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1997 Fiscal Year Final Research Report Summary

Research on new schemes for integrated coupling between arrayd laser diodes and single-mode fibers

Research Project

Project/Area Number 08555089
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 情報通信工学
Research InstitutionUtsunomiya University

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) OHISHI Isamu  Furukawa Electric Co., Ltd, Senior Manager, 情報システム事業本部・マルチメディア推進室, 部長
MATSUMURA Kazuhito  Utsunomiya University, Faculty of Eng., Professor, 工学部, 教授 (70005297)
Project Period (FY) 1996 – 1997
KeywordsLensed fiber / GI fiber / Coreless fiber / Optical communication / Coupling / Working distance / Optical fiber / Laser diode
Research Abstract

Two kinds of new configurations of lensed fibers as the coupling between laser diodes and single-mode fibers have been proposed and their operations are experimentally confirmed. The reserch has succesfully finished. Main results obtained are as follows :
1.Long working distance and wide tolerances
We have proposed a lensed fiber that consists of a hemispherically-ended coreless-fiber and a quarter-pitch length of a graded-index fiber. Fabrication is quite simple and rapid. Basic characteristics of the new comfiguration, including long working distances (140mum) and wide lateral tolerances (+/- 1.2mum), are experimentally verified. The new configuration is suitable for integration-oriented coupling between arrayd laser diodes and an array of single-mode fibers.
2.A high coupling efficiency
A new configuration of lensed fiber that consists of cascaded two kinds of GI-fiber tips has been proposed. Basic characteristics, a low loss (2.0dB) and wide tolerance with a long working distance (50mum), have experimentally verified.
3.Other technical results
A new tool for cutting optical fibers with precision of 10 mum, a hemisherical-ending technique with a high precision by use of an arc-discharge, and a precise loss-estimation method based on the ray optics are newly developped in the research.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] K.Shiraishi: "Integration of in-line optical isolators(invited)" INTERMAG. BA-04 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Sato: "Lens-free alignment-free optical isolators integrated into a fiber array" ECOC. TuC.3.6 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi: "Integration of in-line optical isolators" IEEE Transactions on Magnetics. 32. 4108-4112 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi: "A lensed-fiber coupling scheme utilizing a graded-index fiber and a hemispherically-ended coreless fiber tip" IEEE/OSA Journal of Lightwave Technology. 15. 356-363 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi: "Laminated polarizers exhibiting high perofrmance over a wide range of wavelength" IEEE/OSA Journal of Lightwave Technology. 15. 1042-1050 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi: "Spot size reducer for standard single-mode fibers utilizing a graded-index fiber tip" IOOC-ECOC. MO2C (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Muro: "Poly-Si/SiO2 laminated walk-off polarizer having a beam-splitting angle of more than 20゚" IEEE/OSA Journal of Lightwave Technology. 16. 127-133 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Shiraishi and S.Kawakami: "Integration of in-line optical isolators (invited)" INTERMAG. paperBA-04 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Sato, R.Kasahara, T.Irie, K.Shiraishi, and S.Kawakami: "Lens-free alignmenr-free optical isolators integrated into a fiber array" ECOC. paperTuC3-6 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shiraishi, T.Irie, T.Sato, R.Kasahara, O.Hanaizumi, and S.Kawakami: "Integration of in-line optical isolators" IEEE Transactions on Magnetics. vol.32. 4108-4112 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shiraishi, H.Ohunki, N.Hiraguri, K.Matsumura, I.Ohishi, H.Morichi, and H.Kazami: "A lensed-fiber coupling scheme utilising a graded-index fiber and a hemisphrically-ended coreless fiber tip" IEEE/OSA Journal of Lightwave Technology. Vol.15. 356-363 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shiraishi, H.Hatakeyama, H.Matsumoto, and K.Matsumura: "Laminated polarizers exhibiting high performance over a wide range of wavelength" IEEE/OSA Journal of Lightwave Technology. Vol.15. 1042-1050 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Shiraishi, A.Ogura, and N.Hiraguri: "Spot size reducer for standard single-mode fibers utilizing a graded-index fiber tip" IOOC-ECOC. paperMO2C (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Muro and K.Shiraishi: "Poly-Si/SiO2 laminated walk-off polarizer having a beam-splitting angle of more the 20゚" IEEE/OSA Jourmal of Lightwave Technology. Vol.16. 127-133 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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