Tunable axial bursts using annularly distributed phase masks

Abstract

We identify a family set of fractional power, annularly distributed phase-masks for generating axial irradiance bursts. We show that by changing the phase delay, for certain fractional power, one can generate either short tail or long tail axial irradiance bursts. To this end, we discuss the use of a pair of angularly modulated, Alvarez-Lohmann lens.