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光通信及び医療における超広帯域光源用フォトニック結晶ファイバ

Research Project

Project/Area Number 09F09078
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Measurement engineering
Research InstitutionUniversity of the Ryukyus

Principal Investigator

波平 宜敬  国立大学法人琉球大学, 工学部, 教授

Co-Investigator(Kenkyū-buntansha) BEGUM Feroza  国立大学法人琉球大学, 工学部, 外国人特別研究員
Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2010: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2009: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordsフォトニック結晶ファイバ / 波長分散 / 分散補償 / 閉じ込め損失 / 非線形係数 / 分散フラット / 有限差分法 / 実効断面積 / 光ファイバ / 非線形定数 / スーパーコンティニューム(SC) / 光コヒーレンストモグラフイ(OCT)
Research Abstract

本年度は、光ファイバ中に多数のエアホールを規則正しく配列した構造を有するフォトニック結晶ファイバ(PCF)の最適設計を昨年度の研究成果を発展させる形で研究を実施した。
光パルスの群速度が波長(色)によって異なる波長分散特性が、広い波長域1.25μmから1.61μmで、平坦(フラット)の特性0+/-1.15ps/(mm.km)で、かつ同時にPCFを実用化する際の重要なパラメータの一つである閉じ込め損失が小さい(10-10dB/m)先端的なPCFを数値解析用パソコンを用いて、昨年度の研究成果を発展させたより最適な設計を行った。
また、光波の実効的な光パワー分布を表す実効断面積(Aeff)が小さい(7μm^2)PCFの最適設計も行った。これは高非線形PCFと呼ばれており、波長1.55μmで、非線形定数(n2/Aeff)が大きい(35[Wkm]^<-1>)もので、通常の光ファイバの3倍も大きく、フェムト秒ファイバレーザ等の短光パルスをこの高非線形PCFに入射すると、連続光スペクトルが発生する超広帯域のスーパーコンティニューム(SC)光源をOCTを用いて眼の3次元画像等の実用化が期待できるものである。
OCTの波長帯は、0.8μm,1.0μm及び1.3μmの光源が求められているので、非線形シュレーディンガー方程式を用いて、設計した高非線形PCFに、短光パルスを入射した時に発生する超広帯域スーパーコンティニューム(SC)光のスペクトル波形のシミューレーションを行った結果、高非線形のPCFが最適設計できた。

Report

(2 results)
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (19 results)

All 2011 2010 2009

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (7 results) Book (1 results) Patent(Industrial Property Rights) (1 results) (of which Overseas: 1 results)

  • [Journal Article] Supercontinuum generation in square photonic crystal fiber with nearly zero ultra-flattend chromatic dispersion and fabrication tolerance analysis2011

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Journal Title

      Optical Communications

      Volume: 284 Pages: 965-970

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Supercontinuum generation in photonic crystal fibers at 1.06μm, 1.31μm, and 1.55μm wavelengths2010

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Journal Title

      Electronics Letters

      Volume: 46 Pages: 1518-1520

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Measurements of mode field diameter and effective area of photonic crystal fibers by far field scanning technique2010

    • Author(s)
      K.Miyagi, Y.Namihira, S.M.A.Razzak, S.F.Kaijage, F.Begum
    • Journal Title

      Optical Review

      Volume: 17 Pages: 388-392

    • NAID

      10026494908

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Polarization-maintaining photonic crystal fibers with near-zero flattened dispersion in 1.06μm waveband for medical applications2010

    • Author(s)
      T.Kinjo, Y.Namihira, K.Arakaki, S.F.Kaliage, S.M.A.Razzak, F.Begum, et al.
    • Journal Title

      Optical Review

      Volume: 17 Pages: 66-73

    • NAID

      10026357391

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design of higly nonlinear dispersion-flattened square photoniccrystal fiber for medical applications2010

    • Author(s)
      T.Kinjo, Y.Namihira, K.Arakaki, T.Koga, S.F.Kaijage, S.M.A.Razzak, F.Begum, et al.
    • Journal Title

