Fig. 1. CO₂ laser with high peak power

Fig. 2. Temperature control structure of CO₂ laser

Fig. 3. Finite element model of CO₂ laser

Fig. 4. Heat-dissipating structure model

Fig. 5. Temperature distributions of convection heat transfer region formed by fans at different rotate speeds when the cooling fin spacing is 5 mm

Fig. 6. Temperature distributions of convection heat transfer region formed by fans at different rotate speeds when the cooling fin spacing is 3 mm

Fig. 7. Temperature distribution of laser based on temperature control cooling in high temperature environment

Fig. 8. Temperature of the monitoring point on the laser surface changing with time in high temperature environment

Fig. 9. Temperature distribution of laser based on temperature control heating in low temperature environment

Fig. 10. Temperature of the monitoring point on the laser surface changing with time in low temperature environment

Fig. 11. High and low temperature experimental setup for CO₂ laser

Fig. 12. Comparison of the measured temperature and the simulation data in high temperature environment

Fig. 13. Comparison of the measured temperature and the simulation data in the low temperature environment