Interferometric methods of vortex generation involve the interference of three or more plane waves. We show that spherical wave interference can produce vortex lattices similar to the one produced in the three-beam interference of plane waves. Three spherical waves of the same curvature are made to interfere in a shear interferometer introduced in a Mach–Zehnder configuration.
© 2007 Optical Society of America
Original Manuscript: May 23, 2007
Revised Manuscript: August 23, 2007
Manuscript Accepted: September 21, 2007
Published: November 8, 2007
Sunil Vyas and P. Senthilkumaran, "Vortex array generation by interference of spherical waves," Appl. Opt. 46, 7862-7867 (2007)