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Title: Influence of the electron spin resonance saturation on the power sensitivity of cryogenic sapphire resonators

Here, we study the paramagnetic ions behavior in presence of a strong microwave electromagnetic field sustained inside a cryogenic sapphire whispering gallery mode resonator. The high frequency measurement resolution that can be now achieved by comparing two Cryogenic Sapphire Oscillators (CSOs) permit to observe clearly the non-linearity of the resonator power sensitivity. These observations that, in turn, allow us to optimize the CSO operation are well explained by the electron spin resonance saturation of the paramagnetic impurities contained in the sapphire crystal.
Authors:
; ; ; ;  [1]
  1. FEMTO-ST Institute—UMR 6174, CNRS/ENSMM/UFC/UTBM, 26 Chemin de l'Épitaphe, 25000 Besançon (France)
Publication Date:
OSTI Identifier:
22314573
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; CRYSTALS; ELECTROMAGNETIC FIELDS; ELECTRON SPIN RESONANCE; FREQUENCY MEASUREMENT; IMPURITIES; IONS; MICROWAVE RADIATION; OSCILLATORS; PARAMAGNETISM; RESOLUTION; RESONATORS; SAPPHIRE; SATURATION; SENSITIVITY