Document Type



This item is available under a Creative Commons License for non-commercial use only

Publication Details

Published in Journal of Lightwave Technology, Vol.27, 13, 2009, pp.2482-2488. Digital Object Identifier 10.1109/JLT.2008.2011499 Available from


Misalignment effects on the spectral characteristics of edge filters based on singlemode–multimode–singlemode (SMS) fibre structures are investigated numerically and experimentally. A modal propagation analysis is used with a set of guided modes calculated using the finite-difference method to determine the transmission loss of the SMS-based edge filters. A limit for the tolerable misalignment of the SMS fiber-based edge filter is proposed, beyond which the spectral performance of the SMS structure degrades unacceptably. The numerical results are verified experimentally with good agreement.