Multimode optical fiber for high rate LAN, method for...

Details Multimode optical fiber for high rate LAN, method for... Multimode optical fiber for high rate LAN, method for...

2007-03-19

2010-06-29

Healy, Brian M (Department: 2883)

Optical waveguides

Optical fiber waveguide with cladding

C384S124000, C398S143000, C398S161000

Reexamination Certificate

active

07747119

ABSTRACT:
Disclosed is a method for manufacturing a multimode optical fiber for high data rate LAN using MCVD, which includes a deposition process for forming a clad layer and a core layer, doped with an additive for controlling a refractive index, on an inner wall of a quartz tube by injecting a deposition gas into the quartz tube and applying heat to outside of the quartz tube; and a collapse process, which is repeatedly conducted N times, for filling up a gap in the quartz tube by applying heat of a temperature over a deposition temperature to the quartz tube after the core layer is completely deposited. In the method, together with an N−1thcollapse process, an etching process of injecting a reaction gas for etching into the quartz tube is conducted in order to eliminate a portion of which refractive index is transformed due to evaporation of the additive.

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