Multi-Domain Photonic Simulation With Bidirectional Coupling
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Solution Overview
Problem
Conventional simulation methods for photonic devices fail to accurately model the complex interactions between electrical, optical, and thermal domains due to lack of bidirectional coupling, scalability, and efficiency, leading to inadequate representation of physical phenomena.
Innovation Solution
A composite, multi-domain simulation model that integrates domain-specific representations using actual or virtual ports and simulator API calls, allowing separate simulation with appropriate tools for each domain, and coordinated data exchange between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential simulation is used to partition electro-optical system into independent electrical and optical partitions, then simulation complexity is reduced and each partition can be simulated independently, but bidirectional coupling and feedback loops cannot be implemented
Solution Approach 1:
The simulation system is segmented into separate electrical and optical partitions that can be simulated independently using domain-specific tools. Each partition is represented by equivalent models (electrical equivalent representation for optical components, current sources for optical partition) that capture the essential behavior while allowing independent simulation, thus reducing overall simulation complexity.
Solution Approach 2:
The patent implements feedback mechanisms through waveform exchange between the electrical and optical partitions. Simulation results from one partition are exchanged with the other partition, enabling bidirectional coupling and feedback loops to be implemented. This allows the system to accurately represent physical phenomena while maintaining the benefits of separate simulations.
2Adaptability or versatility
If mixed-mode co-simulation is implemented with waveform exchange between partitions, then bidirectional coupling is enabled, but the models become overly simplified and fail to properly represent physical phenomena
Solution Approach 1:
The patent introduces intermediary models (electrical equivalent representation and current sources) that mediate between the electrical and optical partitions. These intermediaries enable bidirectional coupling and waveform exchange while maintaining the physical accuracy of the models. The intermediaries are designed to properly represent the coupling effects without oversimplifying the physical phenomena.
3Ease of operation
If conventional simulation tools are used for photonic devices, then ease of operation is maintained, but scalability and efficiency are insufficient for complex multi-domain interactions
Solution Approach 1:
The patent creates a universal simulation framework that can handle multiple domains (electrical, optical, thermal, mechanical) within a single integrated environment. The system provides domain-specific representations and tools for each physical domain while enabling unified simulation of complex multi-domain interactions, thus improving scalability and efficiency without sacrificing ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate, scalable, and efficient simulation of photonic devices by allowing bidirectional coupling and separate domain-specific simulations, improving design accuracy and reducing computational resources.
Implementation Method 1
a typical Mach-Zehnder modulator is made by using the plasma dispersion effect in a PN junction made inside an optical waveguide to modify the free carrier density which in turn modifies the effective index of the optical waveguide, thereby modifying the phase of the light at the output of the waveguide
Implementation Method 2
a change of 1-degree C. can cause a change in refractive index on the order of 2e-4 which is five times larger than the plasma dispersion effect used to modulate the signal
Data Source
AI summary
Provided is an improved method, system, and computer program product to implement simulation for photonic devices. A composite, multi-domain simulation model is disclosed, with connected domain-specific representations that allow the use of the most relevant simulator technology for a given domain. The model has external connection points either expressed as actual ports or virtual ones, embodied by simulator API calls in the model.