Lens unit, optical waveguide device, and optical transmission device
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorsKei Katou, Hideki Ichimei
Life of this patent
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Abstract
Mechanical strength of a lens that optically couples an optical waveguide and an optical fiber provided on a substrate is improved. A lens unit that optically couples an optical waveguide provided on a substrate and an optical fiber has a lens portion and a holding portion that holds the lens portion, and the holding portion has a thick portion, along one side surface that is not a surface through which an optical axis passes, in which a thickness measured in a direction of the optical axis is larger than a thickness of an other portion of the holding portion.
Claims10
A lens unit that optically couples an optical waveguide provided on a substrate and an optical fiber, the lens unit comprising:
- a lens portion;
- and
- a holding portion that holds the lens portion,
- wherein
- the holding portion has a thick portion, along one side surface that is not a surface through which an optical axis of the lens portion passes, in which a thickness of the holding portion measured in a direction of the optical axis is larger than a thickness of an other portion of the holding portion, and
- the thick portion has an inclined portion whose thickness continuously decreases toward the lens portion.
An optical waveguide device comprising:
- an optical waveguide element that has an optical waveguide provided on a substrate;
- a chassis that accommodates the optical waveguide element;
- an input optical fiber and an output optical fiber that propagate input light and output light of the optical waveguide element;
- and
- a lens unit that is disposed between the optical waveguide element and the input optical fiber and the output optical fiber, and that optically couples the optical waveguide provided on the substrate and the input optical fiber and the output optical fiber, the lens unit comprising:
- a lens portion;
- and
- a holding portion that holds the lens portion,
- wherein the holding portion has a thick portion, along one side surface that is not a surface through which an optical axis of the lens portion passes, in which a thickness of the holding portion measured in a direction of the optical axis is larger than a thickness of an other portion of the holding portion.
Dependencies are inferred from the claim text.