NDLI: Waveguide parameter design of graded-index plastic optical fibers for bending-loss reduction

Content Provider	IEEE Xplore Digital Library
Author	Makino, K. Ishigure, T. Koike, Y.
Copyright Year	1983
Abstract	The waveguide structure of graded-index plastic optical fibers (GI POFs), such as index profile, numerical aperture (NA), and core diameter, is appropriately designed for eliminating bending losses, even under a severe bending condition. The bending loss of GI POFs under a severe bending condition is drastically reduced when the core diameter is smaller than 200 /spl mu/m and when the NA is higher than 0.25. The bending loss of GI POFs even under a severe bending condition vanishes with a core diameter of 200 /spl mu/m and an NA of 0.24. It is experimentally confirmed for the first time that the mode coupling due to the bending induces the bending loss. The mode coupling strength before the fiber is bent affects the bending loss seriously. Moreover, the mode-coupling strength is evaluated by the propagation constant difference /spl Delta//spl beta/ between the adjacent modes. The /spl Delta//spl beta/ value, which is a function of the core diameter and NA, affects the bending loss. Therefore, based on the calculation of the /spl Delta//spl beta/, we propose a guideline for the appropriate design of waveguide parameters for GI POF, in order to suppress the bending loss.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2108
Ending Page	2114
Page Count	7
File Size	232522
File Format	PDF
ISSN	07338724
Volume Number	24
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical waveguides Optical design Plastics Optical fibers Refractive index Polymers Apertures Optical losses Bandwidth Optical fiber LAN refractive index profile Bending loss core diameter fiber bending graded-index plastic optical fiber (GI POF) mode coupling numerical aperture (NA)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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