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Optics Communications

Observation of broadband forward hyper-Raman emission with high intensity focused laser beams

L. Deng, W. R. Garrett, M. G. Payne, D.Z. Lee

Published Oct 1, 1997• 4 citations
Publisher
DOI
10.1016/s0030-4018(97)00316-7

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The stimulated hyper-Raman scattering (SHRS) emissions associated with the excitation of the 4P 3/2 state in sodium vapour have been observed in both the forward and backward directions as the pumping laser was tuned near the 3S-4D two-photon resonance. The results show that though the forward SHRS process is greatly reduced by a destructive interference between it and the four-wave mixing (FWM) process induced by itself, the forward SHRS emission has a positive gain and can still be observed under a certain condition.