Fig. 1. Type I noncolinear SPDC

Fig. 2. The output angle theoretical value

Fig. 3. Crystal clamping system

Fig. 4. Dynamic thermal analysis

Fig. 5. Experimental optical path diagram

Fig. 6. Optical path diagrams of the photon rate

Fig. 7. The ring image processing

Fig. 8. Temperature effect on the radius of the ring

Fig. 9. The effect of temperature on the output angle

Fig. 10. Relationship between the photon rate and temperature in Crylas Laser, Germany

Fig. 11. Relationship between the photon rate and temperature in Shanghai Laser