Long-Term Reliability of 915-nm Broad-Area Laser Diodes under 20 W CW Operation

We report on the long-term reliable CW operation of high-power and high-efficiency 915-nm broad-area laser diodes (BA-LDs). An output power of over 20 W and a maximum power-conversion efficiency of over 65% have been marked at a heat-sink temperature of 20 ºC. Stable operations of over 5000 h have also been achieved for the 915-nm and 976-nm BA-LDs with CW output powers of 20 W, respectively. The window structure with a band gap difference of 100 meV provides the reliable operation at the high-output power range.