Multi-mode lasing in metasurface QC-VECSELs under RF current modulation

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

doi:10.1117/12.3003375

13 March 2024 Multi-mode lasing in metasurface QC-VECSELs under RF current modulation

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

Proceedings Volume PC12905, Novel In-Plane Semiconductor Lasers XXIII; PC129050L (2024) https://doi.org/10.1117/12.3003375
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

RF modulation of the injected current at the cavity round trip frequency is a viable path towards multi-mode operation in a THz metasurface quantum-cascade VECSEL. Under weak RF modulation, pulling and locking of the round-trip frequency to the injected RF signal is observed; under strong RF modulation, broadening of the lasing spectrum with a maximum observable bandwidth as large as 300 GHz is demonstrated. It is shown that the injection locking behavior is sensitive to the cavity length (varied between 35-50 mm), as well as the presence of optical feedback. Long-travel FTIR measurements enable resolution of the lasing modes.

Conference Presentation

Citation Download Citation

Yu Wu, John L. Reno, Christopher A. Curwen, and Benjamin S. Williams "Multi-mode lasing in metasurface QC-VECSELs under RF current modulation", Proc. SPIE PC12905, Novel In-Plane Semiconductor Lasers XXIII, PC129050L (13 March 2024); https://doi.org/10.1117/12.3003375

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