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Design tool integrates optical design, simulation flow

Posted: 22 Sep 2014     Print Version  Bookmark and Share

Keywords:INTERCONNECT  Pyxis  Calibre  silicon photonics 

Mentor Graphics Corp. merged with Lumerical's INTERCONNECT to provide new silicon photonics design methodologies that leverage the Pyxis and Calibre platforms. With the INTERCONNECT integration, users are now able to perform optical circuit simulation directly from the Pyxis Schematic.

In addition, users can capture a photonic design and testbench, set up optical simulation parameters for transient and frequency analysis, perform simulation, and view results interactively from the Pyxis Schematic simulation cockpit. This boosts productivity and leverages the existing integration to high-capacity EZwave waveform viewer. While traditionally used as a viewer for mixed-signal waveforms in the electrical time domain, the EZwave viewer, which includes a built-in waveform-based calculator, an eye diagram tool, and TCL scripting, is also ideal for processing optical simulation results.

Complementing the Pyxis Schematic in the Pyxis custom IC design platform is Pyxis Implement, a tool for layout design. Known for its all angle editing capabilities, Pyxis Implement with schematic-driven layout enables users to quickly place and assemble photonic PCells using connectivity-driven waveguide routing with radial and adiabatic bends, as well as S-bend support. To complete this full-flow silicon photonics design methodology, Calibre tools perform DRC, LVS, lithography simulation, and smart-fill, ensuring photonic components meet the designed intent through the manufacturing process.


Lumerical INTERCONNECT for optical circuit simulation

Optical circuit simulation within the Pyxis platform design cockpit is performed by Lumerical's INTERCONNECT photonic integrated circuit design and simulation tool. Netlist import and export features added to INTERCONNECT as part of the integration project enable design capture, simulation set up, and execution within the Pyxis platform cockpit. Time domain and frequency domain simulations are run using the INTERCONNECT simulators and results are delivered for analysis to the EzWave viewer.

Key operating parameters of the photonic components for accurate simulation are defined in the PDK-driven design flow as INTERCONNECT compact models. The compact models can be derived from foundry specific or measured data, improving design accuracy and eliminating device revisions.

Mentor and Lumerical have been developing Process Design Kits (PDKs) enabling a silicon photonics design flow with OpSIS and CMC / SiEPIC. Mentor and Lumerical are also collaborating with A*STAR Institute of Microelectronics (IME), a technology leader in silicon photonics, to develop next generation PDK for their well established and widely adopted technology platform.





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