论文信息 - Observation of Raman-Ramsey fringes with optical CPT pulses

Observation of Raman-Ramsey fringes with optical CPT pulses

The Ramsey method has been applied by means of optical coherent population trapping (CPT) pulses through a cesium vapor cell with N/sub 2/ 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.

[1] G. Orriols. Nonabsorption resonances by nonlinear coherent effects in a three-level system , 1979 .

[2] Dieter Meschede,et al. Buffer-gas-induced linewidth reduction of coherent dark resonances to below 50 Hz , 1997 .

[3] Chu,et al. Theoretical analysis of velocity-selective Raman transitions. , 1992, Physical review. A, Atomic, molecular, and optical physics.

[4] S. Ezekiel,et al. Precision studies of stimulated-resonance Raman interactions in an atomic beam , 1986 .

[5] Shaoul Ezekiel,et al. Observation of Ramsey Fringes Using a Stimulated, Resonance Raman Transition in a Sodium Atomic Beam , 1982 .

[6] Filippo Levi,et al. Coherent population trapping in cesium: Dark lines and coherent microwave emission , 1998 .

[7] M. S. Shahriar,et al. Dark-state-based three-element vector model for the stimulated Raman interaction , 1997 .

[8] S Ezekiel,et al. Ultrahigh-resolution spectroscopy and frequency standards in the microwave and far-infrared regions using optical lasers. , 1981, Optics letters.

[9] Ilkka Tittonen,et al. All-optical atomic clock based on coherent population trapping in 85 Rb , 2003 .