Back to results
US 8,081,854 B2Granted
Low bend loss optical fiber
AssigneesSehf-Korea Co., Ltd., Gwangju Institute of Science and Technology
InventorsYoung-Sik Yoon, Yeong-Seop Lee, Jin-Han Kim, Won-Taek Han, Seong-Min Joo, Dea-Hwan Oh
Life of this patent
Estimating the term…
Abstract
Disclosed is a low bend loss optical fiber including: a core; an inner layer disposed at outside of the core, which has a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing as it becomes farther from the core; and a trench layer disposed at outside of the inner layer, which has a lowest refractive index.
Claims9
A low bend loss optical fiber comprising:
- a core;
- an inner layer, disposed outside of, and adjacent, the core, having a refractive index lower than a refractive index of the core, the refractive index of the inner layer gradually decreasing from an inner circumference of the inner layer as a distance from the core increases;
- a trench layer, disposed outside of, and adjacent, the inner layer, having a lowest refractive index;
- and
- an outer layer, disposed outside of, and adjacent, the trench layer, having a refractive index that is higher than the lowest refractive index of the trench layer and lower than the refractive index of the core,
- wherein the refractive index of the trench layer continuously changes from an outer circumference of the inner layer to an inner circumference of the outer layer without maintaining constant in the refractive index of the trench layer, and the trench layer comprises:
- a first trench sub layer whose refractive index decreases continuously and linearly at a constant slope as a distance from the core increases;
- and
- a second trench sub layer, adjacent the first trench sub layer, having a refractive index that increases continuously and linearly at a constant slope as the distance from the core increases.
6 more elements
Dependencies are inferred from the claim text.