Open AccessSteady-state stimulated Raman generation and filamentation using complex vector vortex beams
Author(s) -
Heinrich Meyer,
Sandra Mamani,
R. R. Alfano
Publication year - 2020
Publication title -
applied optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 197
eISSN - 2155-3165
pISSN - 1559-128X
DOI - 10.1364/ao.393973
Subject(s) - filamentation , physics , optics , nanosecond , polarization (electrochemistry) , raman scattering , vortex , raman spectroscopy , laser , atomic physics , chemistry , thermodynamics
Stimulated Raman scattering and laser filamentation produced using nanosecond pulsed complex vector vortex beams (CVVB) are investigated in a 20 cm long methanol cell. The CVVB is generated using q -plates and is tested at orbital angular momentum ( L ) values of 1, 2, 3, and 4 and circular, radial, and azimuthal polarizations. The results illustrate that the stability and intensity of the generated stimulated Raman has dependence on input polarization and L value. During filamentation, the beam is also shown to break up into multiple primary filaments and that there is a reduction in small-scale filamentation when using CVVBs.