论文信息 - Comparison of 87Rb N-resonances for D1 and D2 transitions.

Comparison of 87Rb N-resonances for D1 and D2 transitions.

We report an experimental comparison of three-photon-absorption resonances (N-resonances) for the D1 and D2 optical transitions of thermal (87)Rb vapor. We find that the D2 N-resonance has better contrast, a broader linewidth, and a more symmetric line shape than the D1 N-resonance. Taken together, these factors imply superior performance for frequency standards operating on alkali D2 N-resonances, in contrast with coherent population trapping resonances, for which the D2 transition provides poorer frequency standard performance than the D1 transition.

[1] J. Kitching,et al. A chip-scale atomic clock based on 87Rb with improved frequency stability. , 2005, Optics express.

[2] Irina Novikova,et al. Cancellation of light shifts in an N-resonance clock. , 2006, Optics letters.

[3] J. Vanier. Atomic clocks based on coherent population trapping: a review , 2005 .

[4] A. Zibrov,et al. Three-photon-absorption resonance for all-optical atomic clocks , 2005, physics/0501090.

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

[6] I. Novikova,et al. Modulation-induced frequency shifts in a coherent-population-trapping-based atomic clock , 2004, physics/0404076.

[7] Svenja Knappe,et al. Chip-scale atomic magnetometer , 2004 .

[8] R. Wynands,et al. Theory of dark resonances for alkali-metal vapors in a buffer-gas cell , 2003 .

[9] Andrey B. Matsko,et al. Observation of a three-photon electromagnetically induced transparency in hot atomic vapor , 2002 .

[10] R Wynands,et al. Coherent population trapping resonances in thermal (85)Rb vapor: D(1) versus D(2) line excitation. , 2002, Optics letters.

[11] Magnetometer based on the opto-electronic microwave oscillator , 2005 .