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:
Jul. 09, 2002
Filed:
Dec. 28, 2001
Yasutake Ohishi, Tokyo, JP;
Atsushi Mori, Tokyo, JP;
Makoto Yamada, Tokyo, JP;
Hirotaka Ono, Tokyo, JP;
Terutoshi Kanamori, Tokyo, JP;
Toshiyuki Shimada, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A tellurite glass as a glass material of optical fiber and optical waveguide has a composition of 0<Bi O ≦20 (mole %), 0≦Na O≦35 (mole %), 0≦ZnO≦35 (mole %), and 55≦TeO ≦90 (mole %). The tellurite glass allows an optical amplifier and a laser device that have broadband and low-noise characteristics. In a splicing structure of non silica-based optical fiber (as a first fiber) and a silica-based optical fiber (as a second fiber), optical axes of the first and second optical fibers are held at different angles &thgr; and &thgr; (&thgr; ≠&thgr; ) respectively from a vertical axis of a boundary surface between their spliced ends, and a relationship between the angles &thgr; and &thgr; satisfies Snell's law represented by an equation of sin &thgr; /sin &thgr; =n /n (where n is a refractive index of the first optical fiber and n is a refractive index of the second optical fiber) at the time of splicing the first and second optical fibers.