| Popis: |
An optical vortex (OV) has a number of intrinsic properties, such as spiral phase structure, hollow-core intensity distribution or orbital angular momentum, which leads to many interesting applications in the field of frontier research, like cold atom trapping [1] , [2] , laser-plasma interaction [3] , or communications and quantum-information coding [4] , [5] . The determination of topological charge (TC) is an important aspect for OV’s characterization. In this work, we present a procedure to determine TC of an OV by probing the spiral phase plate (SPP) element with a laser beam of a different wavelength than the one for which SPP was designed. |
