Interaction between chirped bright and dark solitons in silicon-on-insulator waveguides

Abstract

The interaction between chirped bright solitons and dark solitons propagating in a silicon-on-insulator waveguide (SOI) is numerically simulated through a nonlinear coupled-wave Schrödinger equation satisfied by the SOI waveguides and the distributed Fourier transform. The simulation results show that a positive and negative chirp will affect the compression and broadening of bright solitons and increase the effective transmission distance of bright solitons. The increase in the power and the pulse width of the bright solitons will also affect the stable transmission of dark solitons, which will greatly deform the main pulse of dark solitons and aggravate the front oscillation of the dark solitons. Negative chirps can promote the broadening and the consumption of bright solitons and reduce the influence on dark solitons. The increased power and the pulse width of negatively-chirped bright solitons can also increase the effective transmission distance of bright solitons, but these changes have less effect on the dark solitons than positively-chirped bright solitons, and the transmission of dark solitons is more stable