Phase-locked pair of terahertz quantum cascade lasers through evanescent-wave coupling
Infrared Physics & Technology（2020）
Abstract
•A phase-locked lasers pair containing two THz-DFB-QCLs has been realized.•An amplification factor of about 1.72 has been achieved.•The far-field results point out an approach for electrical beam steering.
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Key words
Terahertz,Quantum cascade laser,Distributed feedback,Phase-locked coupling,Evanescent-wave coupling
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