Space-time wave packets (STWPs) are pulsed fields with non-separable spatio-temporal structure that yields exotic and useful behavior. To date, STWPs have been synthesized using bulky free-space optical systems that require precise alignment. Here, we describe a compact system based on an alternative strategy for spatially resolving the spectrum, which makes use of a volume chirped Bragg grating with Bragg structure rotated by 45degree with respect to device facets. Consequently, the field exits spectrally-resolved from a facet orthogonal to the entrance. We synthesize STWPs using a pair of such devices occupying a volume of 25×25×8mm3, which is orders-of-magnitude smaller than previously.
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