Bend resistant multimode optical fiber
AssigneeCorning Incorporated
InventorsScott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Gaozhu Peng, Peter Joseph Ronco, Pushkar Tandon
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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 first region having index delta percent Δ2, a depressed-index annular portion having Δ3, and a third annular region surrounding the depressed annular region comprising refractive index delta percent Δ4; wherein Δ1MAX>Δ4>Δ2>Δ3, wherein the difference between Δ4 and Δ2 is greater than or equal to 0.03%.
Claims20
A multimode optical fiber comprising:
- a central multimode core region comprising maximum refractive index delta percent Δ1, a first inner annular region surrounding said core comprising refractive index delta percent Δ2, a depressed annular region surrounding said inner annular region and comprising Δ3 and a third annular region comprising refractive index delta percent Δ4 which is greater than Δ2 at a radial point less than or equal to 45 microns from the center of the fiber, the third annular region surrounding the depressed annular region;
- wherein Δ1MAX>Δ4>Δ2>Δ3, wherein the difference between Δ4 and Δ2 is greater than or equal to 0.03 delta percent.
A multimode optical fiber comprising:
- a central multimode core region comprising a maximum refractive index delta percent Δ1, said multimode core region extending to a radial point R1 having refractive index delta percent Δ2, Δ2 being the refractive index delta percent measured at the radial location where the first derivative d(Δ %/Δ % max)/d(r/R1) is equal to −2.5, Δ % max being the maximum core delta and R1 being the core radius estimated by fitting the core index profile to an alpha profile , a depressed annular region surrounding said core region comprising Δ3 and an outer annular region surrounding the depressed annular region comprising refractive index delta percent Δ4 which is greater than Δ2 at a radial point less than or equal to 45 microns from the center of the fiber;
- wherein Δ1MAX>Δ4>Δ2>Δ3, wherein the difference between Δ4 and Δ2 is greater than or equal to 0.03 delta percent
Dependencies are inferred from the claim text.