Abstract
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 language | English |
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Pages (from-to) | 27-31 |
Number of pages | 5 |
Journal | Optics Communications |
Volume | 219 |
Issue number | 1-6 |
DOIs | |
State | Published - Apr 15 2003 |
Keywords
- Cesium spectroscopy
- Doppler velocimetry
- Resonance fluorescence monochromator