Fig. 1. Side-faces even pumping and cooling schematic for slab amplifer

Fig. 2. Schematic diagrams of cooling configuration. (a) Cavity forced convection; (b) Conduction through micro-channel heat sink; (c) Longitudinal forced convection

Fig. 3. Temperature contour on the x-z center cross section of laser slab. (a) Cavity forced convective configuration; (b) Micro-channel conductive configuration; (c) Longitudinal forced convective configuration

Fig. 4. Different parameters of longitudinal forced convective configuration vs the inlet flow rate, insert figure is temperature variance varying with the inlet flow rate

Fig. 5. Relationships of the different parameter differences vs inlet flow about fully developed and developing flow

Fig. 6. Simulation result of convective heat transfer coefficient vs x axis at the slab surface

Fig. 7. Effection of the surface roughness on performance of cooling system

Fig. 8. Crystal end faces temperature in investigation with laser amplifier working in longitudinal forced convection- infrared thermal imager (up) and simulation results (down)