Fig. 1. Schematic of direct-liquid-cooling side-pumped Nd:YAG multi-disk laser resonator

Fig. 2. Performance of interface loss. (a) Variation in interface loss with offset angle; (b) variation in Brewster angle with temperature rise

Fig. 3. Structure schematic of single cooling channel

Fig. 4. Velocity profiles of the cross sections of the channel at different distances from the inlet. (a) Inlet; (b) d=7 mm; (c) d=15 mm; (d) d=25 mm; (e) d=40 mm; (f) d=60 mm; (g) d=90 mm; (h) d=120 mm

Fig. 5. Normalized standard deviation of velocity distributions in the center line of cross sections of the channel at different distances from the inlet

Fig. 6. Simulation model and the comparison with the experimental results. (a) Simulation model; (b) temperature distribution of the surface of the resistor; (c) comparison of the experimental and simulation results

Fig. 7. Average temperature rise of the thin-film resistor' surface versus flow velocity

Fig. 8. Convective heat transfer coefficient versus flow velocity at different channel thickness

Fig. 9. Pumping densitydistribution (peak) and normalized gain distribution of the GM. (a) Side surface of the GM; (b) the plane 5 mm away from the side surface in the GM; (c) normalized gain distribution in the laser aperture in parallel with end surfaces of thin disks

Fig. 10. Results of thermal calculation. (a) Temperature distribution; (b) stress distribution

Fig. 11. Profile of the output laser beam

Fig. 12. Output characteristic of the laser resonator. (a) Pulse energy versus the transmittance of OC; (b) output characteristic versus pump repetition frequency

Fig. 13. Waveforms of output laser pulse