Nonlinear Femtosecond Pulse Reshaping in Waveguide Arrays

TL;DR

This paper demonstrates how femtosecond pulses undergo nonlinear reshaping when propagating through a waveguide array, with experimental results aligning with theoretical predictions, highlighting potential for ultrafast optical control.

Contribution

It presents experimental observation of nonlinear pulse reshaping in waveguide arrays using femtosecond pulses, confirming theoretical models of power-dependent pulse shortening.

Findings

Pulse reshaping depends on input power levels.

Pulse shortening observed in the central waveguide.

Experimental results agree with theoretical predictions.

Abstract

We observe nonlinear pulse reshaping of femtosecond pulses in a waveguide array due to coupling between waveguides. Amplified pulses from a mode-locked fiber laser are coupled to an AlGaAs core waveguide array structure. The observed power-dependent pulse reshaping agrees with theory, including shortening of the pulse in the central waveguide.