Compact green light sources for laser projection display

摘要

A compact diode-pumped microchip (DPM) green light source which consist of pump LD, Nd: YVO_4, KTP and a built-in thermoelectric element has been fabricated for laser projection display . The volume of the source is as small as 0.7 cm~3 and we obtained the output power of 25mW with the average electric power consumption in pump LD of 304mW which correspond to the electrical-to-optical efficiency of 7.8%. Another approach using quasi phase matching(QPM) technique has been attempted. We obtained the output power of 90mW of green beam with 350mW pumping of a Nd:YVO_4 laser with 20-kHz rep. rate and 10-ns pulse duration. Detailed characteristics and issues of the DPM and QPM green light sources will be addressed.