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Microwave free‐electron laser with an external additional back‐coupling circuit
Author(s) -
Ivanchenko Igor V.
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990105)20:1<21::aid-mop5>3.0.co;2-u
Subject(s) - microwave , resonator , coupling (piping) , laser , physics , optics , free electron laser , electrical engineering , engineering , acoustics , optoelectronics , telecommunications , mechanical engineering
The spatial amplitude–phase field distributions have been studied in the original electromagnetic structure serving as a waveguide analog of a two‐reflector open resonator, with the aid of a new method developed by the author. Such a resonator is used to provide an internal positive back coupling in the microwave oscillator. Analysis and experimental results are given for a microwave free‐electron laser (FEL), using the Smith–Purcell effect, with an external additional back‐coupling circuit. It has been shown that an external additional back‐coupling circuit can be used in this microwave oscillator design without any effect on the matching between the resonance contour and microwave load. This enables one to efficiently control the tube dynamic characteristics and to increase the dynamic system stability to the feeding circuit fluctuations. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 20: 21–26, 1999.