Patent ID: 6948340

Claim:
A method of producing an elliptical core optical fiber comprising: providing an original preform having a circular core disposed at the center of a circular clad, processing the original preform to form a processed preform, drawing with heat the processed preform into an elliptic core optical fiber, obtaining a predetermined aspect ratio of the processed preform from the correlation between an aspect ratio of the processed preform and aspect ratio of the elliptical core of the optical fiber wherein said correlation is obtained for the material of the processed preform and drawing conditions, obtaining a predetermined core area to the sum of the core area and clad area ratio of the elliptic optical fiber from the correlation between the aspect ratio of the processed preform and a ratio of the core area to the sum of the core and clad area of the processed preform is obtained with the ratio of the core radius of the original preform, and wherein the processing of said original preform is derived from the obtained predetermined core area to the sum of the core area and clad area ratio of the elliptical optical fiber and the obtained aspect ratio.