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Basic Study of Laser Beam Applications to Space

Research Project

Project/Area Number 04452188
Research Category

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

Allocation TypeSingle-year Grants
Research Field 情報工学
Research InstitutionTHE INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE

Principal Investigator

TAKANO Tadashi  The institute of Space and Astronautical Science Radio Tracking Professor, 電波追跡工学, 教授 (80179465)

Co-Investigator(Kenkyū-buntansha) YAMADA Takahiro  The Institute of Space and Astronautical Science Radio Tracking Associate Profes, 符号、信号理論, 助教授 (50167714)
FUJII Youichi  The Institute of Industrial Science, University of Tokyo Electronics Engineering, 生産技術研究所・光電子工学, 教授 (00013110)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1993: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsOptical antenna / Antenna gain / Mirror shaping / Manufacturing error / Electrooptical constant measurement / photo refractive sentitivity / Machzehnder interferometer / Adaptive coding / 一体形 / 電気光学定数 / 曲面修整 / 支持構造 / 金属反射率 / 空間ビーム伝送 / 連接符号
Research Abstract

As for optical antennas, a computer program has been made to shape reflectors. It is shown that the antenna gain can be improved by 1.5dB and the weight can be reduced by 40 percent in comparison with Gaussian optics. Next, the characteristics degradation due to support structures and manufacturing errors is analyzed for the case of dual reflector antennas. It is clarified that, If the manufacturing error amounts to be 5mmu in thickness, the aperture distribution should be tapered from a rectangular pattern at the shoulders, and the F/D value should be larger than 0.5. The reflector curves are typically aspheherical ones.
An optical antennas has been manufactured by an NC machine, and measured using the near-field method. The amplitude distribution is close to the desired one. Phase distribution in the near field and the far field patterns should be measured later.
In order to measure electrooptical contants which play an important role in the interference phenomena, a simplified and highly accurate measurement facility is realized with amplitude modulation scheme. The electrooptical constant of a proton-exchanged LiNb03 waveguide has been successfully obtained. And the photo refractive sensitivity has been measured quantitatively for the first time.
The coding scheme to adapt the coding ratio according to the ratio of optical signal power and the noise power is proposed.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 米原総、高野忠: "ビーム修整による回折制御と光干渉特性改善の検討" 電子情報通信学会論文誌. vol.J75-B-II,NO.12. 1992 (944-949)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.T.Lay,Y.Kondo and Y.Fujii: "Effect of Annealing on Electrooptic Constant of the Undoped and the MgO-Doped Lithium Niobate Optical Waveguides" IEICE Transactions. vol.E74,no.11. 1991 (3870-3872)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Takano and A.Kojima: "Fundamental Investigation of an Optical Antenna" 1993 IEEE APS/URSI Joing Meeting,Ann Arbor.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 児島敦、渡部雅樹、高野忠: "反射形光アンテナの特性解析" 1993年電子情報通信学会春季大会. B-87. 1993 (2-87)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Y.Kondo,et al.: "Quantitaively Measured Photorefractive Sensitivity of Proton-Exchanged LN,Proton-Exchanged MgO-doped LN and Ion-Exchanged KTP Waveguides" GRIN. 1992 (171-174)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Yuhara, et al.: "Effect of Annealing and Melt Dilution on Photorefractivs Sensitivity of Proton-Exchanged LiTaO" 3,OEC. 1992 (224-225)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] K.Hirasawa and M.Haneishi (edit.): ""Analysis,Design,and Measurement of Small and Low Profile Antennas", (T.Takano,"Chapter 6 : Design and Analysis of Small-Aperture Antennas")" Artech House,Boston, (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Takano and A.Kojima,: ""Fundamental Investigation of an Optical Antenna"" IEEE APS/URSI Joing Meeting Ann Arbor(Post Deadline paper).(1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 児島敦、高野忠、: ""加工誤差を考慮した光アンテナの設計最適化"" 1993年電子情報通信学会秋季大会、. B-81,. P.2-81, (1993.)

    • Related Report
      1993 Annual Research Report
  • [Publications] 児島敦、高野忠、: ""光アンテナの設計と特性解析"、" 電子情報通信学会技術研究報告. A/P. 92-142,pp55-60 ((1993/09).)

    • Related Report
      1993 Annual Research Report
  • [Publications] 児島敦、高野忠、: ""衛星間通信用光アンテナの基礎検討"、" 第37回宇宙科学技術連合講演会、. 1B16、. pp.59-60 (1993.)

    • Related Report
      1993 Annual Research Report
  • [Publications] "Quantitatively Measured Photorefractive Sensitivity of Proton-Exchanged LN," Proton-Exchanged MaO-Doped Ln and Ion-Exchanged KTP Waveguides. pp.171-174) ((1992,GRIN,)

    • Related Report
      1993 Annual Research Report
  • [Publications] "Effect of Annealing and Melt Dilution on Photorefractive Sensitivity of Proton-Exchanged" LiTa. 03. pp.224-225) ((1992,OEC,)

    • Related Report
      1993 Annual Research Report
  • [Publications] 米原 総.高野 忠: "ビーム修整による回析制御と光干渉特性改善の検討" 電子情報通信学会論文誌. J75-B-II. 944-949 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 高野 忠.児島 敦 渡部 雅樹: "光アンテナの基礎検討" 1992年電子情報通信学会秋季大会論文集. 2. 58- (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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