Recently a laser analog of vortex generation behind an obstacle in a flow was demonstrated. Vortex generation occurs when tilted waves of different transverse structures are simultaneously excited in a laser. We have generalized this phenomenon to higher-order standing waves. Here typical phenomena expected for optical vortices, such as the excitation and disappearance of single vortices out of and into dark lines and dark areas, as well as vortex-pair creation and annihilation become apparent.
© 1997 Optical Society of America
J. T. Malos, R. Dykstra, M. Vaupel, and C. O. Weiss, "Vortex streets in a cavity with higher-order standing waves," Opt. Lett. 22, 1056-1058 (1997)