G.V. Bogatirova, A.A. Ch.V. Felde, P.V. Polyanskii, Comparative analysis of techniques for diagnostics of phase singularities //Ukr. J. Phys. Opt. 2008, V9, №2 ,p.82-90

A comparative analysis of several techniques used for diagnostics of phase sin- gularities in the optical vortex beams and fields is performed. Both the advan- tages and shortcomings of implementation and application of those techniques are discussed.