Abstract

Determination of orbital angular momentum of optical vortex beams has attracted the attention of many researchers over the last few years. For some applications, it is convenient to use a partially coherent vortex beam because of its robustness. In this work, we developed a method to measure the topological charge of a partially coherent vortex beam. Our method relies simply in the measurement of the minimum radius of a zero contour of the modulus of the cross-correlation function and in the measurement of the full width at half maximum of its central spot.

© 2020 Optical Society of America

Measurement of the integer and fractional topological charge of optical vortex beams by using crossed blades

Sanaz Foroughi Dehnoei and Saeed Ghavami Sabouri
Appl. Opt. 62(13) 3409-3415 (2023)

Topological charge of asymmetric optical vortices

Victor V. Kotlyar and Alexey A. Kovalev
Opt. Express 28(14) 20449-20460 (2020)

Robustness of a coherence vortex

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Appl. Opt. 55(27) 7544-7549 (2016)

Orbital angular momentum and topological charge of a multi-vortex Gaussian beam

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J. Opt. Soc. Am. A 37(11) 1740-1747 (2020)

Topological charge of a linear combination of optical vortices: topological competition

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Opt. Express 28(6) 8266-8281 (2020)