Generating highly dark-bright solitons by gaussian beam propagation in a panda ring resonator

A novel system for generating dark-bright solitons is proposed. The system uses a PANDA ring resonator incorporated with an add/drop filter system. With resonant conditions, chaotic signals are generated from the through and drop ports of the PANDA system and then propagated in the add/drop filter system. Simulation results show that inputting Gaussian pulses in the system generates and controls highly dark-bright signals. To increase system capacity and obtain the required channel signals, we select 20, 100, and 400 μm as the radii of the add/drop filter system. The central wavelength of input power is 1.55 μm, by which ultrashort dark-bright soliton pulses are generated. The simulation results for the wavelength-dependent soliton pulses show full widths at half maximum (FWHMs) of 2.1, 0.42, and 0.11 nm, as well as free spectral ranges (FSRs) of 5.75, 1.15, and 0.29 nm. These values correspond to 20, 100, and 400 μm, respectively. The simulated time-dependent soliton pulses have FWHMs of 8.1, 9.2, and 15.3 ps with a constant FSR of 25 ps. A maximum output power of 80 W can be obtained from the drop port of the PANDA system.