Fig. 1. Experimental equipment for testing anisotropy of Cr4+∶YAG crystal

Fig. 2. Relative position between polarization direction of incident laser and crystal axis of Cr4+∶YAG. (a) [100]-cut; (b) [110]-cut

Fig. 3. 1064 nm laser transmittance of Cr4+∶YAG in different cutting directions (initial transmittance is 30%)

Fig. 4. 1064 nm laser transmittance of Cr4+∶YAG at different power densities (initial transmittance is 30%). (a) [100]-cut; (b) [110]-cut

Fig. 5. 1064 nm laser transmittance under different initial transmissions of Cr4+∶YAG. (a) [100]-cut; (b) [110]-cut

Fig. 6. Diagram of passively Q-switched Nd∶YAG/Cr4+∶YAG laser with linear polarization pump

Fig. 7. Output pulse of [100]-cut Cr4+∶YAG Q-switched laser. (a) Pulse width; (b) repetition rate

Fig. 8. Output pulse of [110]-cut Cr4+∶YAG Q-switched laser. (a) Pulse width; (b) repetition frequency