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    Optical waveguide asymmetric Y junction
    2.
    发明公开
    Optical waveguide asymmetric Y junction 有权
    Optischer Wellenleiter mit unfrischer Y-Verzweigung

    公开(公告)号：EP1160592A1

    公开(公告)日：2001-12-05

    申请号：EP01201846.1

    申请日：2001-05-16

    申请人： NHK SPRING CO.LTD.

    发明人： Masuda, Michiya, NHK Spring Co., Ltd. ,  Takahashi, Fumio, NHK Spring Co., Ltd.

    IPC分类号： G02B6/12

    CPC分类号： G02B6/134 ,  G02B6/12004 ,  G02B6/125 ,  G02B6/132 ,  G02B2006/12123 ,  G02B2006/1215 ,  G02B2006/12154 ,  G02B2006/12173

    摘要： In an optical waveguide Y junction (1), comprising an input waveguide path (3), a split portion (4) having one end smoothly connected to an end of said input waveguide path (3), and a pair of bifurcated ends, and a pair of output waveguide paths (5,6) each having an end smoothly connected to a corresponding one of said bifurcated ends of said split portion (4), the split portion (4) defines a modified asymmetric Y-shaped waveguide path which is defined by modifying an original symmetric Y-shaped waveguide path having a substantially constant width by removing an asymmetric wedge-shaped section from a side of the split portion interposed between the output waveguide paths (5,6). Thus, simply by changing the inner profile of the split portion, a desired uneven split ratio can be achieved without providing a spread out split portion or requiring any abrupt change in the shape of the waveguide path. This contributes to the reduction in the loss of the signal light. Also, a desired split ratio can be readily achieved by suitably changing the dimensions of the wedge-shaped section. In particular, by selecting a wedge-shaped inner profile, the design and fabrication of the junction can be simplified.

    摘要翻译： 在包括输入波导路径（3）的光波导Y结（1）中，一端平滑地连接到所述输入波导路径（3）的一端的分割部分（4）和一对分叉端 一对输出波导路径（5,6），每个输出波导路径（5,6）的端部平滑地连接到所述分割部分（4）的所述分叉端的对应的一个，所述分割部分（4）限定修改的非对称Y形波导路径， 通过从插入在输出波导路径（5,6）之间的分割部分的一侧去除不对称楔形截面来修改具有基本恒定宽度的原始对称Y形波导路径。 因此，简单地通过改变分割部分的内部轮廓，可以实现期望的不均匀分流比，而不需要扩展分割部分或者需要波导路径的形状的任何突然变化。 这有助于减少信号光的损失。 此外，通过适当地改变楔形部分的尺寸，可以容易地实现期望的分流比。 特别地，通过选择楔形内部轮廓，可以简化结的设计和制造。