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AssigneeSEIREN KST Corp.
InventorsAkira HIMENO, Koichi HORII, Osamu KAWASAKI, Kazuki IWABATA, Yuuta YABE, Yojiro KAMEI
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The present invention provides an optical multiplexer that includes waveguides forming an asymmetric shape with respect to the light traveling direction and can work as designed even when it is obtained through a heat treatment. The optical multiplexer includes at least three input optical waveguides, at least two directional couplers, and at least one output optical waveguide such that the waveguides including the input optical waveguides form an asymmetric shape with respect to a light traveling direction. The optical multiplexer further includes at least one dummy waveguide that is in a horizontally flipped shape of a waveguide located asymmetrically with respect to a center line of the directional couplers or a Mach-Zehnder interferometer composed of a combination of two of the directional couplers. Thus, a waveguide in a light coupling section of each of the directional couplers is prevented from falling inward.
An optical multiplexer comprising at least three input optical waveguides, at least two directional couplers, and at least one output optical waveguide such that the waveguides including the input optical waveguides form an asymmetric shape with respect to a light traveling direction, the optical multiplexer further comprising at least one dummy waveguide that is in a horizontally flipped shape of a waveguide located asymmetrically with respect to a center line of the directional couplers or a Mach-Zehnder interferometer composed of a combination of two of the directional couplers.
Dependencies are inferred from the claim text.