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Modulation Bandwidth Control of Light Modulator and its Application

Research Project

Project/Area Number 10650048
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionRitsumeikan University

Principal Investigator

MORIMOTO Akihiro  Ritsumeikan University, Fac. Science and Engineering, Professor, 理工学部, 教授 (00142307)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsLight Modulator / Ultrafast / Domain Inversion / Bandwidth / LiTaO3 / Phase Modulation / Sideband Generation / Femtosecond / 電気光学変調 / 疑似速度整合 / LiTaO_3 / 非周期 / 変調帯域 / テラヘルツ
Research Abstract

Periodic domain inversion of electrooptic crystals makes quasi-velocity-matching possible between light and microwave velocities in collinear microwave light modulator and provides large phase modulation index enough for generating femtosecond light pulses. In this research, we investigated the control of modulation bandwidth and band-shape by changing domain inversion pattern on the electrooptic phase modulator from simple periodic rectangles. We found some useful patterns of domain inversion that are suitable for wideband flat microwave modulation and an efficient modulator for specific two microwave frequencies by theoretical calculation. Domain inversion of electrooptic crystals was investigated for precise domain control. Charge control was quite important, so we employed current monitoring system for automatic domain control. We investigated novel domain pattern for ultrafast light control. We developed a diffractive optical modutator at a microwave frequency of which operation is similar to AOM. A guided wave modulator developed with domain inversion was suitable for ultrafast light pulse generation. All devices were optical sideband generators at microwave frequencies and the spectral control with dispersive devices makes ultrafast light pulse control possible.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] H. Murata: "Quasi-Velocity-Matched Guided- Wave Optical Modulator for Integrated Ultrashort Pulse Generators"CLEO 2000,to be published. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A. Maruko: "Ultrafast Electrooptic Traveling Phase Grating with Periodic Domain Inversion"Int'l Symp. on Optical Commun. and Sensing. C-7. 211-212 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] D.-S. Kim: "Optical Pulse Synthesis by Ultrafast EO Traveling Phase Grating"6th Femtosecond Technology. WB-12. 57-57 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Murata: "Quasi-Velocity-Matched LiTaO_3 Guided-Wave Optical Modulator and its Application to Ultrashort Pulse Generation"6th Femtosecond Technology. WC-36. 96-96 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 森本朗裕: "電気光学位相格子とその応用"輻射科学研究会資料. RS99-9. 1-16 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] D.-S. Kim: "Ultrashort Optical Pulse Shaping by Electrooptic Synthesizer"IEICE Trans. Electron.. E81-C,2. 260-263 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A. Morimoto: "Femtosecond Technology, eds. T. Yajima, et al."Spriner-Verlag. 100 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 森本朗裕: "レーザー工学,中井 編,第3章"オーム社. 250 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A.Maruko, et al.: "Ultrafast Electrooptic Traveling Phase Grating with Periodic Domain Inversion"Int'l Symp. on Optical Commun. and Sensing. C-7. 211-212 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] D.S.Kim et al: "Optical Pulse Synthesis by Ultrafast EO Traveling Phase Grating"6th Femtosecond Technology. WB-12. 57 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H.Murata, et al.: "Quansi-Velocity-Matched LiTa 03 Guided-Wave Optical Modulator and its Application to Ultrashort Pulse Generation"6th Femtosecond Technology. WB-36. 96 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Kobayashi and A.Morimoto: "Femtosecond Technology eds.T.Yajima, et al."Springer-Verlag. 1999.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] D.S.Kim, et al.: "Ultrashort Optical Pulse Shaping by Electrooptic Synthesizer"IEICE Trans. Electron. E81-C. 260-263 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A.Morimoto, et al.: "Femtosecond Pulse Generation and Shaping by Electrooptic Modulation"Current Top. Laser Technol.. 98. 47 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H.Murata, et al.: "Quasi-Velocity-Matched Guided-Wave Optical Modulator for Integrated Ultrashort Pulse Generators"CLEO2000. (to be published).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] A.Maruko: "Ultrafast Electrooptic Traveling Phase Grating with Periodic Domain Inversion"Int'l Symp.on Optical Commun.and Sensing. C-7. 211-212 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] D.-S.Kim: "Optical Pulse Synthesis by Ultrafast EO Traveling Phase Grating"6th Femtosecond Technology. WB-12. 57-57 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Murata: "Quasi-Velocity-Matched LiTaO_3 Guided-Wave Optical Modulator and its Application to Ultrashort Pulse Generation"6th Femtosecond Technology. WC-36. 96-96 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 森本 朗裕: "電気光学位相格子とその応用"輻射科学研究会資料. RS99-9. 1-15 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Kobayashi: "Femtosecond Technology,eds.T.Yajima,et al.,III-2"Springer-Verlag. 426 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 森本 朗裕: "レーザー工学,中井 編,第3章"オーム社. 160 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] D.-S.Kim: "Ultrashort Optical Pulse Shaping by Electrooptic Synthesizer" IEICE Trans.Electron.E81-C・2. 260-263 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Maruko: "Ultrafast Electrooptic Traveling Phase Grating with Periodic Domain Inversion" 1999 CRL Int'l Symp.on Optical Commun.and Sensing,Tokyo. C-7 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 森本 朗裕: "超短光パルスの発生・制御技術" 電気関係学会関西支部連合大会予稿. S-41 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 森本朗裕(中井貞雄 編): "レーザー工学,第3章" オーム社, (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Kobayashi: "Femtosecond Technology,ch.III" Springer-Verlag, (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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