Multiwavelength Passively Mode Locked Fiber Laser: all normal dispersion

TL;DR

This paper demonstrates the generation of multiwavelength gain-guided solitons in an all-normal dispersion fiber laser passively mode-locked with a SESAM, revealing stable multiwavelength operation influenced by cavity birefringence.

Contribution

It introduces a novel all-normal dispersion fiber laser setup capable of stable multiwavelength mode locking with detailed analysis of the underlying nonlinear interactions.

Findings

Stable single-, dual-, and triple-wavelength mode locked GGSs observed

Multiwavelength operation controlled by cavity birefringence

Nonlinear interactions enable multiwavelength generation in normal dispersion fiber lasers

Abstract

We report on the generation of multiwavelength gain-guided soliton (GGS) in an all normal dispersion birefringent fiber laser passively mode-locked with a semiconductor saturable absorber mirror (SESAM). Determined by the cavity birefringence, we observe the stable single-, dual- and triple- wavelength mode locked GGSs, which is a natural consequence of the mutual nonlinear interaction among the normal cavity dispersion, cavity fiber nonlinear Kerr effect, laser gain saturation and bandwidth limitation resulting from the intra-cavity birefringent filter.