• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of Broadband mid-IR sources via FDML

Research Project

Project/Area Number 21K20500
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Nakamura Tauma  東京大学, 大学院理学系研究科(理学部), 特任助教 (40906252)

Project Period (FY) 2021-08-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsMid IR laser / Intra-pulse DFG / Raman spectroscopy / Raman Spectroscopy / モード同期レーザー / 中赤外光源 / 分光 / 高速分光 / 波長掃引レーザー / タイムストレッチ分光
Outline of Research at the Start

2台の高速波長掃引レーザーを活用して、掃引レートと同等のμsレベルにリニアチャープした広帯域中赤外光源を開発する。申請者の考案する“全帯域位相整合スキャン“により7.5-10 μmを含む広帯域スペクトルを発生する。μsのリニアチャープを生かすと、単一ディテクタによるシンプルな測定系で高速かつ高感度な広帯域赤外吸収分光を実現できる。このことにより、フローサイトメーターを用いた高速なラベルフリーの生体細胞測定等、赤外分光を必要とする多様な応用分野での活用が期待できる。

Outline of Final Research Achievements

We developed the robust 12fs, 3.3W, 50MHz mode-locked laser based on Yb:fiber laser system. Using this laser, Broadband intra-pulse DFG with more than 1 mW output has been developed, which is the first demonstration of Broadband intra-pulse DFG via 1um fiber lasers.
With this ultrashort pulse laser, we also developed broadband Raman Spectroscopy system. By utilizing Time-stretch method, we achieved a record acquisition rate of 50 Mspectra/s was achieved, which corresponds to 500 times faster than previous state-of-the-art. This spectroscopy gives the fastest temporal resolution, which has a great potential to reveal unknown ultrafast molecular dynamics.

Academic Significance and Societal Importance of the Research Achievements

分子の指紋領域を一括で取得する事が可能である広帯域な中赤外光源は非常に高い需要があるが、今日の最先端のレーザー技術をもってしても、十分なスペクトル幅や、輝度、高い繰り返し周波数、システムの安定性のすべてを兼ね備える事は非常に困難である。高輝度化で有利な1umで広帯域中赤外光を実現できた意義は大きい。
また、開発したラマン分光システムは、分子指紋領域における従来のいかなる手法と比較しても世界最速の分光を実現できた。このことは今までアクセスが出来なかったsub-usの分子のダイナミクス解明に大きな寄与をもたらすと考えられる。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2023 2022

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Open Access: 1 results,  Peer Reviewed: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Broadband coherent Raman scattering spectroscopy at 50,000,000 spectra/s2023

    • Author(s)
      Takuma Nakamura, Kazuki Hashimoto, and Takuro Ideguchi
    • Journal Title

      arXiv

      Volume: NA

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Simple approach to broadband mid-infrared pulse generation with a mode-locked Yb-doped fiber laser2022

    • Author(s)
      Nakamura Takuma、Ramaiah Badarla Venkata、Hashimoto Kazuki、Schunemann Peter G.、Ideguchi Takuro
    • Journal Title

      Optics Letters

      Volume: 47 Issue: 7 Pages: 1790-1790

    • DOI

      10.1364/ol.450921

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Time-Stretch Coherent Raman Scattering Spectroscopy Running at 50,000,000 Spectra/s2023

    • Author(s)
      Takuma Nakamura, Kazuki Hashimoto, and Takuro Ideguchi
    • Organizer
      CLEO 2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2021-10-22   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi