Presentation
1 April 2022 Towards quantum-cascade VECSELs for terahertz heterodyne local oscillators
Author Affiliations +
Abstract
We report advances in the development of THz quantum-cascade metasurface VECSELs intended for use as local oscillators in terahertz heterodyne receiver instruments for astrophysical investigation of the interstellar medium. First, by using a patch-based amplifying metasurface we obtain QC-VECSEL lasing with milliwatt output power at 4.6 THz with reduced power consumption less than 1 W. Second, we report the phase locking of a QC-VECSEL at 3.4 THz to a microwave reference using a Schottky diode mixer. Finally, we report efforts and challenges to scale down the lasing frequency of the VECSELs to 1.9 THz.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christopher A. Curwen, Anthony D. Kim, Yu Wu, Yue Shen, Darren J. Hayton, Jonathan H. Kawamura, Boris S. Karasik, Sadhvikas Addamane, John L. Reno, and Benjamin S. Williams "Towards quantum-cascade VECSELs for terahertz heterodyne local oscillators", Proc. SPIE PC11984, Vertical External Cavity Surface Emitting Lasers (VECSELs) XI, PC1198402 (1 April 2022); https://doi.org/10.1117/12.2615672
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KEYWORDS
Terahertz radiation

Heterodyning

Oscillators

Antennas

Laser stabilization

Continuous wave operation

Diodes

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