Reduction of coupling loss to photonic crystal fibers by controlled hole collapse: A numerical study

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Abstract

The mode profile evolution of small-core photonic crystal fibers (PCFs) during a gradual collapse of the cladding airholes is investigated. The mode overlap with standard step-index fibers having a small index contrast is calculated, and it is found that overlaps around 90% can be achieved in all cases studied, with the proper degree of hole collapse. Thus, hole collapse induced by, e.g. laser irradiation could prove an efficient and practical way of reducing splice losses when coupling small-core PCFs to other fiber types.
Original languageEnglish
JournalOptics Communications
Volume237
Issue number4-6
Pages (from-to)431-435
ISSN0030-4018
Publication statusPublished - 2004

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