周波数チャープパルスを用いたスペクトラルイメージング によるシングルショット25フレーム超高速撮影

抄録

We demonstrate a simple method for realizing STAMP (Sequentially Timed All-optical Mapping Photography) in a compact 4f configuration utilizing spectral filtering: STAMP utilizing Spectral Filtering (SF-STAMP). SF-STAMP system consists of a diffractive optical element (DOE), a band-pass filter (BPF), and two Fourier transform lenses. SF-STAMP system works as a single-shot multispectral imaging system. Using a linearly frequency-chirped laser pulse, ultrafast 2D-burst imaging is realized. The number of multispectral images captured by a single shot is determined by the DOE, which is 25 in our current system. We capture ultrafast phenomena with sub-picosecond temporal resolution using a frequency-chirped Ti:sapphire laser pulse.