Fig. 1. Cross-sectional diagram of rectangular waveguide

Fig. 2. Relative gain of each mode versus thickness of core layer when I=I_sat

Fig. 3. Relative gain of each mode versus thickness of core layer when I=10I_sat

Fig. 4. Relative gain versus thickness of core layer under different Δn

Fig. 5. Relative gain versus thickness of core layer under different wavelengths

Fig. 6. Structural diagram of crystal rectangular waveguide

Fig. 7. Photo of crystal waveguide and micrograph of core layer

Fig. 8. Experiment device of laser oscillator. (a) Schematic; (b) photo

Fig. 9. Output power versus absorbed pump power

Fig. 10. Beam quality of output beam