Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 28, 2009
Patent Application Number
11772946
Date Filed
July 3, 2007
Patent Primary Examiner
Patent abstract
A single mode optical transmission fiber comprises a depressed core having at least 0.41 weight percent fluorine and an index difference (|Δn1|) with pure silica greater than 1.5×10−3, a depressed cladding having at least 1.2 weight percent fluorine and an index difference (|Δn2|) with pure silica greater than 4.5×10−3 and an index difference (|Δn2|−|Δn1|) with the depressed core greater than or equal to 3×10−3.
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