Modulation of dark optical fiber vector soliton molecules

Abstract

Modulating dark optical fiber vector soliton molecules are theoretically investigated in this work. An optical fiber modulation system that out of fiber laser cavity is employed as a simulation model, which can flexibly change orthogonal electric fields’ properties of original optical fiber vector solitons. We consider two cases for simulation, one is original orthogonal polarization modes have the same central wavelength in the frequency domain, the other is original orthogonal polarization modes have different central wavelengths. In the first case, modulated dark vector soliton molecules with two pulse peaks and two pulse dips, accompanied by two wavelengths can always be observed. While in the second case, optical spectra will split in orthogonal directions, and obvious temporal pulse oscillation will occur, when the projection angle changes. The results further explore modulating vector solitons that with unique characteristics, in out-cavity optical fiber modulation systems.