [Not invited]
    2002年電子情報通信学会ソサイエティ大会  2002
  • アレイ導波路型光合分波器を用いたダイナミック利得等化器  [Not invited]
    2002年電子情報通信学会ソサイエティ大会  2002
  • 温度無依存型低損失AWG  [Not invited]
    2002年電子情報通信学会総合大会  2002
  • アレイ導波路型光合分波器とLiNbO3位相シフタを利用したダイナミック利得等化器  [Not invited]
    2002年電子情報通信学会総合大会  2002
  • アレイ導波路型光合分波器の低損失・温度無依存化  [Not invited]
    電子情報通信学会技術研究報告 (OPE)  2002
  • Planar wave-guide interleaving filters  [Not invited]
    15th Annual Meeting of IEEE LEOS  2002
  • WDM filtering and packaging technologies using planar lightwave circuits  [Not invited]
    15th Annual Meeting of IEEE LEOS  2002
  • Recent progress in optical filter technologies (AWG and wavelength splitter)  [Not invited]
    7th Optoelectronics and Communications Conf. (OECC 2002)  2002
  • Planar wave-guide interleaving filters  [Not invited]
    15th Annual Meeting of IEEE LEOS  2002
  • WDM filtering and packaging technologies using planar lightwave circuits  [Not invited]
    15th Annual Meeting of IEEE LEOS  2002
  • Recent progress in optical filter technologies (AWG and wavelength splitter)  [Not invited]
    7th Optoelectronics and Communications Conf. (OECC 2002)  2002
  • アレイ導波路型光合分波器を利用したダイナミック利得等化器  [Not invited]
    2001年電子情報通信学会ソサイエティ大会  2001
  • WDM用導波路型光デバイスの開発  [Not invited]
    第63回ニューガラスフォーラム若手懇談会  2001
  • Development of 128-channel 100 GHz arrayed waveguide grating with pitch conversion waveguide  [Not invited]
    Pacific Rim Conf. on Lasers and Electro-Optics (CLEO/Pacific Rim 2001)  2001
  • Passive optical components for next generation DWDM systems  [Not invited]
    4th International Convention on Undersea Communications (SubOptic 2001)  2001
  • Development of 128-channel 100 GHz arrayed waveguide grating with pitch conversion waveguide  [Not invited]
    Pacific Rim Conf. on Lasers and Electro-Optics (CLEO/Pacific Rim 2001)  2001
  • Passive optical components for next generation DWDM systems  [Not invited]
    4th International Convention on Undersea Communications (SubOptic 2001)  2001
  • 熱光学効果を用いた可変光アテネータの検討  [Not invited]
    2000年電子情報通信学会ソサイエティ大会  2000
  • 温度無依存アレイ導波路格子型光合分波器  [Not invited]
    2000年電子情報通信学会総合大会  2000
  • High reliable athermal arrayed-waveguide gratings  [Not invited]
    5th Optoelectronics and Communications Conf. (OECC 2000)  2000
  • Impact of phase error on chromatic dispersion in arrayed waveguide gratings  [Not invited]
    5th Optoelectronics and Communications Conf. (OECC 2000)  2000
  • Athermal and center wavelength adjustable arrayed-waveguide grating  [Not invited]
    Optical Fiber Communication Conf. (OFC 2000)  2000
  • High reliable athermal arrayed-waveguide gratings  [Not invited]
    5th Optoelectronics and Communications Conf. (OECC 2000)  2000
  • Impact of phase error on chromatic dispersion in arrayed waveguide gratings  [Not invited]
    5th Optoelectronics and Communications Conf. (OECC 2000)  2000
