Optical device and method for producing same
AssigneesNGK Insulators, Ltd., NGK Optoceramics Co., Ltd.
InventorsYasunori Iwasaki, Akiyoshi Ide, Ryuji Tanabe
Life of this patent
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Abstract
An optical device includes a glass substrate provided with one or more V-shaped grooves and an optical fiber array having one or more optical fibers. The optical fiber array is fixed within the V-shaped grooves of the glass substrate using a fixing adhesive. As viewed from above, a first region Z1 (i.e., the region indicated by cross-hatching) and a second region Z2 are provided on the optical fiber array, and the fixing adhesive is applied within the first region Z1. A refractive index matching resin, providing refractive index matching at least with the optical fibers, is disposed in the second region Z2, wherein the second region Z2 may be surrounded by the first region Z1.
Claims12
An optical device comprising:
- a photodetector;
- a substrate having one or more V-shaped grooves defined therein;
- an optical fiber array having one or more optical fibers, said optical fiber array being fixed within the V-shaped grooves in said substrate by a fixing adhesive, and having an end face that performs a dividing function for dividing signal light propagated through the optical fiber array;
- wherein at least a first area in which said fixing adhesive is present and a second area corresponding to an opening defined by a hold down jig in which said fixing adhesive is not present, are present on said optical fiber array as viewed from above such that said second area is present at least within an optical path of divided light produced by said dividing function over said optical fiber array;
- said optical device further comprising a resin for achieving refractive index matching with at least said optical fibers, said resin being present in said second area located above said optical fiber array and on said optical path of divided light between said optical fibers and said photodetector.
A method of manufacturing an optical device, wherein said optical device includes a substrate having one or more V-shaped grooves defined therein, and an optical fiber array having one or more optical fibers, said optical fiber array being fixed within the V-shaped grooves in said substrate by a fixing adhesive, said method comprising:
- a first step of placing said optical fiber array within the V-shaped grooves in said substrate;
- a second step of placing a holding down jig, having a window in a portion thereof, on said optical fiber array;
- a third step of introducing said fixing adhesive between said holding down jig, said optical fiber array, and said V-shaped grooves;
- and
- a fourth step of, after said holding down jig is removed, introducing a resin that is different from said fixing adhesive into an area on said optical fiber array in which entry of said fixing adhesive was inhibited by the window of said holding down jig.
A method of manufacturing an optical device, wherein said optical device includes a substrate having one or more V-shaped grooves defined therein, and an optical fiber array having one or more optical fibers, said optical fiber array being fixed in the V-shaped grooves in said substrate by a fixing adhesive, said method comprising:
- a first step of placing said optical fiber array in the V-shaped grooves in said substrate;
- a second step of placing a holding down jig on said optical fiber array with an end face thereof being exposed;
- a third step of introducing said fixing adhesive into a first area between said holding down jig, said optical fiber array, and said V-shaped grooves;
- a fourth step of removing said hold down jig;
- and
- a fifth step of introducing a refractive index matching layer into a second area corresponding to an opening defined by said hold down jig.
Dependencies are inferred from the claim text.