Alcatel

Christine Labatut

Pierre Sillard

Louis-Anne De Montmorillon

Pascale Nouchi

Ludovic Fleury

Jean-Florent Campion

Maxime Gorlier

Florent Beaumont

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.

Step index optical fiber with doped cladding and core, a preform, and a method of fabricating such a fiber

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Conflans Ste Honorine, France

Christine Labatut