Generation of Optical Vortices by Linear Phase Ramps
Figure 5
(a) Phase distribution for linear array of inclined phase ramps with constant background. (b) Experimentally observed intensity distribution of propagated field when phase mask corresponding to (a) is displayed onto the SLM. (c) Formation of fork fringes when the propagated field interfers with a plane wave coming from the other arm of the Mach-Zehnder interferometer.
