Comparison of comb-line generation from InGaAsP/InP integrated ring mode-locked lasers

We compare comb-line generation from a 30 GHz gain flattened ring mode-locked laser and two standard 30 GHz ring mode-locked lasers. The gain flattened ring has a 1.32 THz spectral width whereas the other devices have 420 and 630 GHz spectral widths.