Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2005-01-18
2005-01-18
Font, Frank G. (Department: 2877)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000, C385S125000
Reexamination Certificate
active
06845204
ABSTRACT:
An optical fiber having a periodical cladding structure providing an photonic band gap structure with superior qualities. The periodical structure being one wherein high index areas are defined and wherein these are separated using a number of methods. One such method is the introduction of additional low index elements, another method is providing elongated elements deformed in relation to a circular cross section. Also described is a cladding structure comprising elongated elements of a material having an index of refraction higher than that of the material adjacent thereto. Using this additional material, prior art structures may obtain much better qualities.
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Barkou Stig Eigil
Bjarklev Anders Overgaard
Broeng Jes
Crystal Fibre A/S
Font Frank G.
Mooney Michael P.
Morgan & Finnegan , LLP
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