Zhao Shaoyu, Qi Aiyi, Wang Mingjin, Qu Hongwei, Lin Yuzhe, Dong Fengxin, Zheng Wanhua
Opt Express. 2018 Feb 5;26(3):3518-3526. doi: 10.1364/OE.26.003518.
High-power high-brightness super large optical cavity laser diodes with an optimized epitaxial structure are investigated at the wavelength of 980 nm range. The thicknesses of P- and N-waveguides are prudently chosen based on a systematic consideration about mode characteristics and vertical far-field divergences. Broad area laser diodes show a high internal quantum efficiency of 98% and a low internal optical loss of 0.58 cm. The ridge-waveguide laser with 7 μm ridge and 3 mm cavity yields 1.9 W single spatial mode output with far-field divergence angles of 6.8° in lateral and 11.5° in vertical at full width at half maximum under 2 A CW operating current. The corresponding M values are 1.77 and 1.47 for lateral and vertical, respectively, and the corresponding brightness is 76.8 MW‧cm‧sr. The far-field divergence angles with 95% power content are in the range of 24.7° to 26.1° across the whole measured range.
对具有优化外延结构的高功率高亮度超大光腔激光二极管在980nm波长范围进行了研究。基于对模式特性和垂直远场发散的系统考虑，谨慎选择了P波导和N波导的厚度。宽面激光二极管显示出98%的高内量子效率和0.58cm的低内部光损耗。具有7μm脊宽和3mm腔长的脊波导激光器在2A连续工作电流下，半高全宽处横向远场发散角为6.8°，纵向为11.5°，单空间模式输出功率为1.9W。横向和纵向的相应M值分别为1.77和1.47，相应亮度为76.8MW‧cm‧sr。在整个测量范围内，含95%功率的远场发散角在24.7°至26.1°范围内。
