Ultrafast single-shot burst imaging in a few-nanosecond window using a spectrally sweeping laser pulse train

Hirofumi Nemoto, Takakazu Suzuki, Kazuki Matsushita, Kazuki Takasawa, Fumihiko Kannari

    研究成果: Conference contribution

    抄録

    To capture ultrafast non-repeatable phenomena, we had developed two methods of single-shot ultrafast two-dimensional (2D)- imaging of sequentially timed all-optical mapping photography (STAMP) [1] and STAMP utilizing spectral filtering (SF-STAMP) [2, 3]. In these STAMP schemes, spectral images measured by a linearly frequency-chirped laser pulse corresponds to time-resolved snapshots. So far, we achieved single-shot burst imaging of ultrafast phenomena in picosecond time windows with sub-picosecond temporal resolutions. However, it is not straightforward to extend the time window beyond 10 ps by a conventional method to chirp the probe laser pulse using material dispersion. Currently, we applied a new scheme of free-space angular-chirp-enhanced delay (FACED) [4] composed of a tilted pair of mirrors to SF-STAMP and achieved a sub-ns time window [5]. In this work, we generated spectrally sweeping burst pulses with a 300-ps-pulse interval by FACED, and captured single-shot ultrafast 2D-burst images with a few-nanosecond time window. Furthermore we combined a 1-kfps fast camera. Repetitive laser ablation was captured with 10-frame, 300-ps interval images at every 1 ms.

    本文言語English
    ホスト出版物のタイトルThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
    出版社OSA - The Optical Society
    ISBN(電子版)9781557528209
    出版ステータスPublished - 2019 1 1
    イベントThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019 - Munich, Germany
    継続期間: 2019 6 232019 6 27

    出版物シリーズ

    名前Optics InfoBase Conference Papers
    Part F140-CLEO_Europe 2019

    Conference

    ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe_2019
    CountryGermany
    CityMunich
    Period19/6/2319/6/27

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Mechanics of Materials

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