Opt Lett. 2018 Jul 1;43(13):3025-3028. doi: 10.1364/OL.43.003025.
We report an ultra-wide tunable single- and double-mode InAs/InP quantum dot (QD) external-cavity (EC) laser in a Littrow configuration. By combining the high modal gain of the QD material in the long wavelength range and an anti-reflection/high-reflection facet coating, the entire single-mode tuning range was increased up to 190 nm under a relatively low constant pulsed injection current. Furthermore, the tunable range was further increased to 230 nm at different bias currents. In addition, a mode spacing as wide as 100 nm was achieved using the same QD-EC device in the dual-mode operation, corresponding to a frequency difference of approximately 11 THz.
我们报告了一种基于里特罗配置的超宽可调谐单模和双模 InAs/InP 量子点 (QD) 外腔 (EC) 激光器。通过结合 QD 材料在长波长范围内的高模式增益和抗反射/高反射面涂层，在相对较低的恒定脉冲注入电流下，整个单模调谐范围增加了 190nm。此外，在不同的偏置电流下，可调谐范围进一步增加到 230nm。此外，在双模式操作中，使用相同的 QD-EC 器件实现了高达 100nm 的模式间隔，对应于大约 11THz 的频率差。
