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Figure 1. Autorouting feature creates optical and electrical connections in the generated layout
Opening the sample circuit as shown on the left in Figure 1 (the example file is available for download) generates the layout on the right. Note that the modulators now have both electrical and optical ports.
In the example shown in Figure 2, the light blue layer is used for the metal that routes vertically and the dark blue layer is used to route horizontally. The latest release of OptoDesigner includes an enhancement that allows the initial and final sections of the route to be done in a different layer by using a via to transfer to the standard horizontal or vertical layer. Because the electro-optic modulator has its metal pads on the dark blue metal layer, the routing must start on this same layer. The electrical autorouting function takes care of this automatically.
Figure 2. Example of horizontal and vertical routing transfer
Figure 1: (a) the schematic Nylon Q-plate structure; (b) the polarization state at the input side; (c) the polarization state at the output side.
Figure 2. The polarization state changes along the device to outside of device.
 S. Maccalli, et al., "Q-plate for millimeter-wave orbital angular momentum manipulation," Applied Optics, Vol. 52, No.4, February 1, 2013.
Synopsys Photonic Solutions has the most comprehensive Photonic IC foundry support in the industry, with Process Design Kits (PDKs) available from foundries around the world for photonic processes such as silicon, silicon nitride, indium phosphide, polymers, and silica-on-glass. Our PIC Design Suite has enabled more than 1,500 tapeouts.
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