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发明授权
CN107402489B 点对称马赫-曾德尔干涉仪设备 有权

点对称马赫-曾德尔干涉仪设备
摘要：
本发明提供一种点对称马赫‑曾德尔干涉仪(PSMZI)设备100，包括：三个连续的路径时延段PDS)，作为两个外部PDS 102和一个中心PDS 101，每个PDS 101、102包括上波导臂103和下波导臂104。所述PSMZI设备100也包括四个非对称耦合器(AC)，每个AC 105包括上波导部106和下波导部107。每个PDS 101、102的每一侧都直接设置有一个AC 105，且所述上下波导部106、107分别耦合至所述上下波导臂103、104。此外，在所述PDS 101、102一侧的所述AC 105与所述PDS 101、102另一侧的所述AC 105点对称；设置在所述中心PDS 101一侧的所述两个AC 105和所述一个外部PDS 102一起与设置在所述中心PDS 101另一侧的所述两个AC 105和所述一个外部PDS 102点对称。
摘要（英）：

The present invention provides a Point-Symmetric Mach-Zehnder-Interferometer (PSMZI) device 100, comprising three consecutive path delay sections (PDSs) provided as two outer PDS 102 and one center PDS 101, each PDS 101, 102 including an upper waveguide arm 103 and a lower waveguide arm 104. The PSMZI device 100 also includes four asymmetric couplers (ACs) each AC 105 including an upper waveguide portion 106 and a lower waveguide portion 107. One AC 105 is arranged directly on each side of each PDS 101, 102, the upper and lower waveguide portions 106, 107 being respectively coupled to the upper and lower waveguide arms 103, 104. Further, the AC 105 on the one side of the PDS 101, 102 is point-symmetric to the AC 105 on the other side of the PDS 101, 102, and the two ACs 105 and the one outer PDS 102 arranged on the one side of the center PDS 101 are together point-symmetric to the two ACs 105 and the one outer PDS 102 arranged on the other side of the center PDS 101.

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