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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 5142–5150

Understanding origin of loss in large pitch hollow-core photonic crystal fibers and their design simplification

Sébastien Février, Benoît Beaudou, and Pierre Viale  »View Author Affiliations

Optics Express, Vol. 18, Issue 5, pp. 5142-5150 (2010)

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It is now commonly accepted that, in large pitch hollow-core ‘kagomé’ lattice fibers, the loss spectrum is related to resonances of the thin silica webs in the photonic crystal cladding. Moreover, coherent scattering from successive holes’ layers cannot be obtained and adding holes’ layers does not decrease the loss level. In this communication, cross-comparison of experimental data and accurate numerical modeling is presented that helps demonstrate that waveguiding in large pitch hollow-core fibers arises from the antiresonance of the core surround only and does not originate from the photonic crystal cladding. The glass webs only mechanically support the core surround and are sources of extra leakage. Large pitch hollow-core fibers exhibit features of thin walled and thick walled tubular waveguides, the first one tailoring the transmission spectrum while the second one is responsible for the increased loss figure. As a consequence, an approximate calculus, based on specific features of both types of waveguides, gives the loss spectrum, in very good agreement with experimental data. Finally, a minimalist hollow-core microstructured fiber, the cladding of which consists of six thin bridges suspending the core surround, is proposed for the first time.

© 2010 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 4, 2009
Revised Manuscript: January 16, 2010
Manuscript Accepted: January 16, 2010
Published: February 25, 2010

Sébastien Février, Benoît Beaudou, and Pierre Viale, "Understanding origin of loss in large pitch hollow-core photonic crystal fibers and their design simplification," Opt. Express 18, 5142-5150 (2010)

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