Stimulated Raman gas sensing by backward UV lasing from a femtosecond filament.


We perform a proof-of-principle demonstration of chemically specific standoff gas sensing, in which a coherent stimulated Raman signal is detected in the direction anticollinear to a two-color laser excitation beam traversing the target volume. The proposed geometry is intrinsically free space as it does not involve back-scattering (reflection) of the… (More)
DOI: 10.1364/OL.40.002469


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