Experimental method for topological charge determination of optical vortices in a regular net

2007

SPIE Proceedings

The optical vortex interferometer (OVI) is based on the regular net of optical vortices, which are generated by the interference of three plane waves. In this paper the current state of the OVI is described. The paper starts with an outline of the OVI theory. In the next step the three different versions of the optical body of OVI are shortly described. The possible enhancements of the instrument are also discussed Next the methods for interfergoram analysis are presented and the possible applications of the OVI are listed and shortly discussed.

Section: Discussionmentioning

confidence: 99%

<title>The optical vortex interferometer AD 2006</title>

2007

SPIE Proceedings

“…There are many methods available to identify optical vortex charge for a single beam [50][51][52][53]. The methods for determining the charge sign distribution at vortex lattice are described in [54][55][56]. These methods can be used before measurement (as system calibration methods), and as such do not change the results of the measurements.…”

Section: Optical Vortex Latticementioning

confidence: 99%

Interferometry with Vortices

Senthilkumaran

International Journal of Optics

Sato

2012

Interference of optical beams with optical vortices is often encountered in singular optics. Since interferometry makes the phase observable by intensity measurement, it brings out a host of applications and helps to understand the optical vortex. In this article we present an optical vortex interferometer that can be used in optical testing and has the potential to increase the accuracy of measurements. In an optical vortex interferometer (OVI), a lattice of vortices is formed, and the movement of the cores of these vortices is tracked when one of the interfering beams is deformed. Instead of multiple vortices in an OVI, an isolated single vortex also finds applications in optical testing. Finally, singularity in scalar and vector fields is presented, and the relation between them is illustrated by the superposition of these beams.

“…This enables the extra errors compensation. The advantage of the OVI is that the topological charge of the vortices can be determined experimentally [18,19]. That means that the OVI is free of phase unwrapping problem.…”

Section: Three Beam Ovimentioning

confidence: 99%

<title>Optical vortex interferometry: AD 2007</title>

2008

SPIE Proceedings

The optical vortex interferometer (OVI) generates regular lattice of optical vortices. As in standard two beam interferometry the sample under measurements is introduced into one of the interferometer arm, which changes the vortex lattice geometry and position. These changes can be measured and recomputed to the values of physical quantities characterizing the sample. In this paper an overview of OVI configurations as well as basic properties is given. The other solutions based on the three or more plane waves' interference field are also presented in brief.