  • Athermal and center wavelength adjustable arrayed-waveguide grating  [Not invited]
    Optical Fiber Communication Conf. (OFC 2000)  2000
  • InP-AWGとPDアレイをハイブリッド集積したDWDMモジュール  [Not invited]
    1999年電子情報通信学会ソサイエティ大会  1999
  • 1.5%-Delta石英系アレイ導波路格子型光合分波器  [Not invited]
    1999年電子情報通信学会ソサイエティ大会  1999
  • ノンドープSiO2クラッドを用いた偏波無依存型AWG  [Not invited]
    1999年電子情報通信学会ソサイエティ大会  1999
  • InP 16チャネルアレイ導波路格子分波器  [Not invited]
    1999年電子情報通信学会総合大会  1999
  • アレイ導波路格子の位相誤差に関する検討  [Not invited]
    1999年電子情報通信学会総合大会  1999
  • アレイ導波路格子の振幅・位相誤差の検討  [Not invited]
    電子情報通信学会技術研究報告 (OPE)  1999
  • Influence of statistical phase error on AWG spectral response  [Not invited]
    1999 International Conf. on Solid State Deices and Materials (SSDM '99)  1999
  • Influence of statistical phase error on AWG spectral response  [Not invited]
    1999 International Conf. on Solid State Deices and Materials (SSDM '99)  1999
  • アレイ導波路格子型合分波器の低損失化の検討  [Not invited]
    1998年電子情報通信学会ソサイエティ大会  1998
  • 導波路型分散補償器  [Not invited]
    1998年電子情報通信学会ソサイエティ大会  1998
  • 波長ルーティング機能を有する32ch AWGの検討  [Not invited]
    1998
  • Low loss and wide passband arrayed waveguide grating demultiplexer  [Not invited]
    24th European Conf. on Optical Communication (ECOC '98)  1998
  • 16x32 AWG with cyclic-frequency response  [Not invited]
    3rd Optoelectronics and Communications Conf. (OECC '98)  1998
  • Low loss and wide passband arrayed waveguide grating demultiplexer  [Not invited]
    24th European Conf. on Optical Communication (ECOC '98)  1998
  • 16x32 AWG with cyclic-frequency response  [Not invited]
    3rd Optoelectronics and Communications Conf. (OECC '98)  1998
  • アレイ導波路型グレーティングの振幅・位相測定  [Not invited]
    1997年電子情報通信学会ソサイエティ大会  1997
  • H2雰囲気アニーリングによる磁気光学結晶の光吸収損失の増加  [Not invited]
    1997
  • 光アイソレータ集積化のためのレーザウェーハのエッチングプロセスの検討  [Not invited]
    1997年電子情報通信学会総合大会  1997
  • InPとGd3Ga5O12のダイレクトボンディングの検討  [Not invited]
    1996年電子情報通信学会総合大会  1996
  • InPとガーネットのダイレクトボンディングの検討  [Not invited]
    電子情報通信学会技術研究報告 (OPE)  1996
  • Direct bonding between laser wafers and magneto-optic waveguides  [Not invited]
    Conference on Lasers and Electro-Optics (CLEO) Europe 1996  1996
  • Direct bonding between laser wafers and magneto-optic waveguides  [Not invited]
    Conference on Lasers and Electro-Optics (CLEO) Europe 1996  1996
  • 磁気光学材料と半導体のダイレクトボンディング  [Not invited]
    日本応用磁気学会学術講演  1995
  • MOCVD法によるGd3Ga5O12基板上GaInSbの成長における減圧の影響  [Not invited]
    応用物理学関係連合講演会  1995
  • Direct bonding for the integration of optical isolator with III-V semiconductors  [Not invited]
    Pacific Rim Conference on Lasers and Electro-Optics '95 (Cleo-Pacific Rim '95)  1995
  • Direct bonding for the integration of optical isolator with III-V semiconductors  [Not invited]
    Pacific Rim Conference on Lasers and Electro-Optics '95 (Cleo-Pacific Rim '95)  1995
  • Gd3Ga5O12とIII-V族化合物半導体のダイレクトボンディング  [Not invited]
    電子情報通信学会技術研究報告 (OPE)  1994

MISC

  • 空間エンコード化と波長走査を組み合わせた3次元速度分布計測方法
    山地陽翔; S. N. A. B. Abd Ghafar; 丸浩一  令和3年度SICE四国支部学術講演会  PS1-03  2021
  • C-3-24 Nonmechanical Laser Doppler Cross-sectional Velocimetry
    Maru Koichi  Proceedings of the IEICE General Conference  2016-  (1)  162  -162  2016/03
  • Development of security camera with privacy protection and, social experiment using the security camera with privacy protection
    S. Kato; A. Takita; N. Yoshiura; N. Ohta; 丸浩一; H. Ueda; H. Matsuda; Y. Fujii  Proc. 4th IIAE International Conference on Industrial Application Engineering 2016  356-359  2016/03  [Refereed]
  • Performance analysis of filters using arrayed waveguide gratings under the influence of random phase error
    鈴木 敦; 丸 浩一  電子情報通信学会技術研究報告 = IEICE technical report : 信学技報  115-  (332)  13  -18  2015/11
  • Directional discrimination using optical serrodyne modulation for non-mechanical scanning laser Doppler velocimeter
    丸浩一; K. Watanabe  Proc. 9th International Conference on Optics-photonics Design and Fabrication (ODF’14)  2014/02  [Refereed]
  • Koichi Maru; Kento Watanabe  INTERFEROMETRY XVII: TECHNIQUES AND ANALYSIS  9203-  920314 (7 pages)  2014  [Refereed]
  • Dispersion model for AWG-based filters under the influence of random phase errors
    丸浩一  Proc. CLEO-PR & OECC/PS 2013  2013/07  [Refereed]
  • 非メカニカル走査型レーザドップラー速度計
    丸浩一  光アライアンス  24-  (6)  12-16  -16  2013/06
  • 須崎嘉文; 牧野和史; 山口堅三; 丸浩一; 岩田弘; 今岡功  精密工学会大会学術講演会講演論文集  2013-  (0)  ROMBUNNO.K25  -696  2013/02
  • 光ファイバーFBG素子を用いた電流センサの研究
    岩田弘; 北山温海; 今岡功; 須崎嘉文; 丸浩一; 山口堅三  日本機械学会中国四国支部総会・講演会講演論文集(CD-ROM)  51st-  ROMBUNNO.702  2013
  • Takahiro Hata; Koichi Maru  2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)  2013  [Refereed]
  • Non-mechanical axial scanning laser Doppler velocimeter using single diffraction grating
    丸浩一; T. Fujiwara; T. Hata  Proc. 8th International Conference on Optics-Photonics Design and Fabrication (ODF’12)  35-36  2012/07  [Refereed]
  • FBG電流センサーの開発
    牧野和史; 浅田将人; 安藤秀一; 丸浩一; 山口堅三; 須崎嘉文; 岩田弘; 今岡功  日本材料学会四国支部学術講演会講演論文集  10th-  31  -32  2012
  • Y. Fujii; K. Maru  Experimental Techniques,  Vol.35-  (No.3)  15  -20  2011
  • J. Ozawa; K. Maru; K. Kobayashi; Y. Fujii  Key Engineering Materials  Vols. 459-  183  -189  2011
  • 超高Δ石英系プレーナ光波回路（PLC）の開発動向
    丸浩一  工業材料  58-  (3)  25-28  -28  2010/03
  • Applied Mechanics and Materials: Editorial messages
    Yusaku Fujii; Koichi Maru  Applied Mechanics and Materials  36-  2010
  • Y. Fujii; K. Maru; T. Jin  Precision Eng.  34-  (4)  802  -806  2010
  • T. Jin; H. Jia; W. Hou; R. Yamamoto; N. Nagai; Y. Fujii; K. Maru; N. Ohta; K. Shimada  Chinese Optics Letters  8-  (6)  601  -605  2010
  • Y.Fujii; K. Shimada; K. Maru; M. Yokota; S. Hashimoto; N. Nagai; Y. Sugita  Trans. Jpn. Soc. Aeronaut. Space Sci. Space Technol. Jpn  7-  (26)  Th_1  -Th_6  2010
  • T. Jin; H. Hoshino; Y. Fujii; J. Hongzhi; K. Maru; H. Wenmei  Procedia - Social and Behavioral Sciences  2-  (1)  120  -124  2010
