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Development of an optical system for perfect coupling in the DWDM optical communication system

Research Project

Project/Area Number 12555095
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 電子デバイス・機器工学
Research InstitutionUtsunomiya University

Principal Investigator

SHIRAISHI Kazuo  Utsunomiya Univ., Faculty of Engineering, Professor, 工学部, 教授 (90134056)

Co-Investigator(Kenkyū-buntansha) SATO Toshimichi  Namiki Quanta Optic Technologies, Section Leader, オプト商品グループ, 設計セクションリーダー
YODA Hidehiko  Utsunomiya Univ., Faculty of Eng., Research Associate, 工学部, 助手 (30312862)
MATSUMURA Kazuhito  Utsunomiya Univ., Faculty of Eng., Professor, 工学部, 教授 (70005297)
佐藤 平道  並木精密宝石(株), オプト商品グループ, 設計セクションリーダー
大石 勇  (株)モリテックス, オプトコムカンパニー・デバイス開発グループ, グループリーダー
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥11,800,000 (Direct Cost: ¥11,800,000)
Fiscal Year 2001: ¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 2000: ¥6,600,000 (Direct Cost: ¥6,600,000)
Keywordsoptical fiber / field distribution / GI fiber / lensed fiber / optical communication / laser diode / graded index / 光ファイバ増幅器 / 結合損失
Research Abstract

