Title

Use Of Skew Rays In Multimode Fibers To Generate Speckle Field With Nonzero Vorticity

Abstract

Beams at the output of an axially symmetric multimode fiber were produced with mostly positive or negative values of angular index m through skew illumination of the input end of the fiber. In this way rays with predominantly positive or negative helicity were excited inside the fiber. The output cw speckle field at the wavelength λ = 632.8 nm contained large densities N+ and N- of wave-front dislocations, or optical vortices, of both positive and negative sign. Vorticity was defined as V = N+ - N-, was expressed analytically through the Wigner function of the field, and was found experimentally to be in good agreement with theory. © 1999 Optical Society of America.

Publication Date

4-1-1999

Publication Title

Optics Letters

Volume

24

Issue

7

Number of Pages

433-435

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.24.000433

Socpus ID

0001765860 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0001765860

This document is currently not available here.

Share

COinS