ISSN:
1432-0649
Keywords:
33.80
;
42.65
;
42.72
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract An intense radiation at 395.0 nm has been observed when lithium vapor is optically pumped in a heat pipe with a pulsed dye laser whose output wavelength is tuned near the Li 2s–4s two-photon resonance transition. The radiation is emitted in the direction along the pump laser beam. It is proposed that the 395.0 nm radiation is mainly generated through three-photon excitation and one-Raman-photon scattering followed by two-cascade (spontaneous) emission. The overall reaction mechanism can be described by a parametric six-wave mixing process. The quantum efficiency of the observed process is estimated to be of the order of 2 × 10−6.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00325249
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