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Proceedings Paper

Analysis Of Microbending Losses On A Single-Mode, Step-Index Fiber At Higher-Order Harmonics Of Deformation Spectrum
Author(s): Marek T. Wlodarczyk; S. R. Seshadri
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Paper Abstract

A new analytical technique for analyzing microbending losses of step-index, single-mode fibers is reported. The technique is applicable to fibers with arbitrary N.A., large deformation periods and radiation escaping at arbitrary angles to fiber axis. Two dimensional fiber deformations can be studied and information on radiation loss, propagation directions and polarization content of scattered radiation can be obtained. The effect of fiber radius on radiation loss and the distribution of radiation power between different space harmonics is investigated. It is found that radiation loss depends strongly on fiber radius and that the maximum loss for different space harmonics occurs at the same radius. At the fiber radius resulting in maximum loss, the radiated power is sharply peaked around optimum period lengths for both fundamental and higher-order space harmonics. It is shown that the fraction of radiated power in a higher-order space harmonic can be larger than that in the fundamental space harmonic at large deformation periods. The results indicate that microbending sensors do not necessarily have to operate at the fundamental harmonic of deformation spectrum.

Paper Details

Date Published: 3 January 1986
PDF: 8 pages
Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); doi: 10.1117/12.949818
Show Author Affiliations
Marek T. Wlodarczyk, General Motors Research Laboratories (United States)
S. R. Seshadri, University of Wisconsin (United States)


Published in SPIE Proceedings Vol. 0566:
Fiber Optic and Laser Sensors III
Emery L. Moore; O. Glenn Ramer, Editor(s)

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