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US 7,787,731 B2Granted
Bend resistant multimode optical fiber
AssigneeCorning Incorporated
InventorsDana Craig Bookbinder, Ming-Jun Li, Daniel Aloysius Nolan
Life of this patent
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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.
Claims23
A multimode optical fiber comprising:
- a graded index multimode glass core having a radius greater than 20 microns and less than 28 microns and an alpha between 2.1 and 2.3;
- and
- a glass cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion which is spaced from said core;
- wherein the fiber exhibits (a) a bandwidth of greater than 750 MHz-km at a wavelength of 850 nm, and (b) a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 1550 nm, in dB, of less than 1.5 dB.
1 more element
A multimode optical fiber comprising:
- a graded index multimode glass core having a radius greater than 20 microns and less than 28 microns;
- and
- a glass cladding surrounding and in contact with the core, the cladding comprising a depressed-index annular portion which comprises a profile volume with an absolute magnitude of greater than 100%-μm2, wherein the depressed-index annular region is offset from said core by at least 0.4 microns, and
- wherein the fiber exhibits (a) a bandwidth of greater than 750 MHz-km at a wavelength of 850 nm, and (b) a 1 turn 10 mm diameter mandrel wrap attenuation increase at a wavelength of 1550 nm of less than 1.5 dB.
1 more element
Dependencies are inferred from the claim text.