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发明公开
CN104252020A 偏振波转换元件 无效 - 撤回

偏振波转换元件
摘要：
本发明提供一种偏振波转换元件，具有定向耦合器，其具备相互平行地配置且分别具有芯的输入侧光波导路及输出侧光波导路。在与输入侧及输出侧光波导路的长边方向垂直的剖面，在将输入侧与输出侧光波导路相对的方向作为宽度方向并将与宽度方向垂直的方向作为高度方向时，输入侧与输出侧光波导路的芯的高度方向尺寸相等，输入侧及输出侧光波导路中至少一方的芯由矩形的下部芯与矩形的上部芯构成，上部芯以使宽度方向的一个侧面与下部芯的一个侧面处于一个平面上的方式配置在下部芯之上，且与下部芯相比宽度方向的尺寸小，定向耦合器构成为在输入侧光波导路进行波导的第一光与在输出侧光波导路进行波导的偏振方向与第一光正交的第二光耦合。
摘要（英）：

A polarization conversion device includes: a directional coupler that includes an input side optical waveguide and an output side optical waveguide which are disposed in parallel to each other and each of which has a core Assuming that a direction in which the input side optical waveguide and the output side optical waveguide face each other is a width direction and a direction perpendicular to the width direction is a height direction in a cross section perpendicular to a longitudinal direction of each of the input side optical waveguide and the output side optical waveguide, and the directional coupler is configured to couple first light guided through the input side optical waveguide to second light guided through the output side optical waveguide, the polarization direction of the second light is perpendicular to that of the first light.

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