Glass optical waveguide
AssigneeAsahi Glass Company, Limited
InventorsYuki Kondo, Motoshi Ono, Naoki Sugimoto
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Abstract
In a glass optical waveguide having a core containing at least one oxide selected from the group of glass-constituting oxides consisting of Bi2O3, Sb2O3, PbO, SnO2 and TeO2, large transmission loss of light which occurs when the cross-sectional shape of the core is rectangle, is reduced. A glass optical waveguide which contains at least total 35% in mass % of at least one type of the above glass-constituting oxides, wherein the cross-sectional shape of the core is trapezoidal, among two parallel sides of the trapezoid, a long side is in a substrate side and among four sides constituting the trapezoid, angles of two oblique sides to the long side are each within a range of from 60 to 80°.
Claims9
A glass optical waveguide comprising a core and a clad made of a glass formed on a planar substrate, wherein the glass constituting the core contains total at least 35% in mass % of at least one type of oxide selected from the group consisting of Bi2O3, Sb2O3, PbO, SnO2 and TeO2 as glass-constituting oxide, cross sectional shape of the core is a trapezoid having a long side in the substrate side, and among four sides constituting the trapezoid, angles of two oblique sides to the long side are each within a range of from 60 to 80°.
Dependencies are inferred from the claim text.