A high-resolution Ramsey-Bordé spectrometer for optical clocks based on cold Mg atoms
Institute for Quantum Optics, University of Hannover, Welfengarten 1, 30167 Hannover, Germany
Corresponding author: a email@example.com
Revised: 1 August 2005
Published online: 17 November 2005
We report on recent progress in our Ramsey-Bordé interferometer with cold magnesium atoms at 457.2 nm. A resolution as high as was achieved, which corresponds to a quality factor of . An upper limit of 170 Hz for the laser oscillator line width is inferred from the interferometric analysis of the contrast decay induced by the residual atomic motion and spontaneous emission. The performance of the spectrometer allows to realize an optical frequency standard at 457.2 nm with a short-term stability of up to with 105 atoms similar to state-of-the art, non-cryogenic microwave clocks or oscillators.
PACS: 06.30.Ft – time and frequency / 39.20.+q – atom interferometry techniques / 39.25.+k – Atom manipulation (scanning probe microscopy, laser cooling, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005