Numerical model of dual-wavelength erbium-doped fiber ring laser based on gain-equilibrium method

A novel numerical model of the dual-wavelength fiber ring lasers utilizing gain-equilibrium method is presented by developing the two level, homogeneous Giles model. To obtain the simulation method, the gain equilibrium condition is derived and modified to account for the iterative procedure in simulations. This condition is confirmed by both the numerical and experimental results, which indicate that the cavity losses of both wavelength channels play an important role in maintaining stable dual-wavelength emitting. The tolerant loss-bias is 0.05 dB in simulation which indicated that the loss vibrations play an impotent role in this effect.