Coherent Dark States of Rubidium 87 in a Buffer Gas using Pulsed Laser Light

Details Coherent Dark States of Rubidium 87 in a Buffer Gas using Pulsed Laser Light Coherent Dark States of Rubidium 87 in a Buffer Gas using Pulsed Laser Light

1998-03-27

arxiv.org/abs/quant-ph/9803081v2

Physics

Quantum Physics

3 pages, 5 figures, 1 misprint corrected

Scientific paper

10.1007/s100530050159

The coherent dark resonance between the hyperfine levels F=1, m=0 and F=2, m=0 of the rubidium ground state has been observed experimentally with the light of a pulsed mode-locked diode laser operating at the D1 transition frequency. The resonance occurs whenever the pulse repetition frequency matches an integer fraction of the rubidium 87 ground state hyperfine splitting of 6.8 GHz. Spectra have been taken by varying the pulse repetition frequency. Using cells with argon as a buffer gas a linewidth as narrow as 149 Hz was obtained. The rubidium ground state decoherence cross section 1.1*10^(-18) cm^2 for collisions with xenon atoms has been measured for the first time with this method using a pure isotope rubidium vapor cell and xenon as a buffer gas.

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