Optical fiber
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsHyang Kyun Kim, Shanhui Fan, Gordon S. Kino, Jonghwa Shin, Michel J. F. Digonnet, Vinayak Dangui
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Abstract
An optical fiber includes a cladding with a material having a first refractive index and a pattern of regions formed therein. Each of the regions has a second refractive index lower than the first refractive index. The optical fiber further includes a core region and a core ring having an inner perimeter, an outer perimeter, and a thickness between the inner perimeter and the outer perimeter. The thickness is sized to reduce the number of ring surface modes supported by the core ring.
Claims17
A method of making an optical fiber, the optical fiber comprising a material having a first refractive index and a pattern of regions formed therein, the regions having a second refractive index lower than the first refractive index, the method comprising:
- determining locations of intensity lobes of a highest frequency bulk mode within the cladding;
- and
- forming a substantially circular core region having an outer perimeter that does not intersect the maxima of the intensity lobes.
The method of 3, wherein the regions in the material are holes having walls defined by the surrounding material.
Dependencies are inferred from the claim text.