Modeling of realistic cladding structures for photonic bandgap fibers

Niels Asger Mortensen, Martin Dybendal Nielsen

Research output: Contribution to journalJournal articleResearchpeer-review


Cladding structures of photonic bandgap fibers often have airholes of noncircular shape, and, typically, close-to-hexagonal airholes with curved corners are observed. We study photonic bandgaps in such structures by aid of a two-parameter representation of the size and curvature. For the fundamental bandgap we find that the bandgap edges (the intersections with the air line) shift toward shorter wavelengths when the air-filling fraction f is increased. The bandgap also broadens, and the relative bandwidth increases exponentially with f2. Compared with recent experiments [Nature 424, 657 (2003)] we find very good agreement.
Original languageEnglish
JournalOptics Letter
Issue number4
Pages (from-to)349-351
Publication statusPublished - 2004


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