Method for the fabrication of fluoride glass single mode optical

Details Method for the fabrication of fluoride glass single mode optical Method for the fabrication of fluoride glass single mode optical

1994-12-22

1997-08-12

Hoffmann, John

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65404, 65429, 65388, 65 31, 216 97, 216 24, C03B 3712

Patent

active

056560567

ABSTRACT:
Fluoride glass optical fibers are fabricated by minimizing the number of high-temperature operations. A tube comprising an external layer of a first fluoride glass of composition suitable to form the cladding of the fiber and an internal layer of a second fluoride glass of composition suitable to form the core of the fiber is prepared by a conventional rotational casting technique. Then, the internal layer is thinned by means of chemical etching at ambient temperature until the attainment of a ratio between the volumes of the two layers that corresponds to the ratio between the core and cladding diameters required for a single mode fiber, and the resulting tube is drawn.

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