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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 997–1002

Dependence of Bending Losses on Cladding Thickness in Plastic Optical Fibers

Gaizka Durana, Joseba Zubia, Jon Arrue, Gotzon Aldabaldetreku, and Javier Mateo  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 997-1002 (2003)
http://dx.doi.org/10.1364/AO.42.000997


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Abstract

Our main goal is to provide a comprehensive explanation of the existing differences in bending losses arising from having step-index multimode plastic optical fibers with different cladding thicknesses and under different types of conditions, namely, the variable bend radius <i>R</i>, the number of fiber turns, or the fiber diameter. For this purpose, both experimental and numerical results of bending losses are presented for different cladding thicknesses and conditions. For the measurements, two cladding thicknesses have been considered: one finite and another infinite. A fiber in air has a finite cladding thickness, and rays are reflected at the cladding-air interface, whereas a fiber covered by oil is equivalent to having an infinite cladding, since the very similar refractive index of oil prevents reflections from occurring at the cladding-oil interface. For the sake of comparison, numerical simulations based on ray tracing have been performed for finite-cladding step-index multimode waveguides. The numerical results reinforce the experimental data, and both the experimental measurements and the computational simulations turn out to be very useful to explain the behavior of refracting and tunneling rays along bent multimode waveguides and along finite-cladding fibers.

© 2003 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics

Citation
Gaizka Durana, Joseba Zubia, Jon Arrue, Gotzon Aldabaldetreku, and Javier Mateo, "Dependence of Bending Losses on Cladding Thickness in Plastic Optical Fibers," Appl. Opt. 42, 997-1002 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-997


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