A Peregrine soliton-like structure that has nothing to deal with a Peregrine breather

TL;DR

This paper reports experimental observations of a Peregrine soliton-like structure in optical fibers, which is ultimately attributed to Brillouin backscattering rather than true Peregrine soliton dynamics.

Contribution

It demonstrates that certain Peregrine-like features can arise from Brillouin backscattering, challenging the interpretation of such structures as genuine Peregrine solitons.

Findings

Observed Peregrine-like intensity peaks in fibers.

Attributed peaks to Brillouin backscattering, not Peregrine dynamics.

Highlights the importance of distinguishing physical mechanisms in nonlinear fiber experiments.

Abstract

We report on experimental results where a temporal intensity profile presenting some of the main signatures of the Peregrine soliton (PS) is observed. However, the emergence of a highly peaked structure over a continuous background in a normally dispersive fiber cannot be linked to any PS dynamics and is mainly ascribed to the impact of Brillouin backscattering.