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1997 Fiscal Year Final Research Report Summary

A study on fundamentals and applications of a fuzzy mode laser

Research Project

Project/Area Number 07455030
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionTohoku University

Principal Investigator

ITO Hiromasa  Tohoku University, Research Institute of Electrical Communication, Professor, 電気通信研究所, 教授 (20006274)

Co-Investigator(Kenkyū-buntansha) SATO Manabu  Tohoku University, Research Institute of Electrical Communication, Research Asso, 電気通信研究所, 助手 (50226007)
Project Period (FY) 1995 – 1997
KeywordsFrequency-shifted feedback / frequency chirp / solid-state laser / reflectometry
Research Abstract

In this research project, oscillation mechanisms and applications a fuzzy mode laser was extensively investigated.
As to the oscillation mechanisms, we clarified for the first time that an output of the fuzzy mode laser consists of a chirped frequency comb. The chirped frequency comb has unique properties such as (a) ultra fast chirp rate (>200 PHz/s), (b) high frequency chirp linearity, and (c) highly phasecorrelated comb components. A theoretical analysis of the fuzzy mode laser was also carried out and it could explain well the oscillation mechanisms of the fuzzy mode laser.
A potential application of the fuzzy mode laser is an optical frequency domain reflectometry (OFDR). In this reseach project, we establishied a basis needed to realize the long distance, high accuracy OFDR by the fuzzy mode laser. In the experiment, a spatial accuracy of 50 mum was obtained at the distance of 4km.
In conclusion, this research clarified the oscillation mechanisms of the fuzzy mode laser, and an application of OFDR was successfully demonstrated.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] K.Nakamura: "Inteferoncetric studies on a diade-puwped Nd:YXO_4 laser with fregary-shifted feedback" Optics Coommunications. 120. 134-140 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koichiro Nakamura: "Spectral Characteristics of an all solid-state fregueuay-shfted feedback lasor" IEEE Journal of Quautuin Electronics. 33. 103-111 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kunio Kasahara: "Spedral dyranics of an all sdid-state freguercy-shifted feadback laser" Optical Review. 4. 180-184 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kunio Kasahara: "Spedral dyranics of an all sdid-state freguercy-shifted feadback laser" Optical Review. 22. 889-891 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kunio Kasahara: "Dyuanic Propertise of an all solid-state fregueucy-shifted feedback laser" IEEE Journal of Quartun Electronics. 34. 190-203 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Frank V. Kowalski: "Fraguency-shifted feedback laser:Conthious or stepwise fregueucy shirped output?" Optics Co,,unications. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Nakamura, K.Kasahara, M.Sato, and H.Ito: ""Interfermetric studies on a diode-pumped Nd : YVO_4 laser with frequency-shifted feedback"" Optics Communications. vol.120, no.4-6. 134-140 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichiro Nakamura, Fumitoshi Abe, Kumio Kasahara, Takefumi Hara, Manabu Sato, and Hiromasa Ito: ""Spectral Characteristics of An All Solid-State Frequency-Shifted Feedback Laser"" IEEE Journal of Quantum Electronics. vol.33, no.1. 103-111 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kumio Kasahara, Koichiro Nakamura, Manabu Sato, and Hiromasa Ito: ""Spectral Dynamics of An All Solid-State Frequency-Shifted Feedback Laser"" Optical Review. Vol.4, No 1B. 180-184 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichiro Nakamura, Frank V.Kowalski, and Hiromasa Ito: ""Chirped-frequency generation in a translated-grating-type frequency-shifted feedback laser"" Optics Letters. Vol.22, No.12. 889-891 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kumio Kasahara, Koichiro Nakamura, Manabu Sato, and Hiromasa Ito: ""Dynamic Properties of an All Solid-State Frequency-Shifted Feedback laser"" IEEE Journal of Quantum Electronics. Vol, 34, No.1. 190-203 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Frank V.Kowalski, Koichiro Nakamura, and Hiromasa Ito: ""Frequency shifted feedback lasers : Continuous or stepwise frequency chirped output? "" Optics Communications. (accepted for publication). (1997)

    • 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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