Fig. 1. The threshold invert population versus output reflectivity

Fig. 2. Under the condition of R₁=0.60，R₂=0.95，the dual-wavelength pulses time characteristics with different pump rates

Fig. 3. Under the condition of type-Ⅲ，the pump rate and pulse repeat frequency versus output reflectivity

Fig. 4. Experimental setup of dual-wavelength orthogonally polarized passively Q-switched laser based on Nd∶GdVO₄ crystal

Fig. 5. The stimulated emission cross-section spectra of the Nd∶GdVO₄ crystal with 20 ℃

Fig. 6. The output time characteristic of Nd∶GdVO₄ laser with different pump powers and the optical spectra for Nd∶GdVO₄ laser at a pump power of 5.51 W

Fig. 7. The laser beam qualities of the π-polarized and σ-polarized laser with the pump power of 5.51 W