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Estimation of angle-dependent mode coupling and attenuation in step-index plastic optical fibers from impulse responses

 
: Mundus, M.; Hohl-Ebinger, J.; Warta, W.

:
Postprint (PDF; )

Optics Express 21 (2013), No.14, pp.17077-17088
ISSN: 1094-4087
English
Journal Article, Electronic Publication
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Servicebereiche; CalLab PV Cells; Kalibrierlabor für Solarzellen (CalLab PV Cells); Optics; Characterization

Abstract
We report on a method for estimation of angle-dependent mode coupling and attenuation in step-index plastic optical fibers (SI-POFs) from the shapes of impulse responses at two different fiber lengths. While alternating the fiber lengths, deviations between simulated and reference impulse responses are minimized by optimizing both mode coupling and attenuation parameters using pattern-search routines. Applying a matrix-based finite-difference approach to Gloge's time-dependent power flow equation fast computation of simulated impulse responses is enabled. We demonstrate that mode-dependent coupling and attenuation parameters converge to values that reconstruct fiber characteristics reported by other authors. We show that our results can be used for prediction of impulse responses, yielding determination of frequency responses, fiber bandwidths and coupling lengths. We conclude that our method enables characterization of SI-POFs from fiber impulse response measurements.

: http://publica.fraunhofer.de/documents/N-256409.html