G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 6/26 (2006.01) G02B 6/255 (2006.01) G02B 6/36 (2006.01) G02B 6/38 (2006.01) G02B 6/42 (2006.01)
Patent
CA 2085218
Bends in optical fibers (14) can be miniaturized by reducing the diameter of a section (18) of the fiber in the region where bending (20) is desired. In one aspect of the invention radii of curvature less than 100 microns and very low optical power loss are achieved. A fiber with greatly reduced diameter (Fig. 1d, Section-b-b) may also be twisted about its longi- tudinal axis to a greater degree than a comparable length of larger diameter fiber. In another aspect of the invention, reduc-ing the cross-sectional area of fiber is not required. Bent sections of the fiber are thermally annealed forming stress free bends of minimum bend radius for long term applications. Any optical fiber can be processed by redrawing and/or chemical means to allow such bending or twisting. Bend or twist tolerant regions and annealed bends may be packaged separately or built integrally into a wide range of fiber optic components; sensors; networks, or systems with significant space savings, added performance features and mechanical flexibility.
Fitzgerald Paul W.
Gillham Frederick J.
Stowe David W.
Alcoa Fujikura Limited
Oyen Wiggs Green & Mutala Llp
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