Cloud native EDA tools & pre-optimized hardware platforms
A tutorial covering the full PIC Design Flow with Synopsys Photonic Solutions, this application note will explain the following steps in the device to circuit design flow:
This tutorial creates a phase shifter custom PDK model. The associated files for this tutorial can be found here: <rsoft_dir>\examples\Utilities\CustomPDK\PhaseShifter\SiPhaseShifter.ind
Open the file SiPhaseShifter.ind and note the following:
Open the Multi-Physics Utility, check the bias voltage (-2 volt), and click OK to run simulations.
After running simulations, the following plots are generated:
Open the Utility by choosing Custom PDK Utility, located under Utility in the top CAD menu. Select the following settings:
Perform the following steps to load an AWG model in OptSim Circuit into the user libraries:
Create a blank Compound Component in OptSim Circuit, select CustomPS model and grating couplers, Y-splitters, S-bend waveguides, and straight waveguide from DemoFAB PDK to design an asymmetric Mach-Zehnder Modulator. Use the hard connection (dotted line) to connect each component.
Create a blank project in OptSim Circuit, add PRBS, electrical signal generator, CW laser, nonlinear fiber, and optical power monitor from Block mode models. Add an "incline CC" and load the CC of the asymmetric MZM.
Scan W_nm and V to find an optimal wavelength for efficiently modulating this MZM.
Once the simulations are complete, users can go back to the CC of MZM, and select Open OptoDesigner to export this schematic model to layout generation. Users can then select Update in OptoDesigner to generate the layout, which they can then modify or add a mask for the doped region.
In this tutorial, a customized phase shifter was demonstrated from device level, to circuit level, to layout generation. The RSoft Multi-Physics Utility was used to simulate Carrier Effects in the depletion P-N junction and export it as a custom PDK in OptSim Circuit. By combining OptSim and OptSim Circuit, optical signals after propagating a 100m nonlinear fiber can be analyzed. The layout of the Mach-Zehnder Modulator can then be directly generated from OptSim Circuit to OptoDesigner.