Broadband space-time wave packets propagating 70  m

The propagation distance of a pulsed beam in free space is ultimately limited by diffraction and space-time coupling. "Space-time" (ST) wave packets are pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits...

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Bibliographic Details
Published in:Optics letters 2019-04, Vol.44 (8), p.2073-2076
Main Authors: Bhaduri, Basanta, Yessenov, Murat, Reyes, Danielle, Pena, Jessica, Meem, Monjurul, Fairchild, Shermineh Rostami, Menon, Rajesh, Richardson, Martin, Abouraddy, Ayman F
Format: Article
Language:English
Subjects:
Broadband
Laser damage
Phase plates
Propagation
Pulse propagation
Spacetime
Wave diffraction
Wave packets
Wave propagation
Wildcats
Yield point
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Summary:The propagation distance of a pulsed beam in free space is ultimately limited by diffraction and space-time coupling. "Space-time" (ST) wave packets are pulsed beams endowed with tight spatio-temporal spectral correlations that render them propagation-invariant. Here we explore the limits of the propagation distance for ST wave packets. Making use of a specially designed phase plate inscribed by gray-scale lithography and having a laser-damage threshold of ∼0.5  J/cm , we synthesize a ST light sheet of width ≈700  μm and bandwidth ∼20  nm, and confirm a propagation distance of ≈70  m.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.002073