TY - GEN
T1 - Single-shot burst imaging of ultrafast phenomena with sub-picosecond resolution and sub-nanosecond time window
AU - Suzuki, Takakazu
AU - Hida, Ryohei
AU - Yamaguchi, Yuki
AU - Kannari, Fumihiko
N1 - Funding Information:
This research was supported by a Grant-in-aid from the Ministry of Education, Culture, Sports, Science, and Technology, Japan for the Photon Frontier Network Program, and in part by a research assistantship of a Grant-in-Aid to the Program for Leading Graduate School of Keio University for “Science for Development of Super Mature Society” from the Ministry of Education, Culture, Sport, Science, and Technology in Japan.
Publisher Copyright:
© 2018 Optics InfoBase Conference Papers. All rights reserved.
PY - 2017
Y1 - 2017
N2 - For capturing ultrafast phenomena in sub-nanosecond (10 -10 s) time region in a single-shot basis, we modified STAMP (Sequentially timed all-optical mapping photography) utilizing spectral filtering (SF-STAMP). Our SF-STAMP system consists of a 25-beam-generating diffractive optical element (DOE), a bandpass filter (BPF) or BPF-array, and two Fourier transform lenses. This system duplicates 25-multispectral images simultaneously. Therefore, a linearly frequency-chirped pulse makes spectrally and temporally resolved snapshot-images with the temporal resolution determined by the bandwidth of the wavelength selected by the BPFs. The combination of the DOE and BPF enables to select bandwidth of ~40 nm for each flame, and the BPF-array chooses the entire spectrum ranging from 660 to 810 nm. The observation time window in a single-shot can be tuned from sub-picosecond (10 -13 s) to sub-nanosecond (10 -10 s) by controlling the second-order dispersion added to the laser pulse. In this work, we demonstrate 25-frame SF-STAMP system with two-kinds of BPF configuration (a tilted single BPF or BPF-array) and a frequency-chirped laser pulse broadened from 650 to 900 nm. Ultrafast 2D-burst images of crystalline-to-amorphous phase transition of Ge2Sb2Te5 and laser ablation process are captured with sub-picosecond to sub-nanosecond time windows.
AB - For capturing ultrafast phenomena in sub-nanosecond (10 -10 s) time region in a single-shot basis, we modified STAMP (Sequentially timed all-optical mapping photography) utilizing spectral filtering (SF-STAMP). Our SF-STAMP system consists of a 25-beam-generating diffractive optical element (DOE), a bandpass filter (BPF) or BPF-array, and two Fourier transform lenses. This system duplicates 25-multispectral images simultaneously. Therefore, a linearly frequency-chirped pulse makes spectrally and temporally resolved snapshot-images with the temporal resolution determined by the bandwidth of the wavelength selected by the BPFs. The combination of the DOE and BPF enables to select bandwidth of ~40 nm for each flame, and the BPF-array chooses the entire spectrum ranging from 660 to 810 nm. The observation time window in a single-shot can be tuned from sub-picosecond (10 -13 s) to sub-nanosecond (10 -10 s) by controlling the second-order dispersion added to the laser pulse. In this work, we demonstrate 25-frame SF-STAMP system with two-kinds of BPF configuration (a tilted single BPF or BPF-array) and a frequency-chirped laser pulse broadened from 650 to 900 nm. Ultrafast 2D-burst images of crystalline-to-amorphous phase transition of Ge2Sb2Te5 and laser ablation process are captured with sub-picosecond to sub-nanosecond time windows.
KW - Chirped pulse
KW - Component
KW - Photography
KW - Single-shot measurement
KW - Ultrafast imaging
KW - Ultrafast optics
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M3 - Conference contribution
AN - SCOPUS:85059525905
SN - 9781509062904
T3 - Optics InfoBase Conference Papers
BT - Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
PB - OSA - The Optical Society
T2 - Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2017
Y2 - 31 July 2017 through 4 August 2017
ER -