Modulation instability induced by periodic power variation in soliton fiber ring lasers

TL;DR

This paper investigates how periodic power variations induce modulation instability and subsideband generation in soliton fiber ring lasers, revealing the influence of cavity phase delay and polarization interactions.

Contribution

It demonstrates the relationship between power variation, wavelength shifts, and cavity parameters, providing new insights into controlling modulation instability in fiber lasers.

Findings

Periodic power variation causes subsideband generation.

Wavelength shifts depend on the power variation period.

Polarization interactions induce the power variation.

Abstract

Modulation instability with subsideband generation induced by periodic power variation in soliton fiber ring lasers is reported. We found that different wavelength shifts of subsideband generation are related to different periodic power variation. The period of power variation and wavelength shifts of subsideband can be changed by altering the linear cavity phase delay. It is also found that the periodic power variation is caused by the interaction between the nonuniform polarization state of the circulating light and the polarizer in the laser cavity.