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Research and development of fiber-amplifier-integrated optical isolator

Research Project

Project/Area Number 02505003
Research Category

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

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

Principal Investigator

KAWAKAMI Shojiro  Research Institute of Electrical Communication, Tokoku University, Professor, 電気通信研究所, 教授 (10006223)

Co-Investigator(Kenkyū-buntansha) TANAKA Hiroyuki  Telecommunication Division, Mitsubishi Cable Industries, Ltd., Senior Electrical, 電子通信研究部, 主席研究員
YOTSUYA Masami  Telecommunication Division, Mitsubishi Cable Industries, Ltd., Manager, 電子通信研究部, 部長
HANAIZUMI Osamu  Research Institute of Electrical Communication, Tohoku University, Research Asso, 電気通信研究所, 助手 (80183911)
SHIRAISHI Kazuo  Faculty of Engineering, Utsunomiya University Associate Professor, 工学部, 助教授 (90134056)
四ツ谷 雅實  三菱電線工業(株), 電子通信研究部, 部長
四ッ谷 雅実  三菱電線工業(株), 電子通信研究部, 部長
四ツ谷 雅実  三菱電線工業(株)電子通信研究部, 部長
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥43,800,000 (Direct Cost: ¥43,800,000)
Fiscal Year 1992: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1991: ¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 1990: ¥30,100,000 (Direct Cost: ¥30,100,000)
KeywordsFiber Integration / Isolator / Polarization Splitter / LPS / 偏光合離素子 / 光アイソレ-タ / TECファイバ / 光ファイバ / スポットサイズ
Research Abstract

(1)Fiber-integrated optical isolator
We made an isolator chip composed of Faraday rotator, lambda/2 plate, and polarization splitter (rutile). Fiber-in-line structure was realized using TEC fiber, which was used for reducing the insertion loss. Isolation 45dB, insertion loss 3.5dB, and reflection attenuation 47dB were obtained. This technology leads to lens-free and alignment-free integration, so it is suitable for large-scale integration of optical devices.
We are trying to realize a high performance optical isolator by replacing the rutile with the laminated polarization splitter.
(2)Laminated polarization splitter (LPS)
We made the LPS composed of a-Si : H and SiO_2 films and obtained the branching angle 15.5゚, which is nearly equal to the theoretical value. It was found that the high insertion loss was due to roughness of each film surface. We flattened the film surface by bias sputtering. LPS, fabricated by this method, has losses of 0.16dB and 0.17dB for ordinary and extraordinary beam, respectively.

Report

(4 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] K.Shiraishi: "Spatial walk-off palarizer utilizing artificial anisotropic dielectrics" Optics Letters. 15. 516-518 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Shiraishi: "Fiber-embedded in-line isolator" IEEE Journal of Lightwave Techndogy. 9. 430-435 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S.Kawakami: "Ge/SiO_2 laminated optical polarizer for the wavelength iegion 0.6-1Mm" IEEE Photonics Technology Lettes. 3. 648-650 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Sato: "Laminated polarization splitter with a large split angle" Applied Physics Letters. 61. 2633-2634 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K.Shiraishi: "Polarization-independent in-line optical isolator with lens-frce configuration" IEEE Journal of Lightwave Technology. 10. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Sato: "Fabrication tcchnigues and chaiacteristics of Al/SiO_2 laminated optical pelarizers" IEEE Journal Quantum Electronics. 29. 175-181 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] 川上彰二郎: "光波電波工学-電磁波の伝搬・伝送-" コロナ社, 150 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K. Shiraishi: "Spatial walk-off polarizer utilizing artificial anisotropic dielectrics"" Optics Letters. 15. 516-518 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K. Shiraishi: "Fiber-embedded in-line isolator" IEEE Journal of Lightwave Technology. 98. 430-4358 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S. Kawakami: "Ge/SiO_2 laminated optical polarizer for the wavelength region 0.6-1mum" IEEE Photonics Technology Letters. 3. 648-650 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T. Sato: "Laminated polarization splitter with a large split angle" Applied Physics Letters. 61. 2633-2634 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] K. Shiraishi: "Polarization-independent in-line optical isolator with lens-free configuration" IEEE Journal of Lightwave Technology. 10. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T. Sato: "Fabrication techniques and characteristics of Al/SIO_2 laminated optical polarizers" IEEE Journal of Quantum Electronics. 29. 175-181 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] S. Kawakami: "Light and radio wave engineering" Corona Publishing Co., Ltd.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T. Sato: "Laminated polarization splitter with a large spit angle" Applied physues Letters. 61. 2633-2634 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T. Sato: "Fabrication techniques and characteristics of Al/ SiO_2 リチモニミチカイシ ラセカニソチリ セラリチスニツイスト" IEEE Journal of Quantum Electronics. 29. 175-181 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] K. Shiraishi: "Polarization -independent in-line optrcal isolator with lens -free combguration" IEEE Journal of Lightwave Technology. 10. (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 白石 和男: "フィイバー集積宅光アイソレータ" 応用物理学会誌. 62. 51-52 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中善寺 知広: "光ファイバ集積型偏波依存アイソレータ" 電ハ情報通信学会技術報告. 0QE92-101. 19-24 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 佐藤 尚: "積層型偏光分離素子における構造不完全性による散乱損失" 電子情報通信学会技術報告. 0QE92-102. 25-30 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 川上 彰二郎: "光電電波工学ー電磁波の伝般・伝送ー" コロナ社, 150 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] K.Shiraishi: "New configuration of palarisation-independent isolator using a polarisation-dependent one" Electronics Letters. 27. 302-303 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K.Shiraishi: "Fiber-embedded in-line isolator" IEEE Journal of Lightwave Technology. 9. 430-435 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] S.Kawakami: "Ge/SiO_2 laminated optical polarizer for the wavelength region 0.6-1μm" IEEE Photonics Technology Letters. 3. 648-650 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 馬 徳山: "短波長帯用Ge/SiO_2積層型偏光子の設計と試作" 電子情報通信学会技術研究報告. OQE91. 11-16 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 馬 徳山: "島状金属膜をもつ短波長帯用積層形偏光子" 電子情報通信学会論文誌. J74-C-I. 552-559 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 土田 貫治: "a-Si:H/SiO_2多層膜からなる積層形偏光分離素子の作製と評価" 電子情報通信学会技術研究報告. OQE91. 67-72 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 川上 彰二郎: "光ファイバ形超小型光デバイス" 電子情報通信学会技術研究報告. OQE90. 43-48 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Shiraishi: "Spatial walkーoff polarizer utilizing artificial anisotropic dielectrics" Optics Letters. 15. 516-518 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Shiraishi: "Beam Expanding Fiber Using Thermal Diffusion of the Dopant" IEEE Journal of Lightwave Technology. 8. 1151-1161 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Shiraishi: "Experimental uerification of a formーbirefringent polariyation splitter" Applied Physics Letters. 58. 211-212 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Shiraishi: "New conbiguration of polariyationーindependent isolator using a polariyationーdependent one" Electronics Letters. 27. 302-303 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] K.Shiraishi: "FiberーEmbedded InーLine Isolator" IEEE Journal of Lightwave Technology. 9. (1991)

    • Related Report
      1990 Annual Research Report

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

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