Optical wave guide, an optical component and an optical switch
AssigneeOMRON Corporation
InventorsYukari Terakawa, Hayami Hosokawa
Life of this patent
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Abstract
An optical wave guide has a lower cladding layer formed on a substrate, and a Y-branched optical wave guide arranged on the lower cladding layer. The optical wave guide is covered with an upper cladding layer. Curved portions of the optical wave guide are tapered at the external circumferential sides and formed into a trapezoidal cross sectional shape, and effective refractive index of the optical wave guide is made small at the tapered external circumferential sides. Meanwhile, end surfaces of the optical wave guide are formed into a rectangular shape, thereby joint efficiency with optical fibers is increased.
Claims9
An optical wave guide comprising a core for confining and transmitting light, and the core being characterized in that a thickness at a center portion of a cross section thereof and a thickness at both sides of the cross section thereof have respectively different areas, and a cross sectional shape of the core varies along a lengthwise direction of the core.
An optical switch comprising a core having a branch portion and a heating module for heating the branch portion of the core, and the core being characterized in that a thickness at a center portion of a cross section thereof and a thickness at both sides of the cross section thereof have respectively different areas, and a cross sectional shape of the core varies along a lengthwise direction of the core.
Dependencies are inferred from the claim text.