Jpn. J. Appl. Phys. 45 (2006) pp. 6059-6063  |Next Article|  |Table of Contents|
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Selected Topics in Applied Physics

Photonic Crystals and Related Photonic Nanostructures

Invited Paper

Solid Photonic Bandgap Fibres and Applications

J. C. Knight, F. Luan, G. J. Pearce, A. Wang, T. A. Birks and D. M. Bird

Centre for Photonics and Photonic Materials, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom

(Received January 30, 2006; accepted April 8, 2006; published online August 4, 2006)

We report on the development of optical fibres which guide light in a solid core using a photonic bandgap effect. The photonic bandgap cladding consists of a two-dimensional array of isolated high-index regions in a lower-index matrix, with a relatively low index contrast. The core is one or more unit cells of the matrix material without the inclusions. The frequency bands for photonic bandgap guidance can be predicted by considering the cut-off frequencies of the guided modes of the high-index rods in the cladding using the weakly-guiding approximation. We demonstrate the basic properties of such fibres and their use as a wavelength-selective element in a fibre laser cavity.

DOI: 10.1143/JJAP.45.6059
KEYWORDS:photonic bandgap fibre, photonic crystal fibre, fibre laser

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