Moire Apodization of Fiber Bragg Grating

2007 Fiscal Year Final Research Report Summary

• Project/Area Number: 18560338
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Kagawa University
• Principal Investigator: EJIMA Seiki Kagawa University, Faculty of Engineering, Professor (90325316)
• Co-Investigator(Kenkyū-buntansha): SUZAKI Yoshifumi Kagawa University, Faculty of Engineering, Associate Professor (60206456)
• Project Period (FY): 2006 – 2007
• Keywords: Fiber grating / Optical fiber / Fiber Bragg grating / Apodization / Optical filter / UV laser / Induced refractive index

Research Abstract

Because fiber Bragg gratings (FBGs) have very sharp, narrow-band reflection spectra, they are well suited to applications involving narrow-band optical signals, such as optical filters in optical telecommunication systems, fiber laser cavities, and various types of fiber sensors. There, the effective apodization techniques are ever strongly desired for spectrum shaping such as suppressing side-lobes.
We have developed novel technique of the apodization using two-beam interference method that controls the angle of mirror reflection by very small amount in step-wise or continuously during the time of the FBG formation by UV laser irradiation, which consequently forms superposition of FBGs of slightly different grating period and hence achieves the apodization. Experiments by two-step control of the minor angle have demonstrated very clear spectrum shaping in suppressing side-lobes. Thus the new technique appears to provide very powerful apodization technique for the FBG fabrication.
We have published the result to Japanese Journal of Applied Physics about our novel technique on two-beam interference method of FBG fabrication, to oral presentation to the conference of Japanese Applied Physics Society, and Japanese Journal of Optics about the new technique of apodization.

Research Products

• [Journal Article] "スーパーインポーズド・ファイバーグレーティングの重ね描き制限回数" (2008)
  • Author(s): 中山 恵介、池邊 竜司、坂本 賢志、山 内誠、泉川 栄二、水谷 康男、木村 進、横内 孝史、須崎 嘉文、江島 正毅
  • Journal Title: 材料,Vol.571,No.2,pp181-184(2008) 571,2 Pages: 181-185
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] "二光束干渉計を用いて作製したファイバーブラッググレーティングの反射特性におけるアポダイゼーション" (2008)
  • Author(s): 岩田 弘、安藤 真紀、中山 恵介、溝渕 博紀、泉川 栄二、水谷 康男、横内 孝史、須崎 嘉文、江島 正毅
  • Journal Title: 光学 37,3 Pages: 186-193
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Fabrication of superimposed fiber Bragg grating by two-beam interference method (2008)
  • Author(s): Keisuke, NAKAYAMA, Ryuji, IKEBE, Kenji, SAICAMOTO, Jun-pei, MOHRI, Hiroki, MIZOBUCHI, Makoto, YAMAUCHI, Eiji, IZUMIICAWA, Yasuo, MIZUTANI, Takashi, YOKOUCHI, Hiromu IWATA, Yoshifumi, SUZAKI, Seiki, EJIMA
  • Journal Title: Journal of the Society of Material Science, Japan Vol.57 No.2 Pages: 181-184
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Apodization of fiber Bragg gratings by two-beam interference method (2008)
  • Author(s): Hiromu, IWATA, Maki, ANDO, Keisuke, NAKAYAMA, Hiroki, MIZOBUCHI, Eiji, IZUMIKAWA, Yasuo, MIZUTANI, Takashi, YOKOUCHI, Yoshifumi, SUZAKI, Seiki, EJIMA
  • Journal Title: Japanese Journal of Optics Vol.37 No.3 Pages: 186-193
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] "Apodization Method Owing to the Finite Length of UV Laser Coherence in Fabricating Fiber Bragg Gratings",Jpn. J. Appl. Phys. Vol.45, No.12, pp.9100-9102 (2006) (2006)
  • Author(s): Yoshifumi SUZAKI*, Hiromu IWATA1, Keisuke NAKAYAMA+, Yasuo MIZUTAMI2, Makoto YAMAUCHI2, Eiji IZUMIKAWA2, Takashi YOKOUCHI and Seiki EJIMA
  • Journal Title: Japanese Journal of Applied Physics 45,12 Pages: 9100-9102
  • Description: 「研究成果報告書概要(和文)」より
  • Peer Reviewed
• [Journal Article] Apodization Method Owing to the Finite Length of UV Laser Coherence in Fabricating Fiber Bragg Gratings (2006)
  • Author(s): Yoshifumi, SUZAKI*, Hiromu, IWATAI, Keisuke, NAKAYAMA+, Yasuo, MIZUTAMI2, Makoto, YAMAUCHI2, Eiji, IZUMIKAWA2, Takashi, YOKOUCHI, Seiki, EJIMA
  • Journal Title: Jpn. J. Appl. Phys Vol.45 No.12 Pages: 9100-9102
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Fabrication of Superimposed Fiber Bragg Grating by Two-Beam Interference Method (2005)
  • Author(s): Keisuke, NAKAYAMA, Ryuji, IKEBE, Kenji, SAKAMOTO, Makoto, YAMAUCHI, Eiji, IZUMIKAWA, Yasuo, MIZUTANI, Susumu, KIMURA, Takashi, YOKOUCHI, Yoshifumi, SUZAKI, Seiki, EJIMA
  • Journal Title: oral presentation to the conference of Japanese Applied Physics Society at Tokushima University
  • Description: 「研究成果報告書概要(欧文)」より