| 摘要 |
An optical coupler and a method of manufacturing the same are provided. The optical coupler includes an input optical waveguide (I) and N output optical waveguides (O1, O2, ...), and divides an optical signal received from the input optical waveguide (I) into N optical signals. The optical coupler further includes a plurality of Y-junction optical waveguides configured in m stages, for branching the received optical signal into two optical signals a t each stage, and a plurality of curved optical waveguides alternately connect ed to the Y-junction optical waveguides, at least one curved optical waveguide connected between Y-junction optical waveguides, in the m-th stage and the output optical waveguides, wherein when the guiding direction of the optical signal is set to be the longitudinal axis, and the junction between the inpu t optical waveguide and the first-stage Y-junction optical waveguide is set to be the starting point, the positions and sizes of the Y-junction waveguides and the curved optical waveguides are determined in order to minimize the longest path among N paths ranging from the starting point to each of the output optical waveguides. An optical coupler is manufactured using Y-juncti on optical waveguide modules (J11, J12, ...) and connection optical waveguide modules (B11, B21, ...), such that various Y-junction optical waveguide structures can be designed. Also, the degree of freedom upon layout of modul es is increased, so that design of the optical coupler is easy.
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