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High efficiency THz pulse generatin with a regenerative optical-rectification

Research Project

Project/Area Number 24760044
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Applied optics/Quantum optical engineering
Research InstitutionOsaka University

Principal Investigator

NAGAI Masaya  大阪大学, 基礎工学研究科, 准教授 (30343239)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsテラヘルツ / 高効率 / 超短光パルス / 光整流 / 高強度 / 非線形光学 / 非線形結晶 / テラヘルツ光 / 波長変換 / THz波発生
Research Abstract

We experimentally demonstrate the generation and detection of broadband THz pulses with a bandwidth extending beyond 4 THz by using a 1.04-um Yb-doped fiber laser with a pulse duration of 0.48 ps. Owing to higher-order nonlinear processes in LiNbO3 crystals, THz pulses can be emitted efficiently with a bandwidth extending beyond the boundaries of the spectral width of the excitation pulse. By compressing divided sampling pulses to as short as 80 fs, we detected the THz pulse in the full spectral range, which could not be resolved with the original pulse. The precise control of the nonlinear effects and the compression of the sampling pulses compensated for the disadvantage of using a 1-um fiber laser. This work will contribute to the progress of nonlinear THz spectroscopy and imaging.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (4 results)

All 2014 Other

All Journal Article (1 results) Presentation (3 results)

  • [Journal Article] Generation and Detection of THz Pulses with a Bandwidth Extending Beyond 4 THz Using a Sub-picosecond Yb-doped Fiber Laser System2014

    • Author(s)
      Masaya Nagai, Eiichi Matsubara, Masaaki Ashida, Jun Takayanagi, and Hideyuki Ohtake
    • Journal Title

      IEEE Transactions on Terahertz Science and Technology

      Volume: (in press)

    • Related Report
      2013 Final Research Report
  • [Presentation] サブピコ秒光パルス光源を用いた広帯域THz光発生と検出2014

    • Author(s)
      永井正也,森川慎吾,松原英一,芦田昌明,高柳順,大竹秀幸
    • Organizer
      第61回応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学(17p-E17-14)
    • Year and Date
      2014-03-14
    • Related Report
      2013 Final Research Report
  • [Presentation] サブピコ秒光パルス光源を用いた広帯域THz 光発生と検出2014

    • Author(s)
      永井正也, 森川慎吾, 松原英一, 芦田昌明, 高柳順, 大竹秀幸
    • Organizer
      第61回応用物理学会春季学術講演会
    • Place of Presentation
      青山学院大学
    • Related Report
      2013 Annual Research Report
  • [Presentation] THz time-domain spectroscopy beyond 4 THz using a sub-picosecond Yb-doped fiber laser system

    • Author(s)
      M. Nagai, E..Matsubara, M. Ashida, J. Takayanagi, and H. Ohtake
    • Organizer
      The 39th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2014)
    • Place of Presentation
      (accepted)
    • Related Report
      2013 Final Research Report

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Published: 2013-05-31   Modified: 2019-07-29  

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