Single-Frame Characterization of Ultrafast Pulses with Spatiotemporal Orbital Angular Momentum.

ABSTRACT: Light that carries spatiotemporal orbital angular momentum (ST-OAM) makes possible new types of optical vortices arising from transverse OAM. ST-OAM pulses exhibit novel properties during propagation, transmission, refraction, diffraction, and nonlinear conversion, attracting growing experimental and theoretical interest and studies. However, one major challenge is the lack of a simple and straightforward method for characterizing ultrafast ST-OAM pulses. Using spatially resolved spectral interferometry, we demonstrate a simple, stationary, single-frame method to quantitatively characterize ultrashort light pulses carrying ST-OAM. Using our method, the presence of an ST-OAM pulse, including its main characteristics such as topological charge numbers and OAM helicity, can be identified easi

SUBMITTER: Gui G 

PROVIDER: S-EPMC9389650 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature