Enhancement of Raman scattering by parametric mixing of the pump with its harmonic

Year: 2012

Authors: Marchetti S., Gabbanini C.

Autors Affiliation: Istituto Nazionele di Ottica, INO-CNR, U.o.S. Pisa, “Adriano Gozzini”, Via G.Moruzzi 1, 56124 Pisa, Italy

Abstract: A strong focusing of the pump laser is generally used to reduce the Stimulated Raman Scattering (SRS) threshold, but it also produces a phase matching condition in the region of strong gain. This causes a large threshold for SRS in the near infrared due both to the increased diffraction limit and to the destructive interaction of antiStokes-Stokes processes. However the phase matching condition can be used to reduce the threshold by Raman parametric mixing (RPM) of the pump with the second harmonic generated by a fraction of pump. It this way we have observed a lowering of the threshold of about a factor 2.3 and an increase of the SRS of the pump.

Journal/Review: OPTICS COMMUNICATIONS

Volume: 285 (15)      Pages from: 3312  to: 3315

KeyWords: Parametric mixing; Raman scattering
DOI: 10.1016/j.optcom.2012.03.017

Citations: 5
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