Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tom Harald Birkeland0
Vegard B Larsen0
Inge Vintermyr0
Per Arne Osborg0
Tom Eirik Toften0
Date of Patent
February 12, 2008
0Patent Application Number
110974490
Date Filed
April 2, 2005
0Patent Primary Examiner
Patent abstract
An optical cable unit has a metal tube with a longitudinal laser-welded seam and at least one optical waveguide in the interior of the metal tube. The metal tube has a first inner layer and a second outer layer, where the first inner layer is made from copper and the second outer layer is made from austenitic steel. The longitudinal seam of both layers is laser welded and the seams of the layers are in superimposed alignment, where the laser welding is performed by a CO2 laser.
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