A general equation for the interaction of atoms with many separated traveling waves is introduced, and the oscillating terms corresponding to the Ramsey fringes are found in the equation. The features of the multizone Ramsey resonance are quite comprehensible with the aid of the diagrammatic representation of the atomic beam and laser fields. The resonance condition and the narrowing effect of the fringe width are discussed. Using the intercombination line of a Ca atom, the multizone Ramsey resonances of up to ten separated fields were demonstrated. With the ten separated fields, the Ramsey fringes with a contrast of 130% to the saturation dip could be obtained at a relatively small excitation power.A general equation for the interaction of atoms with many separated traveling waves is introduced, and the oscillating terms corresponding to the Ramsey fringes are found in the equation. The features of the multizone Ramsey resonance are quite comprehensible with the aid of the diagrammatic representation of the atomic beam and laser fields. The resonance condition and the narrowing effect of the fringe width are discussed. Using the intercombination line of a Ca atom, the multizone Ramsey resonances of up to ten separated fields were demonstrated. With the ten separated fields, the Ramsey fringes with a contrast of 130% to the saturation dip could be obtained at a relatively small excitation power.

Physical Review AJun 1, 19928 citations

Non-linear ramsey resonance in the optical region

Ye. V. Baklanov, B. Dubetsky, Veniamin P. Chebotayev

Applied Physics AFeb 1, 1976165 citations

THE LINE SHAPE OF OPTICAL RAMSEY RESONANCES

D. D. Krylova

Symposium on Frequency Standards and MetrologyMay 1, 20020 citations

Raman-Ramsey multizone spectroscopy in a pure rubidium vapor cell

H. Failache, L. Lenci, A. Lezama

In view of application to a miniaturized spectroscopy system, we consider an optical setup that splits a laser beam into several parallel narrow light sheets allowing an effective beam expansion and consequently longer atom-light interaction times. We analyze the multizone coherent population trapping (MZCPT) spectroscopy of alkali-metal-vapor atoms, without buffer gas, in the presence of a split light beam. We show that the MZCPT signal is largely insensitive to intensity broadening. Experimentally observed spectra are in qualitative agreement with the predictions of a simplified model that describes each spectrum as an integral over the atomic velocity distribution of Ramsey multizone spectra.In view of application to a miniaturized spectroscopy system, we consider an optical setup that splits a laser beam into several parallel narrow light sheets allowing an effective beam expansion and consequently longer atom-light interaction times. We analyze the multizone coherent population trapping (MZCPT) spectroscopy of alkali-metal-vapor atoms, without buffer gas, in the presence of a split light beam. We show that the MZCPT signal is largely insensitive to intensity broadening. Experimentally observed spectra are in qualitative agreement with the predictions of a simplified model that describes each spectrum as an integral over the atomic velocity distribution of Ramsey multizone spectra.

Physical Review AFeb 3, 20107 citations

Optical Ramsey fringes with traveling waves

Ch. J. Bordé, Ch Salomon, S. Avrillier +4 more

We present a new interaction geometry for optical Ramsey fringes comprised of four traveling waves instead of the three usual standing waves. First, we demonstrate experimentally that the new method leads to an improved contrast, using the optothermal detection of the vibrational excitation of ${\mathrm{SF}}_{6}$ in a supersonic beam illuminated by a waveguide ${\mathrm{CO}}_{2}$ laser. Second, we give a simple theoretical description of the method, using evolution matrices of spinors and pseudospin-vector representations of these spinors. Finally, we introduce strong-field density-matrix diagrams to discuss the differences between the various interaction geometries as well as between the Ramsey fringes and the usual stimulated photon echoes.We present a new interaction geometry for optical Ramsey fringes comprised of four traveling waves instead of the three usual standing waves. First, we demonstrate experimentally that the new method leads to an improved contrast, using the optothermal detection of the vibrational excitation of ${\mathrm{SF}}_{6}$ in a supersonic beam illuminated by a waveguide ${\mathrm{CO}}_{2}$ laser. Second, we give a simple theoretical description of the method, using evolution matrices of spinors and pseudospin-vector representations of these spinors. Finally, we introduce strong-field density-matrix diagrams to discuss the differences between the various interaction geometries as well as between the Ramsey fringes and the usual stimulated photon echoes.

Physical Review AOct 1, 1984223 citations

The line shape of linear optical Ramsey resonance

D. D. Krylova

Optics CommunicationsOct 21, 20021 citation

{\mathrm{SF}}_{6}

in a supersonic beam illuminated by a waveguide

{\mathrm{CO}}_{2}

laser. Second, we give a simple theoretical description of the method, using evolution matrices of spinors and pseudospin-vector representations of these spinors. Finally, we introduce strong-field density-matrix diagrams to discuss the differences between the various interaction geometries as well as between the Ramsey fringes and the usual stimulated photon echoes.