Giant Coulomb broadening and Raman lasing on ionic transitions

Details Giant Coulomb broadening and Raman lasing on ionic transitions Giant Coulomb broadening and Raman lasing on ionic transitions

1996-03-22

arxiv.org/abs/atom-ph/9603006v1

Physics

Atomic Physics

RevTex 18 pages, 5 figures

Scientific paper

CW generation of anti-Stokes Raman laser on a number of blue-green argon-ion lines (4p-4s, 4p-3d) has been demonstrated with optical pumping from metastable levels 3d'^2G, 3d^4F. It is found, that the population transfer rate is increased by a factor of 3-5 (and hence, the output power of such Raman laser) owing to Coulomb diffusion in the velocity space. Measured are the excitation and relaxation rates for the metastable level. The Bennett hole on the metastable level has been recorded using the probe field technique. It has been shown that the Coulomb diffusion changes shape of the contour to exponential cusp profile while its width becomes 100 times the Lorentzian one and reaches values close to the Doppler width. Such a giant broadening is also confirmed by the shape of the absorption saturation curve.

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