High power compact blue laser module for projection display

The blue laser module, based on 8 single-emitter blue COSs (chip on sub-mount) with the power of 5W, introduced in this paper outputs totally 40W laser with the size of only 26*15.8*5.8mm, which is the ideal light source to improve the brightness of the projection display system. Utilizing the advanced thermal management capability and high-level hermetically sealing packaging technology, this module solves the key bottlenecks of good electrical-to-optical efficiencies, small sizes, high operating temperatures and long-term operation of blue laser diodes. The module has the electro-optical conversion efficiency more than 37%, the thermal resistance less than 7.5 ℃ / W, the leakage rate less than 5×10-8atm*cc/s, and the power degradation after 5000h lifetime less than 10%.