Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2005-06-07
2005-06-07
Lee, John R. (Department: 2881)
Optical waveguides
Optical fiber waveguide with cladding
C385S141000, C385S142000
Reexamination Certificate
active
06904213
ABSTRACT:
The invention provides a step index optical fiber which presents cladding having an index lower than the index of silica and a core with an index higher than the index of silica. The fiber is obtained by drawing a preform made by chemical vapor deposition using a deposition tube of index lower than the index of silica. Inner cladding of index substantially equal to the index of the deposition tube, and then a core of index higher than the index of the inner cladding are deposited in succession therein. The invention makes it possible to obtain a fiber having a large effective area, reduced attenuation, and suitable for being fabricated at low cost by chemical vapor deposition.
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Beaumont Florent
Campion Jean-Florent
de Montmorillon Louis-Anne
Fleury Ludovic
Gorlier Maxime
Alcatel
Gurzo Paul M.
Lee John R.
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