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Misalignment Limits for a Singlemode–Multimode–Singlemode Fiber-Based Edge Filter

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5 Author(s)
Hatta, A.M. ; Appl. Optoelectron. Centre, Dublin Inst. of Technol., Dublin, Ireland ; Farrell, G. ; Pengfei Wang ; Rajan, G.
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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.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 13 )