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

作     者：Mundus, M. Hohl-Ebinger, J. Warta, W. 

作者机构：Fraunhofer Inst Solar Energy Syst ISE D-79110 Freiburg Germany 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2013年第21卷第14期

页      面：17077-17088页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：Attenuation Computation methods Fiber properties Matrix methods Modal dispersion Plastic optical fibers 

摘      要：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. (C) 2013 Optical Society of America