Variable-radius focused optical vortex with suppressed sidelobes.
We propose a design for a phase mask for generating an optical vortex with suppressed sidelobes in the focal plane where the radius of the intensity ring is variable. A radial modulation added to conventional phase mask exp(iltheta) projects the light diffracted from different annular zones into a single intensity ring in the focal plane.
Lin
J
J
Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
Yuan
X-C
XC
Tao
S H
SH
Burge
R E
RE