Other

Corning Incorporated

Deborah Lynn Marlatt

Ming-Jun Li

Xin Chen

Anping Liu

Ji Wang

Joohyun Koh

Evelyn M Deliso

Claud E Lacy

According to one example of the invention an optical fiber comprises: (i) a silica based core, said core having a core diameter greater than 80 &#x3bc;m and a numerical aperture NA&#x2267;0.24; and (ii) a silica based cladding in contact with and surrounding the core and having a second index of refraction n, such that n&#x3e;n; wherein the cladding includes B and F. Preferably the numerical aperture NA is at least 0.3.

Optical fiber and a method of making

A method for controlling the refractive index achieved using a fluorine dopant gas, wherein CF,is employed as the dopant gas, and the soot preform is doped using the CF,for a time and temperature sufficient to result in a decrease in fluorine dopant nearest the surface which is in contact with the CF,gas.

Method of controlling fluorine doping in soot preforms

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Addison, NY, United States of America

Deborah Lynn Marlatt