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| (a) Photograph of a fully assembled 2D VCSEL array on a diamond submount and micro-channel-cooler for CW testing. The VCSEL chip size is approximately 5 × 5 mm. (b) Continuous-wave output power and voltage of a 2D VCSEL array assembled on a micro-channel-cooler. The VCSEL chip is maintained at a constant heat-sink temperature of 15 °C. A maximum power of 231 W at 320 A is reached, limited by thermal roll-over. This power level corresponds to a power density of 1 kW/cm2 for this array. Credit: Princeton Optronics. |
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