Perfectly phase-matched third-order distributed feedback terahertz quantum-cascade lasers

Tsung-Yu Kao, Qing Hu, John L. Reno
We report a novel laser cavity design in third-order distributed feedback (DFB) terahertz quantum-cascade lasers based on a perfectly phase-matching technique. This approach substantially increases the usable length of the third-order DFB laser and leads to narrow beam patterns. Single frequency ... [Opt. Lett. 37, 2070-2072 (2012)]

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