Different influences of u-InGaN upper waveguide on the performance of GaN-based blue and green laser diodes
Liang Feng1, 2, Zhao De-Gang1, 3, †, Jiang De-Sheng1, Liu Zong-Shun1, Zhu Jian-Jun1, Chen Ping1, Yang Jing1, Liu Wei1, Li Xiang1, Liu Shuang-Tao1, Xing Yao1, Zhang Li-Qun4, Li Mo5, Zhang Jian5
       

(color online) Variations of (a) optical field distribution with vertical position and (b) output power with current curve for LD2 and LD2-5. Ith and OP are the threshold current and output power under an injecting current of 120 mA, respectively.