Abstract

Generation of solitonic pulses from stimulated Brillouin backscat-tering (SBBS) or stimulated Raman backscattering (SRBS) in a cw-pumped fiber-ring laser of large gain is only controlled by the feedback Stokes intensity R. The nonlinear dynamics of SBBS or SRBS in monomode optical fibers, including the optical Kerr effect, is governed by the 1-D coherent three-wave model, which resonantly couples two optical waves (pump and backscattered Stokes) with a material wave. Stability analysis around the steady solution presents a regular Hopf bifurcation with R as control parameter. For R < R crit the unstable amplitude modes merge together into a localized pulse, giving rise to soliton morphogenesis. Numerical simulation of the dynamical model starting from any initial conditions (material noise or steady state), and experiments in an optical fiber-ring cavity confirm this bifurcation and the generation of an asymptotically stable train of solitonic pulses of nanosecond width for SBBS and picosecond width for SRBS.

Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call