Optical Network-on-Chip Simulation Using Equivalent Models
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Solution Overview
Problem
Conventional simulation methods for optical network-on-chip systems are slow due to complex calculations and struggle to accurately measure signal-to-noise ratio (SNR) considering phase effects, leading to prolonged design times and inefficiencies.
Innovation Solution
A simulation method that synchronizes the calculation periods of microring resonator modulators and switches using linear modeling, generating an equivalent model to simulate optical network-on-chip systems, which includes interpolating calculation periods and considering phase effects to improve SNR measurement and power optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional simulation methods (FDTD or verilog-AMS) are used to simulate optical network-on-chip systems, then physical accuracy is maintained, but simulation time becomes excessively long (several hours or tens of days)
Solution Approach 1:
The patent creates a virtualized equivalent model that copies the essential functional behavior of optical network-on-chip systems without performing complex physical calculations. The model uses simplified representations of optical components (waveguides, modulators, switches) that capture key characteristics while eliminating computationally intensive FDTD or verilog-AMS simulations, thereby reducing simulation time from hours/days to minutes while maintaining adequate accuracy for design verification
Solution Approach 2:
The patent transforms the simulation approach by changing fundamental parameters of the simulation model. Instead of using continuous physical field equations (FDTD) or complex hardware description (verilog-AMS), the invention uses discrete mathematical models with simplified parameters that represent optical component behavior. This parameter transformation enables rapid simulation while preserving essential system characteristics for design validation
2Reliability
If conventional simulation methods are used, then physical properties are calculated using complex formulas, but the simulation becomes too slow for efficient design iteration
Solution Approach 1:
The patent extracts only the essential functional relationships from complex optical physics and represents them through simplified mathematical models. By taking out only the necessary behavioral characteristics of optical components (transmission, modulation, switching) and eliminating complex physical calculations, the model maintains reliability for design verification while enabling rapid iteration through minimal computational overhead
3Measurement precision
If conventional simulation methods are used, then phase effects are included in the simulation, but accurate SNR measurement becomes difficult due to signal variation
Solution Approach 1:
The patent introduces an intermediary mathematical model that mediates between the complex physical reality of optical signals and the simplified simulation requirements. This intermediate representation handles phase effects and signal variations through controlled mathematical operations, enabling accurate SNR measurement while keeping the simulation model manageable in complexity through systematic abstraction
Data Source
AI summary
A simulation method and simulator for a system including a plurality of microring resonators, where the simulation method includes converting the plurality of microring resonators into an equivalent model, generating a virtual system including the equivalent model, inputting an input signal to the virtual system, and outputting an output signal from the virtual system.