Multiple hydrodynamical shocks induced by Raman effect in photonic crystal fibres

TL;DR

This paper predicts multiple hydrodynamical-like shock phenomena caused by the Raman effect in ultrashort pulse propagation within engineered photonic crystal fibers, revealing new nonlinear optical behaviors.

Contribution

It introduces a theoretical framework for understanding multiple shock formations induced by the Raman effect in photonic crystal fibers, linking it to hydrodynamical analogies.

Findings

Multiple shocks are predicted in pulse propagation due to Raman effects.

Signature of shocks observed in XFROG signals.

Mapping of the problem to hydrodynamical shock formation with gravity-like potential.

Abstract

We theoretically predict the occurrence of multiple hydrodynamical-like shock phenomena in the propagation of ultrashort intense pulses in a suitably engineered photonic crystal fiber. The shocks are due to the Raman effect, which acts as a nonlocal term favoring their generation in the focusing regime. It is shown that the problem is mapped to shock formation in the presence of a slope and a gravity-like potential. The signature of multiple shocks in XFROG signals is unveiled.