Generation of multiply charged optical vortices and spatiotemporal helical beams using cascaded four-wave mixing

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this work, we suggest a method for simultaneous manipulation by the frequency and angular harmonics of light opening new opportunities for spatio-temporal shaping of optical waves. Amongst others, we demonstrate the effect of cascaded vortex generation, describe the counter-intuitive process of strong spatial compression induced by self-defocusing nonlinearity and generation of spatio-temporal helical beams in the soliton and non-soliton regimes. Our approach is based on the observation that the four-wave mixing (FWM) process in nonlinear materials imposes a selection rules not only on the frequency spacing between the interacting waves but also on their orbital angular momentum also called topological charge. The strong coupling between the temporal and spatial degrees of freedom is induced in such a process.
Original languageEnglish
Title of host publication2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference
Number of pages1
ISBN (Print)1557528470, 9781557528476
Publication statusPublished - 21 Nov 2007
EventNonlinear Photonics, NP 2007 - Quebec City, Canada
Duration: 2 Sep 20072 Sep 2007


ConferenceNonlinear Photonics, NP 2007
CityQuebec City

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics

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