Title

Use of skew rays in multimode fibers to generate speckle field with nonzero vorticity

Authors

Authors

M. A. Bolshtyansky; A. Y. Savchenko;B. Y. Zel'dovich

Comments

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Abbreviated Journal Title

Opt. Lett.

Keywords

DISLOCATIONS; Optics

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 lambda = 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. (C) 1999 Optical Society of America.

Journal Title

Optics Letters

Volume

24

Issue/Number

7

Publication Date

1-1-1999

Document Type

Article

Language

English

First Page

433

Last Page

435

WOS Identifier

WOS:000079513700003

ISSN

0146-9592

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