Optical waveguides – Optical fiber waveguide with cladding – Utilizing nonsolid core or cladding
Reexamination Certificate
2007-05-01
2007-05-01
Pak, Sung (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing nonsolid core or cladding
C385S126000
Reexamination Certificate
active
11262965
ABSTRACT:
The present invention relates to an optical fiber having a configuration which enables utilization of nonlinear phenomena in the near-infrared region. The optical fiber is directed to a holey fiber having a core region extending along a predetermined axis and a cladding region with plural holes arranged along the core region. The plural holes are arranged to constitute plural layers about the core region in the cross-section orthogonal to the predetermined axis. The three holes constituting the first layer (the innermost layer) closest to the core region correspond to three vertexes from among the six vertexes of a regular hexagon and are placed such that the arrangement of the three holes has three-fold rotational symmetry. The optical fiber enables utilization of nonlinear phenomena in the near-infrared region, by properly adjusting the hole diameter d and the pitch L between adjacent holes from among the holes constituting a single layer.
REFERENCES:
patent: 6577801 (2003-06-01), Broderick et al.
patent: 6915053 (2005-07-01), Hasegawa
patent: 2004/0175084 (2004-09-01), Broeng et al.
K.P. Hansen, et al., “Fully Dispersion Controlled Triangular-Core Nonlinear Photonic Crystal Fiber,” OFC2003, PD2, Optical Society of America.
K.P. Hansen, “Dispersion flattened hybrid-core nonlinear photonic crystal fiber,” Optics Express, Jun. 30, 2003, pp. 1503-1509, vol. 11, No. 13, Optical Society of America.
Katayama Tetsutarou
Saito Tatsuhiko
Takahashi Kenichiro
McDermott Will & Emery LLP
Pak Sung
Sumitomo Electric Industries Ltd.
Wong Tina M.
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