GIANT COULOMB BROADENING AND RAMAN LASING IN IONIC TRANSITIONS

Citation
Aa. Apolonsky et al., GIANT COULOMB BROADENING AND RAMAN LASING IN IONIC TRANSITIONS, Physical review. A, 55(1), 1997, pp. 661-667
Citations number
16
Categorie Soggetti
Physics
Journal title
ISSN journal
10502947
Volume
55
Issue
1
Year of publication
1997
Pages
661 - 667
Database
ISI
SICI code
1050-2947(1997)55:1<661:GCBARL>2.0.ZU;2-Y
Abstract
Continuous-wave generation of an anti-Stokes Raman laser on a number o f blue-green argon-ion lines (4p-4s and 4p-3d) has been demonstrated w ith optical pumping from metastable levels 3d'(2)G and 3d(4)F. It is f ound that the population transfer rate is increased by a factor of 3-5 (and hence the output power of the Raman laser) owing to Coulomb diff usion in the velocity space. The excitation and relaxation rates for t he metastable level have been measured. The Bennett hole on the metast able level has been recorded using the probe field technique. It has b een shown that Coulomb diffusion changes the shape of the contour to a n exponential cusplike profile. Its width exceeds the Lorentzian one b y 100 times and is close to the Doppler width. Such a giant broadening is also confirmed by the shape of the absorption saturation curve.