Fig. 1. Structure of expanding fiber connector

Fig. 2. Beam coupling diagram

Fig. 3. Structure diagram of edge water cooling

Fig. 4. Air cooling structure of planar heat dissipation

Fig. 5. Air cooling structure of side heat dissipation

Fig. 6. Maximum temperature of lens surface varies with lens thickness

Fig. 7. Simulation results of lens surface temperature under different cooling modes when thickness changes. (a)(c)(e) Lens edge thickness is 5 mm; (b)(d)(f) lens edge thickness is 25 mm

Fig. 8. Maximum temperature of lens surface varies with lens diameter

Fig. 9. Maximum temperature of lens surface varies with wind speed

Fig. 10. Simulation results of temperature distribution on lens surface when wind speed changes. (a)(c)Wind speed is 1 m/s; (b)(d) wind speed is 19 m/s

Fig. 11. Maximum temperature of lens surface varies with temperature

Fig. 12. Aspheric pressure distribution of side air-cooled lens

Fig. 13. Planar pressure distribution of planar air-cooled lens

Fig. 14. Experimental schematic

Fig. 15. Surface temperature diagram of fused quartz glass. (a) Power is 10 W;(b) power is 70 W

Fig. 16. Comparison of experimental and simulated data