Multiwavelength Generation of Dual-Cavity Brillouin/Erbium Fiber Lasers

Dual-cavity Brillouin/erbium fiber laser demonstrate a multiwavelength output in a cavity comprises of nonlinear Brillouin gain and linear EDF gain. The system consists of two erbium-doped fiber lasers EDFL sharing a single mode fiber to produce bidirectional Stokes signals. One of the cavities was made to incur a higher cavity loss and this results in a wavelength-shift of the EDF peak gain. The cavity coupling leads to a slightly broader EDF peak gain and hence increases the number of Stokes lines. The dual-cavity BEFL generates an output of 22 GHz-comb 2×15-channels at 1560 nm that can be used for DWDM system.