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Phase-Locked Arrays of Surface-Emitting Terahertz Quantum-Cascade Lasers

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Abstract

We report single-mode operation of phase-locked arrays of surface-emitting distributed-feedback terahertz quantum-cascade lasers. Carefully-designed phase-sector locks lasers in-phase, creating tighter beam-patterns along the phased-array direction (FWHM ≈ 10°). This method allows beam-steering applications at terahertz frequencies.

© 2010 Optical Society of America

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