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Development of High-Efficiency Wideband Acousto-Optic Devices Using Periodic Ferroelectric Inverted Domains.

Research Project

Project/Area Number 02555075
Research Category

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

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

Principal Investigator

NAKAMURA Kiyoshi  Tohoku University, Faculty of Eng., Professor, 工学部, 教授 (00005365)

Co-Investigator(Kenkyū-buntansha) OHTA Yoshinori  NEC Corporation, Senior Manager, 研究開発技術本部, 部長
SHIMIZU Hiroshi  Aomori University, Professor, 工学部, 教授 (00005175)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1991: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1990: ¥5,500,000 (Direct Cost: ¥5,500,000)
KeywordsAccousto-Optic Device / Ultrasonic Transducer / Optical Filter / Light Modulator / Ferroelectrics / Lithium Niobate / Domain Reversal / Piezoelectrics / 分域
Research Abstract

The purpose of this research is to propose UHF ultrasonic transducers using periodic ferroelectric domains of LiNbO_3 formed by Ti-diffusion and to develop high efficiency wideband acousto-optic devices using them. The results can be summarized as follows : 1. The dependence of the domain structure on Ti Diffusion conditions was investigated, and the optimum fabrication process for the new ultrasonic transducers using periodic ferroelectric domains of LiNbO_3 was established. 2. The ultrasonic transducers were theoretically analyzed. The dependence of the characteristics on the crystal orientation, domain structure, and electrode configuration was investigated to know the optimum structure. 3. A New method for measuring the transducer characteristics precisely by fourier-transforming the 1st echo of the impulse response derived from the frequency characteristic of reflectivity was proposed. 4. The influence of the surface acoustic waves on the transducer characteristics was examined. I … More t was shown that the influence could be reduced remarkably by using non-periodic electrodes. 5. A high-efficiency wideband shear wave transducer with a conversion loss as low as 4.1dB and a specific bandwide as wide as about 90% could be obtained using 128゚ rotated Y-cut LiNbO_3. It was also shown that transducers optrating above 1GHz could be realized. 6. The interaction between acoustic and optical waves in LiNbO_3 was theoretically analyzed and the orientation dependence of the synthetic figure of merites was investigated. It was clarified that the isotropic optical Bragg deflector on a 36゚ rotated Y-cut, the anisotropic optical Bragg deflector on a 118゚ rotated Y-cut, and the collinear tunable optical filter on a 141゚ rotated Y-cut are promising configur ations. 7. The isotropic optical Bragg deflector on a 36゚ rotated Y-cut deflected optical beams as theoretically predicted. 8. The collinear tunable optical filter fabricated on a 128゚ rotated Y-cut exhibited an excellent characteristics. Less

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] 中村 僖良: "超音波トランスジュ-サ" 日本音響学会誌. 47. 196-200 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: "Ferroelectric Inversion Layers Formed by Heat Treatment of Proton-Exchanged LiTaOCC3DD" Applied Physics Letters. 56. 1535-1536 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 加藤 昌法: "LiNbO_3128°回転Y面の反転分域を利用した横波トランスジュ-サ" 電子情報通信学会技術研究報告. 91. 9-14 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 加藤 昌法: "反転分域型超音波トランスジュ-サを用いたコリニア型音響光学フィルタの試作" 日本音響学会講演論文集. 939-940 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: "Acoustic Transverse Wave Transducers Using Stripe-Domains on Lithium Niobate" IEEE Transactions on UFFC. 39. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yoshinori Katoh: "Characteristics of Collinear Acousto-Optic Tunable Filters Using Stripe-Domain Ultrasonic Transducers" Electronics Letters. 28. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: ""Ultrasonic Transducers"" Journal of the Acoustical Society of Japan. 47. 196-200 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: ""Ferroelectric Inversion Layers Formed by Heat Treatment of Proton-Exchanged LiTaO_3" Applied Physics Letters. 56. 1535-1536 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: ""Estimation of Thickness of Ferroelectric Inversion Layers in LiTaO_3 Plates by Measuring Piezoelectric Response"" Japanese Journal of Applied Physics. 29, Suppl. 29-1. 95-97 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yoshinori Katoh: ""Transverse Wave Transducers Using Stripe-Domains on 128゚ Rotated Y-Cut Lithium Niobate"" Technical Reports of IEICE Jpn.91. US91-49 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yoshinori Katoh: ""Characteristics of Collinear Acousto-Optic Tunable Filters Using Stripe-Domain Ultrasonic Transducers"" Electronics Letters. 28. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yoshinori Katoh: ""Configurations of Acousto-Optic Devices Using Stripe-Domain Ultrasonic Transducers"" Japanese Journal of Applied Physics. 31. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Kiyoshi Nakamura: ""Antipolarity Domains Formed by Heat Treatment of Ferroelectric Crystals and Their Applications"" Japanese Journal of Applied Physics. 31, Suppl. 31-1. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 中村 僖良: "超音波トランスジュ-サ" 日本音響学会誌. 47. 196-200 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kiyoshi Nakamura: "Ferroelectric Inversion Layers Formed by Heat Treatment of Proton-Exchanged LiTaO_3" Applied Physics Letters. 56. 1535-1536 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 加藤 昌法: "LiNbO_3 128°回転Y面の反転分域を利用した横波トランスジュ-サ" 電子情報通信学会技術研究報告. 91. 9-14 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 加藤 昌法: "反転分域型超音波トランスジュ-サを用いたコリニア型音響光学フィルタの試作" 日本音響学会講演論文集. 939-940 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kiyoshi Nakamura: "Acoustic Transverse Wave Transducers Using Stripe-Domains on Lithium Niobate" IEEE Transactions on UFFC. 39. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Yoshinori Katoh: "Characteristics of Collinear Acousto-Optic Tunable Filters Using Stripe-Domain Ultrasonic Transducers" Electronics Letters. 28. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中村 僖良: "LiNbO_3の反転分域を利用した超音波トランスジュ-サ-の解析" 日本音響学会講演論文集. 731-732 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 中村 僖良: "超音波トランスジュ-サ" 日本音響学会誌. 47. 196-200 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 加藤 昌法: "周期反転分域型超音波トランスジュ-サを利用した音響光学デバイスの構成" 日本音響学会構演論文集. 663-664 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Kiyoshi Nakamura: "Theoretical Analysis of LiNbO_3 Ultrasonic Trancducers Using AntiーPolarity Stripe Domains." The Journal of the Acoustical Society of Japan (E). 13. (1992)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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