Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2006-12-21
2008-10-14
Font, Frank G (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S123000, C385S124000, C385S125000
Reexamination Certificate
active
07437044
ABSTRACT:
Methods and apparatus provide for birefringent waveguides suitable for optical systems exhibiting polarization dependence such as interferometer sensors including Sagnac interferometric fiber optic gyroscopes (IFOG). The waveguides, for some embodiments, may offer single polarization performance over lengths of about a kilometer or more due to polarization dependent attenuation. According to some embodiments, the waveguides incorporate a pure silica core for resistance to radiation-induced attenuation (RIA).
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GB Search Report, Application No. GB0800759.3, dated Mar. 31, 2008.
Dowd Edward M.
Kuczma Andrew S.
MacDougall Trevor W.
Pike Brian J.
Sanders Paul E.
Font Frank G
Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
Wong Eric
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