Interferometric method for the complete characterization of highly chirped ultrabroadband pulses

TL;DR

This paper introduces CHIMP, an interferometric technique that accurately characterizes highly chirped ultrabroadband pulses by measuring their group delay dispersion, verified through simulations and experiments at 800nm.

Contribution

The paper presents a novel interferometric method, CHIMP, for complete characterization of highly chirped ultrabroadband pulses, providing a simple algorithm for GDD measurement.

Findings

Successfully measured GDD of pulses with 55nm bandwidth stretched to 32ps

Verified method through simulations and experimental data

Achieved accurate pulse characterization at 800nm

Abstract

This article describes an interferometric method, called "Chirped Heterodyne Interferometry for Measuring Pulses" (CHIMP), for the complete characterization of highly (monotonically) chirped ultrabroadband optical pulses. CHIMP provides the spectrally dependent group delay dispersion (GDD) of the a chirped test pulse (CTP) via a simple direct algorithm and is verified via second harmonic generation (SHG) simulations and experimental measurements of pulses centred at 800nm with a bandwidth of 55nm stretched to 32ps at the 1% intensity level, corresponding to a time-bandwidth product of 830.