Rotational Raman scattering dependence on pump polarization

The influence of the ellipticity degree of the pump radiation polarization on threshold energies and energy conversion efficiencies of stimulated rotational Raman scattering (SRRS) are investigated in H2 with a XeCl excimer laser, by using different focusing geometries. For the first time, it is sho...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2000-04, Vol.70 (4), p.529-536
Main Authors: Diso, D., Perrone, M.R., Protopapa, M.L.
Format: Article
Language:English
Subjects:
Energy conversion efficiency
Focusing
Gain
Polarization
Pumps
Raman scattering
Rotational
Thresholds
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Summary:The influence of the ellipticity degree of the pump radiation polarization on threshold energies and energy conversion efficiencies of stimulated rotational Raman scattering (SRRS) are investigated in H2 with a XeCl excimer laser, by using different focusing geometries. For the first time, it is shown that the dependence of SRRS on pump radiation polarization is also affected by the focusing geometry, i.e. whether low- or high-angle focusing is applied. The experimentally determined threshold energies as a function of the pump radiation polarization are in accordance with theory mainly at high-angle focusing geometries. It is also shown for the first time that gain suppression effects on vibrational Raman scattering have to be considered in understanding the experimental results.
ISSN:0946-2171
1432-0649
DOI:10.1007/s003400050857