Wu Yu, Shen Yue, Addamane Sadhvikas, Reno John L, Williams Benjamin S
Opt Express. 2021 Oct 11;29(21):34695-34706. doi: 10.1364/OE.438636.
We report a terahertz quantum-cascade vertical-external-cavity surface-emitting laser (QC-VECSEL) emitting around 1.9 THz with up to 10% continuous fractional frequency tuning of a single laser mode. The device shows lasing operation in pulsed mode up to 102 K in a high-quality beam, with the maximum output power of 37 mW and slope efficiency of 295 mW/A at 77 K. Challenges for up-scaling the operating wavelength in QC metasurface VECSELs are identified.
我们报道了一种太赫兹量子级联垂直外腔面发射激光器（QC-VECSEL），其发射频率约为1.9太赫兹，单激光模式的连续分数频率调谐高达10%。该器件在高达102 K的温度下以脉冲模式运行，输出高质量光束，在77 K时的最大输出功率为37 mW，斜率效率为295 mW/A。我们还确定了在QC超表面VECSEL中扩大工作波长所面临的挑战。
