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This example demonstrates the simulation of a ring (or racetrack) modulator and parameter extraction for CML Compiler for compact model generation. Simulation of the ring and racetrack resonators and modulators is best achieved by breaking the device into a series of sub-components (e.g. straight and bent waveguides, directional coupler, etc.), characterized separately using device-level simulations. These building blocks can then be combined into a circuit in INTERCONNECT to simulate the complete device. This approach provides accurate models while minimizing the overall simulation time. Direct simulation of large rings using 3D FDTD is not practical due to the large memory and time requirements, although it may be possible for some small rings. Here we will show how to simulate an active ring modulator in reverse bias. A similar approach can be used to simulate a ring resonator as well.
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