Single-frame characterization and nonlinear conversion of ultrafast vortex pulses carrying spatiotemporal orbital angular momentum

Chen-Ting Liao; Guan Gui; Nathan J. Brooks; Bin Wang; Henry C. Kapteyn; Margaret M. Murnane

doi:10.1117/12.2649114

17 March 2023 Single-frame characterization and nonlinear conversion of ultrafast vortex pulses carrying spatiotemporal orbital angular momentum

Chen-Ting Liao, Guan Gui, Nathan J. Brooks, Bin Wang, Henry C. Kapteyn, Margaret M. Murnane

Author Affiliations +

Proceedings Volume PC12436, Complex Light and Optical Forces XVII; PC1243607 (2023) https://doi.org/10.1117/12.2649114
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Spatiotemporal orbital angular momentum (ST-OAM) of light is an emergent, spatiotemporally sculptured light. Such spatiotemporal optical vortices carry transverse OAM and exhibit novel properties. However, the lack of a simple and straightforward characterization method substantially slows its progress and potential adaptions for future applications. Here we demonstrated a simple, stationary, single-frame method to quantitatively characterize ST-OAM pulses. Our new method can measure the presence of ST-OAM, space-time topological charge numbers, OAM helicity, pulse dispersion, and beam divergence. We also investigated the nonlinear properties of ST-OAM pulses, uncovering the conservation of space-time topological charges in a second-harmonic generation process.

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Citation Download Citation

Chen-Ting Liao, Guan Gui, Nathan J. Brooks, Bin Wang, Henry C. Kapteyn, and Margaret M. Murnane "Single-frame characterization and nonlinear conversion of ultrafast vortex pulses carrying spatiotemporal orbital angular momentum", Proc. SPIE PC12436, Complex Light and Optical Forces XVII, PC1243607 (17 March 2023); https://doi.org/10.1117/12.2649114

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