  • M. Sonoda; K. Maru; K. Kobayashi; M. Salehuddin; B. Sufian; Y. Sugita; R. Sakurai; Y. Fujii  Procedia - Social and Behavioral Sciences  2-  (1)  100  -104  2010
  • Y. Fujii; K. Shimada; K. Maru  Microgravity Science and Technology  22-  (1)  115  -121  2010
  • Y. Fujii; K. Maru  Tribology Transactions  53-  (2)  169  -173  2010
  • Y. Fujii; K. Maru; T. Jin; P. Yupapin; S. Mitatha  Sensors  Vol.10-  (No.11)  10069  -10080  2010
  • Y. Fujii; K. Maru; T. Jin; T. Yamaguchi  Applied Mechanics and Materials  Vol.36-  41  -51  2010
  • Y. Fujii; K. Maru; K. Shimada; T. Jin; W. Thornton  Applied Mechanics and Materials  Vol.36-  31  -40  2010
  • Y. Fujii; K. Shimada; K. Maru; J. Ozawa; R. Lu  Sensors  Vol.10-  (No.10)  9155-9162,  2010
  • Koichi Maru; Yusaku Fujii; Yoichi Sugita; Naoya Ohta; Noriaki Yoshiura; Hiroshi Ueda; Shinya Shiraki  1ST INTERNATIONAL CONFERENCE ON SECURITY CAMERA NETWORK, PRIVACY PROTECTION AND COMMUNITY SAFETY 2009  2-  (1)  88  -94  2010  [Refereed]
  • Material testing method using small forces based on the Levitation Mass Method (LMM),
    Y. Fujii; K. Maru  Journal of Materials Science and Engineering  3-  (6)  9  -16  2009
  • Y. Fujii; K. Maru; D. W. Shu; B. Gu; T. Yamaguchi; R.S. Lu; T. Jutanggoon; P. P. Yupapin  Physics Procedia  12-  (1)  5  -11  2009
  • B. Gu; D. W. Shu; Y. Fujii; K. Maru; B. J. Shi; Y. Liu  Physics Procedia,  12-  (1)  13  -17  2009
  • Z. Zhao; Q. Xu; W. Hou; Y. Fujii; K. Maru  Physics Procedia  1.2-  (1)  87  -91  2009
  • Koichi Maru; Yusaku Fujii; Shulian Zhang; Wenmei Hou  FRONTIER RESEARCH IN NANOSCALE SCIENCE AND TECHNOLOGY  2-  (1)  39  -44  2009
  • Koichi Maru; Yusaku Fujii; Tomio Obokata; Tsuneaki Ishima; Preecha Yupapin; Nithitroth Pornsuwancharoen; Thanaprasert Juthanggoon  FRONTIER RESEARCH IN NANOSCALE SCIENCE AND TECHNOLOGY  2-  (1)  45  -51  2009
  • Koichi Maru; Yusaku Fujii; Kazuhito Shimada  FRONTIER RESEARCH IN NANOSCALE SCIENCE AND TECHNOLOGY  2-  (1)  59  -65  2009
  • Super-high-Δsilica-based flat-passband filter using AWG and cascaded Mach-Zehnder interferometers
    MARU K.  Proc. 12th Optoelectronics and Communications Conf./16th International Conf. on Integrated Optics and Optical Fiber Communication (OECC/IOOC 2007)  2007
  • Flat-passband multi/demultiplexer using multi-input arrayed waveguide grating and cascaded Mach-Zehnder interferometers
    MARU Koichi; MIZUMOTO Tetsuya; UETSUKA Hisato  IEICE technical report  106-  (347)  41  -46  2006/11
  • C-3-85 Compact arrayed waveguide grating using super-high-Δ silica-based waveguides
    Maru K.; Abe Y.; Ishikawa H.; Ito M.; Himi S.; Uetsuka H.; Mizumoto T.  Proceedings of the Society Conference of IEICE  2005-  (1)  229  -229  2005/09
  • Study on integrated optical waveguide for CWDM
    Hori A.; Ibaragi O.; Komano H.; Maru K.  Proceedings of the Society Conference of IEICE  2003-  (1)  141  -141  2003/09
