Fig. 1. (a) Immersed liquid cooling Nd:YAG slab laser oscillator, (b) the GM, and (c) the GM’s internal structure.

Fig. 2. Emission beam from the LD stack. (a) At the exit plane by one of the stacks, (b) using a waveguide with the uniformity of 92%, and (c) without using a waveguide with the uniformity of just 70%.

Fig. 3. (a) Setup to measure the flowing state, (b) the setup to measure the temperature distribution, and (c) the temperature distribution measured on the resistor’s surface.

Fig. 4. Experimental results of velocity distributions for the Reynolds numbers of 1946 (u = 2 m/s), 2919 (u = 3 m/s), 3892 (u = 4 m/s), and 4865 (u = 5 m/s) in the laser slab zone.

Fig. 5. Thin-film resistor’s surface temperature is measured at a flow velocity of (a) 2 m/s, (b) 3 m/s, and (c) 4 m/s.

Fig. 6. Temperature changes on the resistor’s surface during the first 120 s.

Fig. 7. (a) Output power versus the pump power and (b) the output powers at various flow velocities.