Analysis of light scattering in SI POFs by using side-illumination technique

I. Bikandi; M. A. Illarramendi; J. Zubia; G. Aldabaldetreku; G. Durana; M. Azkune

doi:10.1117/12.2080798

16 March 2015 Analysis of light scattering in SI POFs by using side-illumination technique

I. Bikandi, M. A. Illarramendi, J. Zubia, G. Aldabaldetreku, G. Durana, M. Azkune

Proceedings Volume 9360, Organic Photonic Materials and Devices XVII; 936017 (2015) https://doi.org/10.1117/12.2080798
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

One of the issues that affects the performance of plastic optical fibers (POFs) is the light scattering caused by the presence of inhomogeneities in the polymer, which is responsible for the optical energy loss and for the mode coupling in POFs. The aim of this work is to compare two different methods for measuring light scattered in step index polymer optical fibers (SI-POF) by using the side-illumination technique. On the one hand, scattered intensity and far-field patterns at single wavelength have been measured by varying the launching conditions: position of the excitation spot in the fiber and incidence angle. On the other hand, we have measured the spectral distribution of the scattered light in SIPOFs by exciting the fiber with a supercontinuum source. A theoretical model based on Mie theory has been used to analyze the obtained experimental results. From this analysis, the size and position of the most influential scattering centers in step-index POFs can be estimated. The results obtained employing both methods have been compared, resuming the advantages and drawbacks of each one for characterizing the optical quality on SI-POFs.

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I. Bikandi, M. A. Illarramendi, J. Zubia, G. Aldabaldetreku, G. Durana, and M. Azkune "Analysis of light scattering in SI POFs by using side-illumination technique", Proc. SPIE 9360, Organic Photonic Materials and Devices XVII, 936017 (16 March 2015); https://doi.org/10.1117/12.2080798

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KEYWORDS

Polymer optical fibers

Light scattering

Scattering

Interfaces

Polarization

Mie scattering

Cladding

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