Bend Resistant Multimode Optical Fiber
AssigneeCorning Incorporated
InventorsJohn Steele Abbott, III, Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Chukwuemeka Benneth Onuh, Kimberly Ann Wilbert
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Abstract
Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index which is spaced from the core at least 0.5 microns and less than 4 microns.
Claims32
A multimode optical fiber comprising:
- a graded index glass core;
- and
- an inner cladding surrounding and in contact with the core, and a second cladding comprising a depressed-index annular portion surrounding the inner cladding, said depressed-index annular portion having a refractive index delta less than about −0.2% and a width of at least 1 micron, wherein the width of said inner cladding is at least 0.5 microns and less than 4 microns.
A multimode optical fiber comprising:
- a graded index glass core;
- and
- an inner cladding surrounding and in contact with the core, and a second cladding comprising a depressed-index annular portion surrounding the inner cladding, said depressed-index annular portion having a refractive index delta less than about −0.2% and a width of at least 1 micron, wherein the width of said inner cladding is at least 0.5 microns and said fiber further exhibits a 1 turn 10 mm diameter mandrel wrap attenuation increase, of less than or equal to 0.4 dB/turn at 850 nm, and an overfilled bandwidth greater than 1.5 GHz-km at 850 nm.
A multimode fiber comprising a graded index core, and a cladding surrounding said core, said cladding comprising an inner annular region and a depressed annular region surrounding the inner annular region, wherein the core has an outer radius R1 between 23 and 26 microns and said inner annular region comprises a width of greater than 0.5 microns and less than 3 microns, said inner annular region comprising a peak fluorine concentration greater than 0.2 wt percent and a peak germania concentration greater than 0.2 wt percent, said depressed annular region comprising a depressed-index having a refractive index delta less than about −0.2% and a width of at least 1 micron.
Dependencies are inferred from the claim text.