Ultra-compact synthesis of space-time wave packets

Space-time wave packets (STWPs) are pulsed fields in which a strictly prescribed association between the spatial and temporal frequencies yields surprising and useful behavior. However, STWPs to date have been synthesized using bulky free-space optical systems that require precise alignment. We desc...

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Bibliographic Details
Published in:Optics letters 2023-05, Vol.48 (10), p.2500-2503
Main Authors: Yessenov, Murat, Mhibik, Oussama, Mach, Lam, Hayward, Tina M, Menon, Rajesh, Glebov, Leonid, Divliansky, Ivan, Abouraddy, Ayman F
Format: Article
Language:English
Subjects:
Bragg gratings
Optical components
Phase plates
Wave packets
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Summary:Space-time wave packets (STWPs) are pulsed fields in which a strictly prescribed association between the spatial and temporal frequencies yields surprising and useful behavior. However, STWPs to date have been synthesized using bulky free-space optical systems that require precise alignment. We describe a compact system that makes use of a novel optical component: a chirped volume Bragg grating that is rotated by 45° with respect to the plane-parallel device facets. By virtue of this grating's unique structure, cascaded gratings resolve and recombine the spectrum without free-space propagation or collimation. We produce STWPs by placing a phase plate that spatially modulates the resolved spectrum between such cascaded gratings, with a device volume of 25 × 25 × 8 mm , which is orders-of-magnitude smaller than previous arrangements.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.483902