Self-referenced characterization of space-time couplings in near single-cycle laser pulses

TL;DR

This paper introduces a self-referenced, single-shot method for characterizing space-time couplings in high-energy, near-single-cycle laser pulses, revealing detailed wave-front rotation and pulse front tilt measurements.

Contribution

It presents a novel self-referencing SEA-F-SPIDER technique for detailed space-time coupling characterization in ultrashort laser pulses.

Findings

Measured wave-front rotation of 2.8x10^11 rev/sec.

Observed pulse front tilts from -0.33 fs/um to -3.03 fs/um.

Demonstrated capability for single-shot, high-resolution characterization.

Abstract

We report on the characterization of space-time couplings in high energy sub-2-cycle 770nm laser pulses using a self-referencing single-shot method. Using spatially-encoded arrangement filter-based spectral phase interferometry for direct electric field reconstruction (SEA-F-SPIDER) we characterize few-cycle pulses with a wave-front rotation of 2.8x?10^11 rev/sec (1.38 mrad per half-cycle) and pulses with pulse front tilts ranging from to -0.33 fs/um to -3.03 fs/um.