Authors

X. Zhu; A. Schulzgen; H. Wei; K. Kieu;N. Peyghambarian

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Abbreviated Journal Title

Opt. Express

Keywords

DIFFRACTION-FREE BEAMS; NONDIFFRACTING BEAMS; WAVE-GUIDES; LENS; INTERFERENCE; PROPAGATION; AMPLIFIERS; LASERS; Optics

Abstract

Micron-sized white light propagation invariant beams generated by a simple and compact fiber device are presented. The all-fiber device is fabricated by splicing a short piece of large-core multimode fiber onto a small-core single mode white light delivery fiber. Because this fiber device offers an inherent spatial coherence, nondiffracting white light beams can be created with a temporally incoherent broadband light source (a halogen bulb) and, most importantly, the surrounding fringes don't fade as the bandwidth of the light source increases because the underlying physics of this fiber device is different from that of the axicon. White light Bessel-like beams have been generated from multimode fibers with core diameters of 50 mu m, 105 mu m, and 200 mu m. The distance of nondiffracting propagation of the white light Bessel beam increases with increasing core size of the multimode fiber. Propagation characteristics of red, green, and blue individual beams are also presented.

Journal Title

Optics Express

Volume

19

Issue/Number

12

Publication Date

1-1-2011

Document Type

Article

Language

English

First Page

11365

Last Page

11374

WOS Identifier

WOS:000292865500037

ISSN

1094-4087

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