The superposition of noncoaxial light beams containing screw wave-front dislocations is shown to create light patterns with a richer vortex content than that given by the arithmetic of the topological charges of the individual beams. We report the experimental observation of this phenomenon.
© 2000 Optical Society of America
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(260.0260) Physical optics : Physical optics
Gabriel Molina-Terriza, Jaume Recolons, and Lluis Torner, "The curious arithmetic of optical vortices," Opt. Lett. 25, 1135-1137 (2000)