Cross-Phase Modulation Instability in PM ANDi Fiber-Based Supercontinuum Generation

TL;DR

This paper reports broadband supercontinuum generation in polarization-maintaining fiber and identifies a cross-phase modulation instability sideband, which can be controlled by fiber polarization, supported by theoretical modeling and experiments.

Contribution

It introduces the observation and control of a cross-phase modulation instability sideband in supercontinuum generation within PM fiber, supported by theoretical analysis.

Findings

Identification of a polarization-dependent sideband outside the supercontinuum

Suppression of the sideband by pumping on the fast axis

Good agreement between experimental data and theoretical models

Abstract

We demonstrate broadband supercontinuum generation in an all-normal dispersion polarization-maintaining photonic crystal fiber and we report the observation of a cross-phase modulation instability sideband that is generated outside of the supercontinuum bandwidth. We demonstrate this sideband is polarized on the slow axis and can be suppressed by pumping on the fiber's fast axis. We theoretically confirm and model this nonlinear process using phase-matching conditions and numerical simulations, obtaining good agreement with the measured data.