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Published on: January 28, 2019
Self-pumped phase conjugation of light beams carrying orbital angular momentum
Mike Woerdemann1, Christina Alpmann, Cornelia Denz
1Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany. woerde@uni-muenster.de
Abstract:
We investigate the properties of angular momentum carrying vortex beams, reflected by a phase-conjugating mirror. It is shown that a self-pumped photorefractive phase-conjugating mirror is suitable to produce stable, high-fidelity phase conjugation of vortex beams. We prove that the topological charge of the vortex beam is maintained, and thus the angular momentum in the laboratory frame of reference is reversed, as it is expected by the time reversal property of the phase-conjugating mirror. The three dimensional interference pattern in front of the phase-conjugating mirror is studied and applications in optical traps are suggested.
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