Improved temporal contrast of streak camera measurements with periodic shadowing

in: Optics Letters (2021)
Bao, Yupan; Kornienko, Vassily; Lange, David; Kiefer, Wolfgang; Eschrich, Tina; Jäger, Matthias; Bood, Joakim; Kristensson, Elias; Ehn, Andreas
Periodic shadowing, a concept used in spectroscopy for stray light reduction, has been implemented to improve the temporal contrast of streak camera imaging. The capabilities of this technique are first proven by imaging elastically scattered picosecond laser pulses and are further applied to fluorescence lifetime imaging, where more accurate descriptions of fluorescence decay curves were observed. This all-optical approach can be adapted to various streak camera imaging systems, resulting in a robust technique to minimize space-charge induced temporal dispersion in streak cameras while maintaining temporal coverage and spatial information.

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