Vijayakumar Deepak, Jensen Ole B, Thestrup Birgitte
DTU Fotonik, Department of Photonics Engineering Technical University of Denmark, Roskilde, Denmark.
Opt Express. 2009 Mar 30;17(7):5684-90. doi: 10.1364/oe.17.005684.
We demonstrate off-axis spectral beam combining applied to a 980 nm high power broad area diode laser bar. The experiments yielded 9 W of optical power at 30 A of operating current and the measured M2 values of the combined beam from 12 emitters were 1.9 and 6.4 for the fast and the slow axis, respectively. The slow axis beam quality was 5-6 times better than the value obtained from a single emitter in free running mode. A high brightness of 79 MW/cm2-str was achieved using this configuration. To our knowledge, this is the highest brightness level ever achieved from a broad area diode laser bar.
我们展示了应用于980 nm高功率宽面二极管激光棒的离轴光谱光束合成。实验在30 A工作电流下产生了9 W的光功率，来自12个发射器的合成光束在快轴和慢轴方向上测得的M²值分别为1.9和6.4。慢轴方向的光束质量比自由运行模式下单发射器获得的值好5 - 6倍。使用这种配置实现了79 MW/cm²·sr的高亮度。据我们所知，这是宽面二极管激光棒所达到的最高亮度水平。
