Title :
Observation of Raman-Ramsey fringes with optical CPT pulses
Author :
Zanon, Thomas ; Tremine, Stéphane ; Guerandel, Stephane ; De Clercq, Emeric ; Holleville, David ; Dimarcq, Noel ; Clairon, Andre
Author_Institution :
SYRTE, Obs. de Paris, France
fDate :
4/1/2005 12:00:00 AM
Abstract :
The Ramsey method has been applied by means of optical coherent population trapping (CPT) pulses through a cesium vapor cell with N2 buffer gas at room temperature, using two phase-locked lasers. With this method, CPT resonance spectral widths are no longer limited by optical saturation and collision effects, but only depend on free evolution time between the two pulses. A fringe width below 100 Hz is reported. Experimental Raman-Ramsey fringes are analyzed using the classical wavefunction formalism.
Keywords :
Raman lasers; caesium; light coherence; optical saturation; resonance; wave functions; CPT resonance spectral widths; Lamb-Dicke regime; N; Raman-Ramsey fringes; buffer gas; cesium vapor cell; collision effects; optical coherence; optical coherent population trapping pulses; optical saturation; phase locked lasers; wave function formalism; Frequency; Gas lasers; Laser excitation; Laser transitions; Optical buffering; Optical distortion; Optical pulses; Optical pumping; Optical saturation; Resonance; Coherent population trapping (CPT); Lamb–Dicke regime; Ramsey fringes; optical coherence;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2004.843400
