Figure 1
From: Synchronised dual-wavelength mode-locking in waveguide lasers

(a) Examples of g0 for N = 0, 0.5 and 1, respectively. The horizontal line α denotes the cavity loss. Only the part of the gain that is above α contributes to the amplification of the laser pulse in the cavity. (b) An illustration of the ring cavity used in the simulation. DM: dichroic mirror, SAM: saturable absorber mirror.