Single longitudinal mode continuous-wave operation of GaN-based distributed Bragg reflector (DBR) laser diodes with 10th-order surface gratings is demonstrated. The DBR consists of periodic V-shaped grooves on a 2 μm wide ridge waveguide fabricated by using electron-beam lithography and plasma etching. The effect of different lengths of the DBR section and the gain section on the device performance has been studied. Periodic mode hops to the adjacent longitudinal Fabry–Perot resonator mode at shorter wavelength have been observed when increasing the operation current. Between the mode hops, single longitudinal mode emission at around 405 nm is achieved with a full width at half-maximum of 0.03 nm. A linear redshift of the emission wavelength with increasing temperature of 0.019 nm/K was derived.

中文翻译：

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使用 10 阶表面光栅的基于 GaN 的 405 nm 分布式布拉格反射器激光二极管的连续波操作

演示了具有 10 阶表面光栅的基于 GaN 的分布式布拉格反射器 (DBR) 激光二极管的单纵模连续波操作。DBR 由使用电子束光刻和等离子体蚀刻制造的 2 μm 宽脊形波导上的周期性 V 形凹槽组成。研究了不同长度的DBR段和增益段对器件性能的影响。当增加工作电流时，已经观察到在较短波长处周期性模式跳跃到相邻的纵向法布里-珀罗谐振腔模式。在模式跳跃之间，实现了大约 405 nm 的单纵模发射，半高全宽为 0.03 nm。导出了发射波长随温度升高 0.019 nm/K 的线性红移。