Fig. 1. PC versus cavity length at different r_A

Fig. 2. Structural diagram of large core diameter crystal rectangular waveguide with schematic of waveguide end face shown in inset

Fig. 3. Experimental setup of large core diameter crystal rectangular waveguide mode-locked laser

Fig. 4. Radius distribution curve of light spot in cavity

Fig. 5. Mode-locking experiment results. (a) Output power versus absorption power of pump light; (b) spectrum curve of output laser

Fig. 6. Laser characteristics at maximum output power. (a) CWML pulse train; (b) radio frequency spectrum with spectrum in 200 MHz range shown in inset; (c) autocorrelation trace; (d) output beam diameter versus propagation distance of output beam with measured far-field spot shown in inset