  • Dynamic gain equalizer using arrayed-waveguide grating multi/demultiplexer
    Maru K.; Chiba T.; Tanaka K.; Uetsuka H.  Proceedings of the Society Conference of IEICE  2002-  (1)  144  -144  2002/08
  • Loss reduction and athermalization of arrayed-waveguide grating multi/demultiplexer
    MARU Koichi; MATSUI Kensuke; ISHIKAWA Hiroshi; CHIBA Takafumi; SATO Shinobu; OKAWA Masahiro; UETSUKA Hisato  Technical report of IEICE. OPE  102-  (88)  31  -34  2002/05
  • AWG based multi/demultiplexers for interleaved WDM
    Ciba T.; Maru K.; Uetsuka H.  Proceedings of the Society Conference of IEICE  162  -162  2002
  • Athermal and center wavelength adjustable arrayed-waveguide grating
    MARU K.  OFC 2000 Tech. Dig.  2000
  • Study of Amplitude and Phase Errors in Arrayed-Waveguide Grating
    MARU Koichi; OKAWA Masahiro; UETSUKA Hisato; OKANO Hiroaki  Technical report of IEICE. OPE  99-  (39)  45  -50  1999/05
  • Study of phase errors in arrayed-waveguide grating
    Maru K.; Okawa M.; Uetsuka H.; Okano H.  Proceedings of the IEICE General Conference  1999-  (1)  274  -274  1999/03
  • Dispersion Equalizer with Planar Lightwave Circuits
    Uetsuka H.; Arai H.; Ohkawa M.; Maru K.  Proceedings of the Society Conference of IEICE  1998-  (1)  217  -217  1998/09
  • Amplitude and Phase of Arrayed Waveguide Grating
    Uetsuka H.; Arai H.; Ohkawa M.; Maru K.  Proceedings of the Society Conference of IEICE  1997-  (1)  227  -227  1997/08
  • Wafer etching process for integration of optical isolator
    Maru Koichi; Yokoi Hideki; Mizumoto Tetsuya; Koyama Tetsuya; Naito Yoshiyuki  Proceedings of the IEICE General Conference  1997-  (1)  284  -284  1997/03
  • Optical absorption loss increase of magnetooptic materials caused by annealing in H_2 ambient
    Yokoi Hideki; Mizumoto Tetsuya; Maru Koichi; Hayase Yuichiro; Naito Yoshiyuki  Proceedings of the IEICE General Conference  1997-  (1)  285  -285  1997/03
  • Investigation of direct bonding between InP and Gd_3Ga_5O_<12>
    Yokoi Hideki; Mizumoto Tetsuya; Maru Koichi; Fuke Nobutaka; Naito Yoshiyuki  Proceedings of the IEICE General Conference  1996-  (1)  202  -202  1996/03
  • A study of direct bonding between InP and garnets.
    横井秀樹; 水本哲弥; 丸浩一; 福家伸高; 内藤喜之  電子情報通信学会技術研究報告  95-  (519(OPE95 135-145))  61  -66  1996/02
  • Direct bonding between laser wafers and magneto-optic waveguides
    Hideki Yokoi; Tetsuya Mizumoto; Koichi Maru; Yoshiyuki Naito  Conference on Lasers and Electro-Optics Europe - Technical Digest  342  1996/01
  • Direct bonding of magnetooptic material and semiconductor
    MIZUMOTO T.; TOTOKI M.; MARU K.; NAITO Y.  日本応用磁気学会学術講演概要集 = Digest of ... annual conference on magnetics in Japan  19-  327  -a-327-b  1995/09
  • Demonstration of Direct Bonding between Gd_3Ga_5O_12> and III-V Compound Semiconductor
    Totoki Machiko; Mizumoto Tetsuya; Maru Kouichi; Naito Yoshiyuki  Technical report of IEICE. OPE  94-  (284)  37  -42  1994/10

