Analysis Of Microbending Losses On A Single-Mode, Step-Index Fiber At Higher-Order Harmonics Of Deformation Spectrum

Marek T. Wlodarczyk; S. R. Seshadri

doi:10.1117/12.949818

3 January 1986 Analysis Of Microbending Losses On A Single-Mode, Step-Index Fiber At Higher-Order Harmonics Of Deformation Spectrum

Marek T. Wlodarczyk, S. R. Seshadri

Author Affiliations +

Proceedings Volume 0566, Fiber Optic and Laser Sensors III; (1986) https://doi.org/10.1117/12.949818
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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.

Citation Download Citation

Marek T. Wlodarczyk and S. R. Seshadri "Analysis Of Microbending Losses On A Single-Mode, Step-Index Fiber At Higher-Order Harmonics Of Deformation Spectrum", Proc. SPIE 0566, Fiber Optic and Laser Sensors III, (3 January 1986); https://doi.org/10.1117/12.949818

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