A vortex Raman laser pumped by the second-order optical vortex mode was demonstrated. The first- and the second- Stokes waves that lased at the first-order optical vortex mode were generated. Considering the spatial intensity overlap between the pump and the first-Stokes beam, and between the first- and second-Stokes beams, the generation of a topological charge of 1 in the Stokes fields could be theoretically predicted.
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