The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2015
Filed:
Dec. 23, 2011
Evgeny Mikhailovich Dianov, Moscow, RU;
Sergei Lvovich Semenov, Moscow, RU;
Olga Nikolaevna Egorova, Moscow, RU;
Evgeny Mikhailovich Dianov, Moscow, RU;
Sergei Lvovich Semenov, Moscow, RU;
Olga Nikolaevna Egorova, Moscow, RU;
Abstract
The invention relates to optical fiber communications. A multicore optical fiber comprises at least two light-guiding cores made of doped fused silica with refractive indices n, n, n, each light-guiding core of the at least two light-guiding cores being surrounded by a respective arbitrarily shaped inner reflecting cladding made of fused silica or doped fused silica with refractive indices nc, nc, n, which are less than the refractive indices n, n, nof respective light-guiding cores; a continuous or intermittent barrier region made of fused silica and having an arbitrary cross-sectional shape, the barrier region being formed in the space between the inner reflecting claddings and an outer cladding of fused silica with refractive index n, the barrier region having refractive index n, which is less than the refractive index of each of the inner reflecting claddings; and an external protective coating. In another embodiment the barrier region can be formed of through holes in fused silica or doped fused silica.