Moving object detection using a cesium resonance fluorescence monochromator

N. C. Pixley, T. L. Correll, D. Pappas, N. Omenetto, B. W. Smith, J. D. Winefordner

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The measurement of Doppler-shifted radiation using a cesium resonance fluorescence monochromator (RFM) is described. The RFM is based on two-step excitation (62S1/2→62P03/2 →62D5/2) followed by wavelength-shifted fluorescence and detection of resonance photons with sub-Doppler spectral resolution (200 MHz). We demonstrate the resolution of velocity differences by comparing excitation profiles of a reference beam and Doppler-shifted scatter. A rotating disc of variable speed was used to generate the Doppler-shifted photons. Velocity changes on the order of 25 m/s were resolved, and the upper velocity limit (1500 m/s) is limited only by the extent of the frequency scan of the first excitation laser.

Original languageEnglish
Pages (from-to)27-31
Number of pages5
JournalOptics Communications
Issue number1-6
StatePublished - Apr 15 2003


  • Cesium spectroscopy
  • Doppler velocimetry
  • Resonance fluorescence monochromator


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