Topological charge algebra of optical vortices in nonlinear interactions. Academic Article uri icon


  • We investigate the transfer of orbital angular momentum among multiple beams involved in a coherent Raman interaction. We use a liquid crystal light modulator to shape pump and Stokes beams into optical vortices with various integer values of topological charge, and cross them in a Raman-active crystal to produce multiple Stokes and anti-Stokes sidebands. We measure the resultant vortex charges using a tilted-lens technique. We verify that in every case the generated beams' topological charges obey a simple relationship, resulting from angular momentum conservation for created and annihilated photons, or equivalently, from phase-matching considerations for multiple interacting beams.

published proceedings

  • Opt Express

author list (cited authors)

  • Zhdanova, A. A., Shutova, M., Bahari, A., Zhi, M., & Sokolov, A. V.

citation count

  • 18

complete list of authors

  • Zhdanova, Alexandra A||Shutova, Mariia||Bahari, Aysan||Zhi, Miaochan||Sokolov, Alexei V

publication date

  • December 2015