Distributed cavity phase shifts & microwave photon recoils

Chad Fertig, Ruoxin Li, J. Irfon Rees, Kurt Gibble

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


We examine cylindrical TE011 microwave cavities and find large phase shifts of the microwave field near the edges of the cut-off waveguide apertures, where there are nodes in the field. The phase shifts lead to a potential distributed cavity phase shift for atomic clocks. Using an additional larger diameter cut-off waveguide section can effectively exclude the nodes and the large phase shifts from the atomic trajectories. It has been suggested that recoils from the absorption of microwave photons lead to frequency shift and also a loss of fringe contrast. We present measurements of the contrast for up to 2 19π/2 pulses and find no loss of contrast beyond that expected from measuring microwave field inhomogeneities with up to 19π Rabi pulses.

Original languageEnglish (US)
Pages (from-to)469-472
Number of pages4
JournalProceedings of the Annual IEEE International Frequency Control Symposium
StatePublished - Jan 1 2002
EventProceedings of the 2002 IEEE International Frequency Control Symposium and PDA Exhibition - New Orleans, LA, United States
Duration: May 29 2002May 31 2002

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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