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- W2944806912 abstract "We perform ultrafast optical imaging by means of single pulse interferometry (SPI) using sub-picosecond ultrashort laser pulses. Laser-induced photoacoustic waves propagating at the sonic speed are captured in 2-D instantly without time-consuming area scanning or averaging-out of electronic noise. A common digital camera offering merely a millisecond-scale exposure is employed in synchronization with pulse picking so as to receive only a single pulse per camera frame. High fringe visibility is obtained with low background noise by blocking asynchronous spontaneous emission (ASE) mixed in source pulses by second harmonic filtering. Our proof-of-concept experimental scheme permits a 0.25 ps effective exposure time with almost ideal image contrast by optical coherence pulse gating. The 2-D ultrafast imaging capability is evaluated through a pump-probe measurement of a 60.8 MHz laser-induced photoacoustic wave in liquid." @default.
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- W2944806912 date "2019-10-01" @default.
- W2944806912 modified "2023-10-15" @default.
- W2944806912 title "Direct instantaneous 2-D imaging for photoacoustic waves by ultrashort single pulse interferometry" @default.
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- W2944806912 doi "https://doi.org/10.1016/j.optlaseng.2019.04.027" @default.
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