Microbending loss evaluation in arbitrary-index single-mode optical fibers. Part II: Effects of core index profiles |
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Authors: | Sakai J |
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Affiliation: | Nippon Telegraph and Telephone Public Corporation, Tokyo, Japan; |
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Abstract: | Microbending losses in single-mode fibers with several types of core refractive index profiles are compared. Numerical calculations were carried out to characterize fibers with step, power-law,Wand ring-shaped index profiles. Step-index andWfibers exhibit a small excess loss near the single-mode operation upper limit. However, permissible offset misalignment in fiber splice at constant microbending loss is nearly identical for step, power-law, andWfibers. An index dip at the core center has an undesirable influence on the required splicing accuracy. The effects of fiber curvature statistics and index profile parameters are investigated in detail. |
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