Simulation of a two-dimensional laser diode array directly cooled by coolant flow

We report an analysis of attained output powers of laser diode bars (LDBs) and power densities of two-dimensional laser diode arrays (LDAs). A new LDA design is proposed and its thermal regime is simulated. The cw output power of the proposed LDA consisting of standard cw LDBs (output power 100 W, efficiency 50%, cavity length 2 mm) can reach 5 kW cm^-2. The parameters of a coolant flow in the microchannels of the LDA heat sink necessary to achieve such powers are calculated.