This research has successfully finished. We aimed the development of optical system for perfect coupling between pumping laser diodes (LDs) and receiving optical fibers in the DWDM system, and achieved the aim by using wedge-shaped graded-index (GI) lensed fibers. In this research we evaluated the optical radiation characteristics of high-power semiconductor LDs at first. Next, we designed and produced (1) wedge-shaped GI lensed fibers and (2) cascade-type wedge-shaped GI lensed fibers. As a result, the wedge-shaped GI fibers succeeded in improving the coupling coefficient between LDs and fibers compared with conventional techniques. Following are summaries of the results.
1. Development of wedge-shaped GI fibers
High-power semiconductor LDs for pumping EDFAs are designed to emit elliptical modal fields at their endface with high aspect ratio from 2 over 40. In addition, they tend to have large astigmatism of over 100 μm. As the aspect ratio is higher, the coupling losses between these L … More Ds and receiving optical single-mode fibers become larger using conventional lensed fibers. We propose a new lensed fiber employing a wedge-shaped GI fiber, of which the coupling loss is estimated to be 2.5 dB. We fabricated the proposed fiber and investigated its coupling loss characteristic, but the coupling loss was 5.8 dB. Because some differences between designed structural parameters of the fiber and measured ones exist.
2. Development of cascaded-type wedge-shaped GI fibers
In order to improve the not small coupling loss of 5.8 dB, we proposed a new fiber employing two cascaded GI fiber chips with a wedge-shaped end. The cascade-type wedge-shaped GI fiber achieves high-efficiency coupling with LDs even if the LDs have large astigmatism. We fabricated the proposed fibers for the LD with an aspect ratio at the endface of 42 and astigmatism of 176 μm. We experimentally confirmed that the proposed lensed fiber had a low coupling loss of 2.5 dB and a long working distance of 67 μm. We also investigated the tolerance characteristics for various displacements. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] H.Yoda: "A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers"IEEE/LEOS Workshop on Fiber Optic Passive Components Proceedings. 106-111 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Shiraishi: "A New Lensed-Fiber Configuration Employing Cascaded GI-Fiber chips for Efficient Coupling Between Laser Diodes and Single-Mode Fibers"IEEE/OSA Journal of Lightwave Technology. 18・6. 787-794 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Ogura: "A Field-Profile Transformer Utilizing a Graded-Index Oval-Core (GIO) Fiber"IBEE/OSA Journal of Lightwave Technology. 19・1. 49-53 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Ogura: "Silica GIO fibers with high performance"2001 Optical Fiber Communication Conference Proceedings. ThC5 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Ogura: "Experimental performance of silica GIO fibers with a highly elliptic core"IEEE Photonics Technology Letters. 13・6. 594-596 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A.Ogura: "Efficient coupling between laser diodes with a highly elliptic field and single-mode fibers by means of GIO fiber"IEEE Photonics Technology Letters. 13・11. 1191-1193 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Yoda: "A lensed fiber employing a wedge-shaped GIF for high-efficiency coupling between SMFs and high-power LDs having ultra-high aspect ratio"27th European Conference on Optical Communication Proceedings. 3. 418-419 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Yoda: "A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers"IEEB/OSA Journal of Lightwave Technology. 19・12. 1910-1917 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Yoda: ""A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers""IEEE/LEOS, Workshop on Fiber Optic Passive Components (WFOPG), Pavia, Italy. 106-111 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K. Shiraishi: ""A New Lensed-Fiber Configuration Employing Cascaded GI-Fiber chips for Efficient Coupling Between Laser Diodes and Single-Mode Fibers""IEEE/OSA Journal of Lightwave Technology. vol, 18. no. 6. 787-794 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Ogura: ""A Field-Profile Transformer Utilizing a Graded-Index Oval-Core (GIO) Fiber""IEEE/OSA Journal of Lightwave Technology. vol, 19. no. 1. 49-53 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Ogura: ""Silica GIO fibers with high performance""in the 2001 Optical Fiber Communication Conference. ThC5. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Ogura: ""Experimental performance of silica GIO fibers with a highly elliptic core""IEEE Photon. Technol. Lett.. vol. 13, no. 6. 594-596 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] A. Ogura: ""Efficient coupling between laser diodes with a highly elliptic field and single-mode fibers by means of GIO fibers""IEEE Photon. Technol. Lett.. vol. 13, no. 11. 1191-1193 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Yoda: ""A lensed fiber employing a wedge-shaped GIF for high-efficiency coupling between SMFs and high-power LDs having ultra-high aspect ratio""27th ECOC, Amsterdam. Proceedings vol. 3. 418-625 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Yoda: ""A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers""IEEE/OSA Journal of Lightwave Technology. vol. 19, no. 12. 1910-1917 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Yoda: "A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers"IEEE/LEOS Workshop on Fiber Optic Passive Components Proceedings. 106-111 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "Experimental verification of the modal-field transformation in silica-based GIO fibers"IEEE/LEOS Workshop on Fiber Optic Passive Components Proceedings. 164-167 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] K. Shiraishi: "A New Lensed-Fiber Configuration Employing Cascaded GI-Fiber chips for Efficient Coupling Between Laser Diodes and Single-Mode Fibers"IEEE/OSA Journal of Lightwave Technology. 18・6. 787-794 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 堀江 晴彦: "石英と多結晶シリコンから成る低損失LPSの作製"電子情報通信学会技術研究報告. OPE2000-55. 13-18 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "A Field-Profile Transformer Utilizing a Graded-Index Oval-Core (GIO) Fiber"IEEE/OSA Journal of Lightwave Technology. 19・1. 49-53 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "Silica GIO fibers with high performance"2001 Optical Fiber Communication Conference Proceedings. ThC5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "Experimental performance of silica GIO fibers with a highly elliptic core"IEEE Photonics Technology Letters. 13・6. 594-596 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "Efficient coupling between laser diodes with a highly elliptic field and single-mode fibers by means of GIO fiber"IEEE Photonics Technology Letters. 13・11. 1191-1193 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 小倉明: "石英系GIOファイバによる楕円界分布をもつ半導体レーザとファイバとの高効率結合"電子情報通信学会技術研究報告. OFT2001-4. 19-24 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 依田秀彦: "高アスペクト比を有する980nmLDとの高効率結合用レンズドファイバ"電子情報通信学会技術研究報告. OFT2001-5. 25-30 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H. Yoda: "A lensed fiber employing a wedge-shaped GIF for high-efficiency coupling between SMFs and high-power LDs having ultra-high aspect ratio"27th European Conference on Optical Communication Proceedings. 3. 418-419 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Ogura: "Efficient coupling between laser diodes and single-mode fibers by means of GIO fibers"27th European Conference on Optical Communication Proceedings. 4. 624-625 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Ogura: "A field-profile transformer utilizing a graded-index oval-core (GIO) fiber"IEEE/OSA Journal of Lightwave Technology. 19・1(in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Shiraishi: "A new lensed-fiber configuration employing cascaded GI-fiber chips"IEEE/OSA Journal of Lightwave Technology. 18・6. 787-794 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Ogura: "Silica GIO fibers with high performance"Optical Fiber Communication Conference. paper ThC (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Ogura: "Experimental verification of the modal-field transformation in silica-based GIO fibers"Workshop on Fiber Optic Passive Components. 164-167 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Yoda: "A new scheme of a lensed fiber employing a wedge-shaped graded-index fiber tip for the coupling between high-power laser diodes and single-mode fibers"Workshop on Fiber Optic Passive components. 106-111 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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