Stimulated Raman scattering of a 532 nm pulsed Nd:YAG laser in multi-mode optical fiber

Abstract

We report stimulated Raman scattering (SRS) in a multimode graded-index optical fiber for both upward and downward frequency conversion of the second harmonic (532 nm) of a Nd:YAG laser. Generated SRS shows three orders of anti-Stokes emission lines at 484.6 nm, 498.2 nm, and 513.7 nm. Six orders of Stokes lines corresponding to SI, S2, S3, S4, S5, and S6 were observed at 544.5 nm, 553.2 nm, 569.2 nm, 584.4 nm, 600.4 nm and 630.7 nm, respectively. The temporal evolution of the SRS lines with respect to the input pump at 532 nm is presented.