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Updated: Feb 13, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
High-power sub-terahertz source with a record frequency stability at up to 1 Hz
Andrey Fokin1, Mikhail Glyavin2, German Golubiatnikov2
1Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS), Nizhny Novgorod, 603950, Russia. ap.fokin@mail.ru.
Abstract:
Many state-of-the-art fundamental and industrial projects need the use of terahertz radiation with high power and small linewidth. Gyrotrons as radiation sources provide the desired level of power in the sub-THz and THz frequency range, but have substantial free-running frequency fluctuations of the order of 10-4. Here, we demonstrate that the precise frequency stability of a high-power sub-THz gyrotron can be achieved by a phase-lock loop in the anode voltage control. The relative width of the frequency spectrum and the frequency stability obtained for a 0.263 THz/100 W gyrotron are 4 × 10-12 and 10-10, respectively, and these parameters are better than those demonstrated so far with high-power sources by almost three orders of magnitude. This approach confirms its potential for ultra-high precision spectroscopy, the development of sources with large-scale radiating apertures, and other new projects.
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