OPTICAL WAVEGUIDE AND MANUFACTURING METHOD THEREOF, OPTICAL DEVICE USING THE OPTICAL WAVEGUIDE
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United States of America Patent
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Mar 16, 2015
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Mar 16, 2015
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Abstract
An optical waveguide at least includes: a lower clad layer; a core that is disposed on the lower clad layer and includes an entrance plane and an emission plane; and an optical path converting mirror including an inclined surface that is neither in parallel with nor orthogonal to a plane formed by the lower clad layer. The core includes a restriction release plane. When one of two portions obtained by dividing the core in two at the restriction release plane that is on the side of the entrance plane is defined as a first core pattern portion and remaining one of the two portions on the side of the emission plane is defined as a second core pattern portion, the optical path converting mirror is disposed on an optical path of the first core pattern portion or an extension of the optical path. At least a part of the light that has entered through the entrance plane is reflected by the optical path converting mirror to have an optical path converted. At least a part of light with an optical path not converted to be in a substantially orthogonal direction is emitted from the emission plane.
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