High-power high beam-quality tapered semiconductor laser BARs

For improving the beam quality, the ridge-waveguide structure is introduced to ensure the output in single mode of the laser BAR. In addition, the single mode wave is amplified in power by the tapered amplification. Then the high powerful light output in ten class watts is realized while it has the property of high beam quality. The isolative groove of the shape X is used to restrict the light feedback around the ridge and tapered section. According to theoretical analysis, the measuring devices are designed for measuring the beam quality of the tapered laser. And calculating the numerical value of the beam quality of the tapered laser BARs. The max output powers is 37.52W, the slope efficiency is 0.653W/A, the beam quality parameter M² maintain 210 around.