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Basic Research for Guided-wave Light Modulation in Millimeter-Wave Region

Research Project

Project/Area Number 61460142
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 電子機器工学
Research InstitutionOsaka University

Principal Investigator

IZUTSU Masayuki  Osaka Univ, Fac Engrg Sci, Assoc Prof., 基礎工学所, 助教授 (70093375)

Co-Investigator(Kenkyū-buntansha) HAGA Hiroshi  Osaka Univ, Fac Fegrg Sci, Assoc., 基礎工学部, 助手 (80172831)
SUETA Takasi  Osaka Univ, Fac Engrg Sci, Prof., 基礎工学部, 教授 (20029408)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1987: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1986: ¥4,300,000 (Direct Cost: ¥4,300,000)
KeywordsIntegrated optics / Guided-wave light modulator / Lithium niobate / Millimeter-wave light modulation / Band limited operation / Resonant electrode / 共振型電極 / 定在波型光変調 / 光変調 / 導波形光変調素子 / 超高速光変調
Research Abstract

We have succeeded to modulate light beams by a millimeter-wave signal. A guided-wave light modulator was constructed using a newly designed resonant electrode put on a Ti indiffused LiNbO_3 waveguide subsrate and its performance was tested in 33 to 40GHz frequency range. With 220mW dreve power, 1-rad phase modulation was obtained at a center frequency 35.3GHz for 633nm wavelength. A measured 3-db bandwidth was 5GHz. A frequency spectrum of a modulated output light beam was measured by using a scanning Fabry-Perot interferometer. With 1W drive power of 37.7GHz, a spectrum of 1.5rad phase modulation was observed. It is believed that this is the first known light modulation experiment in millimeter-wave renge with a modulation index reached to the point of being usable in practical application.
The other significant result of the present research is that the advantage to limit the modulation bandwidth is sonfirmed from the experimental results for the light modulation in higher frequency region. To bring the operating frequency of the modulator up to the higher frequency range, new design concept for the light modulator has to be introduced. If a device is designed for millimeter-wave modulation with the conventional traveling-wave or lumped type structure, unreasonably high drive power will be required to obtain a practical modulation index.
We have proposed two types of modulator constructions, wherein standing-wave type and filter-line type electrodes are applied to the guided-wave modulations. The necessary modulating power is decreased framatically, while the bandwidth is sacrificed with these structures. They operate within limited range of bands around their resonant frequencies. Two modulators with these schemes were designed, constructed and tested their performances. They are operated successfully in 10 to 15 GHz frequency region. The same concept is applied to the millimeter-wave light modulator.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 芳賀宏: IEEE J. Quantum Electron.QE-22. 902-906 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 井筒雅之: Trans. IEICE. E71. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 井筒雅之: 信学論C. 101. J71-C. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 村上浩一: 信学技報. Vol. OQE86-126. 71-78 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 水落隆司: 信学技報. Vol. OQE87-25. 87-94 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 水落隆司: 信学技報. Vol. OQE87-163. 29-36 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] HAGA,Hiroshi: "LiNbO3 traveling-wave light modulator/switch with an etched groove" IEEE J Quantum Electron. QE-22. 902-906 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] IZUTSU,Masayuki: "On the design of resonant electrodes for efficient guided-wave light modulators" Trans.IEICE. E71. in the press (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] IZUTSU,Masayuki: "Guided-wave light modulator using resonant electrode" Trans.IEICE. J71-C. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] MIZOUCHI,Takashi: "Phase compensated optical waveguide modulator using periodic electrode structure" Tech Report IEICE. OQE87-25. 87-94 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] MIZOUCH,Takashi: "35GHz band standing-wave light modulator using a resonant electrode" Tech.Digest IEICE. OQE87-163. 29-36 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] M.Izutsu;H.Nakanishi;T.Sueta: Trans.IECE Japan. .4vo1.E69,no. 415-417 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] H.Haga;M.Izutsu;T.Sueta: IEEE J.Quantum Electron.vo1.OE-22,no.6. 902-906 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] M.Izutsu;A.Enokihara;T.Sueta: IEEE J.Lightwave Tech.vo1.LT-4,no.7. 833-866 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] M.Izutsu;A.Enokihara;T.Sueta: Optoelectronics. vo1.1,no.2. 195-201 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] T.Sueta;M.Izutsu: First Optoelectronics Conference Tech Digest. 10-11 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] M.Izutsu;H.Murakami;T.Sueta: OFC/IOOC'87 Tech.Digest. TUQ32. 126 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 井筒雅之: "光ファイバ応用技術集成 【III】-5" 日経技術図書, 700 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 井筒雅之: "電子通信ハンドブック(第2編,第5部門,3章,光共振器)" オーム社, (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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