      Optical Review

      Volume: 17 Pages: 61-65

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flattened Chromatic Dispersion in Square Photonic Crystal Fibers with Low Confinement Losses2009

    • Author(s)
      F.Begum, Y.Namihira, et.al.
    • Journal Title

      Optical Review 16

      Pages: 54-58

    • NAID

      10025304023

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photonic Crystal Fiber with Ultra-Flattened Chromatic Dispersion, Low Confinment and Bending Losses2009

    • Author(s)
      F.Begum, Y.Namihira, et.al.
    • Journal Title

      IEEJ Trans.EIS 129

      Pages: 1039-1046

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Design and Analysis of Novel Highly Nonlinear Photonic Crystal Fibers with Ultra-flattened Chromatic Dispersion2009

    • Author(s)
      F.Begum, Y.Namihira, et.al.
    • Journal Title

      Opt.Communications 282

      Pages: 1416-1421

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Novel Broadband Dispersion Compensating Photonic Crystal Fibers : Applications in High Speed Transmission Systems2009

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Journal Title

      J.of Opt.& Laser Tech. 41

      Pages: 679-686

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Broadband Dispersion Compensationg Octagonal Photonic Crystal Fiber for Optical Communication Applications2009

    • Author(s)
      S.F.Kaijage, Y.Namihira, N.H.Hai, F.Begum, et al.
    • Journal Title

      Jpn.J.of Appl.Physics 5

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] Highly nonlinear photonic crystal fibers with ultraflattened chromatic dispersion for supercontinuum generetion at telecommunication window2010

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Organizer
      FWOCNT2010
    • Place of Presentation
      中国南京大学
    • Year and Date
      2010-12-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Supercontinuum genereted highly nonlinear photonic crystal fibers for optical communications2010

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Organizer
      FWOCNT2010
    • Place of Presentation
      中国南京大学
    • Year and Date
      2010-12-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Low splice loss squre photonic crystal fibers with ultraflattened chromatic dispersion : Applicable in optical transmission systems2010

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Organizer
      FWOCNT2010
    • Place of Presentation
      中国南京大学
    • Year and Date
      2010-12-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Highly nonlinear photonic crystal fibers for supercontinuumgeneretion at 1.06μm, 1.31μm, and 1.55μm wavelengths2010

    • Author(s)
      F.Begum, Y.Namihira, et al.
    • Organizer
      OECC2010
    • Place of Presentation
      札幌国際会議場
    • Year and Date
      2010-07-05
    • Related Report
      2010 Annual Research Report
  • [Presentation] Tailorling and Designing Birefingence of Photonic Crystal Fibres using Artificial Defects2009

    • Author(s)
      S.M.A.Razzak, Y.Namihira, F.Begum, et.al.
    • Organizer
      OFMC2009
    • Place of Presentation
      NPL, UK
    • Year and Date
      2009-10-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] Measurement of Mode Field Diameter and Effective Area of Photonic Crystal Fibres using Far-Field Scan Method2009

    • Author(s)
      K.Miyagi, Y.Namihira, et al.
    • Organizer
      OFMC2009
    • Place of Presentation
      NPL, UK
    • Year and Date
      2009-10-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] Comparison of Relationship between Aeff and MFD for Photonic Crystal Fibres with Conventional Fibres2009

    • Author(s)
      Y.Namihira, K.Miyagi
    • Organizer
      OFMC2009
    • Place of Presentation
      NPL, UK
    • Year and Date
      2009-10-16
    • Related Report
      2009 Annual Research Report
  • [Book] Optical Fibers III2011

    • Author(s)
      F.Begum, Y. Namihira
    • Total Pages
      33
    • Publisher
      Intech Open Access
    • Related Report
      2010 Annual Research Report
  • [Patent(Industrial Property Rights)] 分散補償フォトニック結晶ファイバ2010

    • Inventor(s)
      波平宜敬、ベガムフェローザ、フェリックスカイジャゲ
    • Industrial Property Rights Holder
      国立大学法人琉球大学
    • Filing Date
      2010-03-19
    • Related Report
      2009 Annual Research Report
    • Overseas

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Published: 2009-04-01   Modified: 2024-03-26  

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