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Elliptical vortex generated by the wedge on imparting phase shifts of (a) , (c) , and (e) . Frames (b), (d), and (f) show structurally stable optical vortices with high value at the vicinity of focal plane generated in frames (a), (c), and (e) respectively.
(a) and (c) Simulation and experimental results of an optical vortex generated by a wedge on imparting a phase shift of , respectively. Frames (b) and (d) show structurally unstable optical vortex at the vicinity of focal plane generated in frames (a) and (c), respectively.
(Color online) Optical vortex beam generated by a wedge on imparting phase shifts around (a) and (b) . The birth of the additional optical vortex is highlighted by an arrow in frame (a).
(Color online) Plot of value of optical vortex (OV) on tailoring the phase shift imparted by a wedge for different wavelengths and the plot of value of structurally stable OV near the focal plane (within the tolerance zone).
(Color online) (a) Femtosecond elliptical optical vortex generated from a wedge at a distance of . (b) Femtosecond vortex beam with value at the focal plane vicinity.
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