Industrial Property Rights

  • Array waveguide grating and method of manufacture thereof
    Patent No. 2,362,653
  • スターカプラ及び光波長合分波器
    特許第3931835号
  • 光回路の特性測定方法およびその装置
    特許第3837965号
  • 熱光学効果型光アテネータ
    特許第3835205号
  • 光波長ルーティング装置
    特許第3724770号
  • 光波長合分波器
    特許第3498650号
  • 光波長合分波器
    特許第3509649号
  • Optical wavelength routing device
    Patent No. 6317534
  • Array waveguide grating and method of manufacture thereof
    Patent No. 6556749
  • Optical wavelength multiplexer/demultiplexer
    Patent No. 6549696
  • 光波長合分波器
    特許第3931834号
  • Optical wavelength multiplexer/demultiplexer
    Patent No. 6069990
  • 光波長合分波器
    特許第2861996号
  • Array waveguide grating and method of manufacture thereof
    Patent No. 2,362,653
  • Optical wavelength routing device
    Patent No. 6317534
  • Array waveguide grating and method of manufacture thereof
    Patent No. 6556749
  • Optical wavelength multiplexer/demultiplexer
    Patent No. 6549696
  • Optical wavelength multiplexer/demultiplexer
    Patent No. 6069990

Awards & Honors

  • 2009 Best Paper Award of SPC 2009
     JPN
  • 2007 Best Paper Award of 12th Optoelectronics and Communications Conf./16th International Conf. on Integrated Optics and Optical Fiber Communication (OECC/IOOC 2007)

Research Grants & Projects

  • 光空間エンコード化速度分布同時計測技術の開発とマイクロ流路計測用デバイスへの展開
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2022/04 -2025/03 
    Author : 丸 浩一
     
    申請者らは，光を用いた非侵襲な速度分布計測技術として，精密な位置情報取得を可能とする光空間エンコード化を利用した差動型レーザドップラー速度計測技術を開発してきた．本研究では，光空間エンコード化のコンセプトを発展させ，速度分布の同時計測が可能な新たな3次元空間速度分布計測方法を確立するための技術を開発するとともに，マイクロ流路等の微小領域の速度分布を計測可能な集積型デバイスへ展開するための技術を開発する．
  • Laser Doppler velocimetry for three-dimensional distribution measurement of velocity vectors based on optical spatial encoding
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2019/04 -2022/03 
    Author : Maru Koichi
     
    We studied the technologies to establish the method for measuring three-dimensional distributions of velocity vectors based on optical spatial encoding and differential laser Doppler velocimetry. We demonstrated the three-dimensional distribution measurement of a velocity component by developing a 4x4x5-channel experimental setup. We also developed the measurement system for measuring three velocity components for measuring velocity vectors. In addition, we designed Nb2O5/SiO2-based input/output grating couplers with high optical efficiency for integrated waveguide devices.
  • Laser Doppler velocimetry for dense cross-sectional velocity distribution measurement using spatial encoding and non-mechanical scanning
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2015/04 -2018/03 
    Author : Maru Koichi
     
    To establish a method for measuring a two-dimensional cross-sectional velocity distribution precisely and densely with a compact and reliable probe, we studied laser Doppler velocimetry using a combination of non-mechanical scanning and simultaneous multipoint measurement based on spatial encoding. We developed a technique for dense velocity distribution measurement with 48 measurement points and a signal acquisition/processing system for automated and high-speed measurement. In addition, we investigated a miniature probe using compact bulk optics and a waveguide-based integrated probe.
  • Realization of safe and worry-free community using security camera system, which watches over the whole community with privacy protection
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2015/04 -2018/03 
    Author : Fujii Yusaku
     
    The purpose of our research is to realize safe and worry-free community with security camera. In this study, we developed a security camera system which records all-inspection activity of the camera to prevent illegal use of the camera. With this system, it is possible to verify who, when, for what, which camera image was observed and whether the use of images was legitimate. Additionally, an image recognition function was added to the camera to greet to pedestrian and to detect illegal car stop. Some social experiments with developed cameras were carried out.
  • Geographic scaling of elastic optical network by introducing virtualized elastic regenerators
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2013/04 -2015/03 
    Author : JINNO Masahiko; MARU Koich
     
    In future translucent elastic optical networks, a programmable multi-carrier generator (PMG) and virtualized elastic regenerator (VER) replacement algorithm will be key technologies. We proposed PMG based on common optical frequency references that achieve both the precise sub-carrier spacing and the flexible center frequency assignment, and demonstrate a proof of concept experiment. In addition, we proposed VER-placement and routing and spectrum assignment algorithms, and numerically evaluated the effectiveness of the algorithms by applying them to protected and un-protected networks.
  • Development of reliable scanning laser Doppler velocimeter without moving mechanism in its probe
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2012/04 -2015/03 
    Author : MARU Koichi
     
    We studied a method for scanning laser Doppler velocimetry that doesn't require any moving mechanism in its probe to realize the equipment with a compact, reliable, and easily-handled probe for velocity distribution measurement. We developed techniques for directional discrimination and two-axis scanning. These techniques make it possible to apply the proposed velocimetry to various objects. In addition, we developed several types of miniaturized probes using free-space optics. We also investigated waveguide-type components for integration of the scanning laser Doppler velocimeter. As the results of the study, we have achieved the prospect of realizing an easily-handled scanning laser Doppler velocimeter for practical use.
  • Improvement of dynamic-error collection method for force transducers
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2012/04 -2015/03 
    Author : FUJII Yusaku; TAKITA Akihiro; YAMAGUCHI Takao; MARU Kouichi
     
