RF injection locking of THz metasurface quantum-cascade-VECSEL

Yu Wu; Christopher A. Curwen; John L. Reno; Benjamin S. Williams

doi:10.1117/12.2647914

17 March 2023 RF injection locking of THz metasurface quantum-cascade-VECSEL

Yu Wu, Christopher A. Curwen, John L. Reno, Benjamin S. Williams

Proceedings Volume PC12440, Novel In-Plane Semiconductor Lasers XXII; PC124400R (2023) https://doi.org/10.1117/12.2647914
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

RF injection locking of a terahertz Quantum-Cascade Vertical-External-Cavity Surface-Emitting Laser (QC-VECSEL) is demonstrated. The intra-cryostat focusing VECSEL cavity design allows continuous wave lasing in an external cavity length over 30 mm with a round-trip frequency near 5 GHz. Strong RF current modulation is applied to the QC-metasurface near the cavity round-trip frequency; this broadens the THz emission spectrum from a single mode to multi-mode operation around a 200 GHz spectral width. Round-trip frequency pulling and locking to the injected RF signal is observed.

Conference Presentation

Citation Download Citation

Yu Wu, Christopher A. Curwen, John L. Reno, and Benjamin S. Williams "RF injection locking of THz metasurface quantum-cascade-VECSEL", Proc. SPIE PC12440, Novel In-Plane Semiconductor Lasers XXII, PC124400R (17 March 2023); https://doi.org/10.1117/12.2647914

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