Yy. Schechner et al., WAVE-PROPAGATION WITH ROTATING INTENSITY DISTRIBUTIONS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 54(1), 1996, pp. 50-53
General solutions representing rotations of intensity distributions ar
ound and along the propagation axis are derived for the paraxial wave
equation. The formation used is a key for understanding and synthesizi
ng such waves as experimentally demonstrated. A necessary and sufficie
nt condition for rigid rotation as well as limitations on the rotation
rate are obtained.