    In order to improve dynamic correction method for a force sensor, we develop high-precision evaluating system of dynamic property of force sensors and evaluated and analyses the dynamic property. The measurement range and accuracy of evaluating system were improved. Some types of force sensors were evaluated and were investigated their dynamic properties by experimental results and FEM analysis. In addition to inertial, viscosity and delay of measurement equipment seemed to affect the dynamic error. We develop the correction method for the dynamic error and develop a software to correct the dynamic error with the correction method. We showed a way to resolve the problem that there is no evaluation method nor correction method for force transducers in the present state.
  • Suggestion of safe and secure town planning using security camera with both privacy protection and surveillance
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2012/04 -2015/03 
    Author : TAKITA Akihiro; FUJII Yusaku; OHTA Naoya; UEDA Hiroshi; MARU Kouichi; YOSHIURA Noriaki
     
    In order to develop and spread the new security camera system which resolves the problem of privacy invasion, we have developed the e-JIKEI camera and have established the operating policy for this cameras system through the social experiments. As the results, the e-JIKEI door phone, which always watches at the front of its outer unit and stores the video with encryption, was developed. In the mind of residents who participates a social experiment, the sense of insecurity about privacy invading seemed to reduce and the sense of insecurity about not to be watched seemed to increase. To realize the society in which no case of no ocular witness on accidents, we have advanced the e-JIKEI system.
  • 非メカニカルな血流速度分布計測用2次元断面走査型レーザドップラー速度計の開発
    科学技術振興機構：
    Date (from‐to) : 2012 -2013 
    Author : 丸 浩一
     
    高信頼かつ小型な血流速度分布計測手法の確立を目指し、速度方向に対して垂直な断面内を非メカニカルに走査可能な2次元断面走査型LDVを開発した。波長可変レーザと光スイッチを備えた本体と回折格子を備えたプローブを偏波保持ファイバアレイで接続する構成を提案し、模擬光学系による実験の結果、2次元断面走査可能であることを確認した。拍動による流速方向変化にも適した技術開発として、音響光学変調器および電気光学変調器を用いたヘテロダイン方式による速度方向識別方法を検討した。本方式を2次元断面走査用光学系に適用し、2次元断面走査かつ速度方向識別が可能となった。今後、プローブ小型化および流管を用いた実験を進めていく。
  • Development of calibration and correction method for dynamic error of force sensor
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2009 -2011 
    Author : FUJII Yusaku; YAMAGUCHI Takao; MARU Kouichi; TAKITA Akihiro
     
    For resolving the lack of dynamic force calibrating method for force transducer, we developed a new measurement and correction method using the levitation mass method. In this research, a high-precision measurement method for dynamic characteristics and a correction method which needs only the output signal of a force transducer and a parameter. We develop a program which corrects the output data of force sensor and open the program on our website for public free of charge.
  • Study on security camera system using image encryption for safety of community
    Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2009 -2011 
    Author : MARU Koichi; FUJII Yusaku; OOTA Naoya; UEDA Hiroshi; YOSHIURA Noriaki; TAKITA Akihiro
     
    We have proposed the new concept regarding the management of security cameras which consists of two basic concepts :(1) the concept in which each individual watches around his/ her house using cameras and a computer,(2) the concept for privacy protection by means of encryption of images. In this study, we developed technologies and conducted social experiments, aiming to spread the proposed concept and realize community safety. We developed various security camera systems with the function of privacy protection which enable us to significantly increase the applications of the concept, and we conducted social experiments to evaluate the systems. As the results of these activities, we have achieved the prospect of widely spreading the proposed concept.
  • 導波路型光デバイス
  • 光波による計測技術
  • optical waveguide devices
  • optical measurements

Social Contribution

  • 第3回高校物理の授業に役立つ基本実験講習会in高松
    Date (from-to) : -2022/12
    Role : Lecturer
    Sponser, Organizer, Publisher  : 基本実験講習会in高松実行委員会

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