Extended triangular lattice type photonic bandgap fiber

Optical waveguides – Optical fiber waveguide with cladding – Utilizing nonsolid core or cladding

Reexamination Certificate

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C385S126000

Reexamination Certificate

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07551824

ABSTRACT:
An extended triangular lattice type photonic bandgap fiber, includes a cladding and a capillary core, the cladding having a plurality of holes disposed within a silica glass portion in a longitudinal direction of the fiber and arranged in an extended triangular lattice shape, the capillary core having a plurality of holes arranged in a triangular lattice shape, wherein the cross-sectional area of the respective holes in the capillary core is smaller than that of the respective holes in the cladding.

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Takenaga et al. “A New Photonic Bandgap Fibre with Extended Triangular Lattice and Capillary Core”, ECOC 2005 Proceedings-vol. 2 Paper Tu 1.4,2.
R Goto and al.: “wide-band single-mode photonic band-gap fiber with extended triangular lattice and capillary core” Proceedings Optical Fiber Communication Conference 2006, Mar. 5, 2006, pp. 1-3, XP002442304 Piscataway, NJ USA * p. 2 *.
Katsuhiro Takenaga et al.: “a new photonic bandgap fibre with extended triangular lattice and capillary core” Proceedings ECOC 2005, vol. 2, Sep. 25, 2005, pp. TU 4.2-1-TU 4.2-2, XP002442305 Glasgow, GB * the whole document *.
Barkou S E et al.: “Photonic bandgap fibers” LEOS '99. IEEE Lasers and Electro-Optics Society 1999 12th Annual Meeting San Francisco, CA, USA Nov. 8-11, 1999, Piscataway, NJ, USA,IEEE, US, vol. 2, Nov. 8, 1999, pp. 615-616, XP010360970 ISBN: 0-7803-5634-9 * figure 1 *.

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