Fig. 1. The relationship between the theoretical simulation frequency difference and the loss anisotropy.

Fig. 2. Schematic diagram for the operation and measurement of the linear polarization regime of the continuous-wave Nd:YAG laser.

Fig. 3. Output power of the free-running state (a) without the Glan prism and (b) after the corresponding angle of the Glan prism.

Fig. 4. The frequency difference varies with the angle of the analyzer in the case of the free-running state. (a) The power spectrum under the analyzer of 10°, 20°, and 30°. (b) The relationship between the frequency difference intensity and the angle of the analyzer.

Fig. 5. Polarization output characteristics of the near linearly polarized laser (a) without the Glan prism and (b) after the corresponding angle of the Glan prism.

Fig. 6. The change of the frequency difference during the transition from the free-running state to the frequency locking state.

Fig. 7. The change of the polarization curve during the transition from the free-running state to the frequency locking state.

Fig. 8. The relationship between the degree of polarization and the frequency difference during the transition from the free-running state to the frequency locking state.

Fig. 9. The relationship between the linearly polarized laser realization and (a) the output transmittance and (b) the cavity length.

Fig. 10. Experimental test of two beam profile changes.

Fig. 11. Theoretical simulation of two beam profile changes.