Faraday rotation single-mode optical fiber
AssigneeHoya Corporation
InventorsHidemi Tajima, Toshiharu Yamashita, Isao Masuda
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Abstract
A Faraday rotation single-mode fiber having a high Verdet constant is disclosed, the core and the cladding of the fiber being made of a glass having the following composition: 26 to 38 mol % SiO.sub.2, 18 to 34 mol % B.sub.2 O.sub.3, 17 to 26 mol % Al.sub.2 O.sub.3, 18 to 32 mol % Tb.sub.2 O.sub.3, 0 to 5 mol % ZrO.sub.2, 0 to 5 mol % Ce.sub.2 O.sub.3, 0 to 5 mol % Pr.sub.2 O.sub.3, 0 to 5 mol % Dy.sub.2 O.sub.3 and 0 to 5 mol % Ho.sub.2 O.sub.3, provided that the total amount of the above ingredients is not less than 97 mol % and the total amount of Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Dy.sub.2 O.sub.3 and Ho.sub.2 O.sub.3 is 0 to 5 mol %.
Claims2
A Faraday rotation single-mode fiber having a core and a cladding which are made of a glass having a composition comprising:
- ______________________________________ SiO.sub.2 26 to 38 mol %, B.sub.2 O.sub.3 18 to 34 mol %, Al.sub.2 O.sub.3 17 to 26 mol %, Tb.sub.2 O.sub.3 18 to 32 mol %, ZrO.sub.2 0 to 5 mol %, Ce.sub.2 O.sub.3 0 to 5 mol %, Pr.sub.2 O.sub.3 0 to 5 mol %, Dy.sub.2 O.sub.3 0 to 5 mol %, and Ho.sub.2 O.sub.3 0 to 5 mol %, ______________________________________
- provided that the total amount of the above ingredients is less than 97mol % and the total amount of Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Dy.sub.2 O.sub.3 and Ho.sub.2 O.sub.3 is from 0 to 5 mol %.
Dependencies are inferred from the claim text.