Transient-grating single-shot supercontinuum spectral interferometry (TG-SSSI)

TL;DR

This paper introduces TG-SSSI, a novel single-shot technique for measuring the detailed space- and time-resolved amplitude and phase of ultrashort laser pulses, including those with complex spatiotemporal structures.

Contribution

The paper presents a new method, TG-SSSI, capable of characterizing ultrashort pulses with singularities in a single shot, advancing ultrafast laser diagnostics.

Findings

Successful space-time imaging of short pulses with spatiotemporal optical vortices

Effective characterization of pulses with spin and orbital angular momentum

Demonstration of the method's suitability for complex ultrashort pulses

Abstract

We present a technique for the single-shot measurement of the space- and time-resolved spatiotemporal amplitude and phase of an ultrashort laser pulse. The method, transient-grating single-shot supercontinuum spectral interferometry (TG- SSSI), is demonstrated by the space-time imaging of short pulses carrying spatiotemporal optical vortices (STOVs). TG-SSSI is well-suited for characterizing ultrashort laser pulses that contain singularities associated with spin/orbital angular momentum or polarization.