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Temporal Talbot effect in free space
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DOI：10.1364/OL.425635.png)
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The temporal Talbot effect refers to the periodic revivals of a pulse train propagating in a dispersive medium and is a temporal analog of the spatial Talbot effect with group-velocity dispersion in time replacing diffraction in space. Because of typically large temporal Talbot lengths, this effect has been observed to date in only single-mode fibers, rather than with freely propagating fields in bulk dispersive media. Here we demonstrate for the first time, to the best of our knowledge, the temporal Talbot effect in free space by employing dispersive space-time wave packets, whose spatiotemporal structure induces group-velocity dispersion of controllable magnitude and sign in free space. (C) 2021 Optical Society of America
Keyword:
TIME WAVE-PACKETS
ANGULAR-DISPERSION
LIGHT
DIFFRACTION
BEAMS
MULTIPLICATION
PROPAGATION
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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