Opt Lett. 2023 Jun 1;48(11):3071-3074. doi: 10.1364/OL.494220.
In this Letter, we present a highly efficient 1.55-µm buried heterostructure distributed feedback (BH-DFB) laser diode. The optimized epitaxial structure resulted in a threshold current of 12 mA and a differential slope efficiency of 0.433 W/A. The laser exhibited stable single longitudinal mode characteristics in both high current injection and broad temperature range testing. Additionally, the ns-level pulsed operation characteristics of the BH-DFB laser were verified, achieving a pulse peak power of 6.27 W with a pulse optical width of 20.4 ns. The watt-level pulse optical power was achieved with a single active region. With its eye-safe wavelength, high operating efficiency, stable single-mode spectral characteristics, and high pulse optical power, the 1.55-µm BH-DFB laser is a promising light source for LiDAR systems.
在这篇快报中，我们展示了一种高效的 1.55µm 掩埋异质结构分布反馈（BH-DFB）激光二极管。优化的外延结构使阈值电流达到 12mA，微分斜率效率达到 0.433W/A。在高电流注入和宽温度范围测试中，激光均表现出稳定的单纵模特性。此外，还验证了 BH-DFB 激光的纳秒级脉冲工作特性，实现了脉冲峰值功率为 6.27W、脉冲光宽为 20.4ns 的脉冲光输出。在单个有源区即可实现瓦级脉冲光功率。1.55µm BH-DFB 激光具有人眼安全波长、高工作效率、稳定的单模光谱特性和高脉冲光功率，是 LiDAR 系统有前途的光源。
