Photonic Circuit Path Selection for Low-Loss Optical Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Programmable Photonic Circuits suffer from optical losses and cross-talk due to light leakage, which degrade signal-to-noise ratio and increase latency.
Innovation Solution
A method and device that utilize a detector, such as a graphene patch, to measure optical losses along constituent sections of the photonic circuit, and a controller to select the optimal optical pathway based on these measurements, using algorithms like Dijkstra's to minimize loss and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light is transmitted through waveguides in photonic circuits, then optical connections are established between input and output ports, but optical losses occur due to light leakage from waveguides
Solution Approach 1:
The system pre-establishes multiple possible optical pathways between input and output ports before light transmission occurs. By having alternative routes prepared in advance, the system can quickly switch to a lower-loss pathway when leakage is detected, preventing signal quality degradation without interrupting the optical connection.
Solution Approach 2:
The photonic circuit dynamically selects and switches between multiple optical pathways based on real-time conditions. The system monitors optical loss characteristics and adaptively adjusts the active pathway, transforming a static waveguide network into a dynamic routing system that optimizes signal transmission by avoiding high-loss segments.
2Adaptability or versatility
If multiple optical pathways are provided in photonic circuits, then alternative routes are available for light transmission, but device complexity increases due to additional waveguide routing
Solution Approach 1:
The photonic circuit is segmented into multiple modular waveguide sections with discrete coupling points. Each segment can be independently controlled and switched, allowing the system to create multiple pathways through combinatorial routing of standardized modules. This segmentation enables pathway diversity without proportionally increasing overall system complexity.
Solution Approach 2:
The waveguide mesh structure serves multiple functions simultaneously: it provides optical transmission, enables pathway selection, and allows for loss characterization. The same physical infrastructure that routes light also facilitates the measurement and control needed for adaptive pathway selection, eliminating the need for separate dedicated components for each function.
3Ease of operation
If optical pathways with multiple constituent elements are used, then routing flexibility is achieved, but optical losses accumulate across multiple waveguide sections
Solution Approach 1:
The system implements feedback by monitoring optical loss characteristics of different waveguide sections and using this information to select optimal pathways. Loss measurements from constituent elements feed into the routing decision process, allowing the system to identify and avoid high-loss segments while maintaining routing flexibility for different input-output configurations.
Solution Approach 2:
The system changes operational parameters by selecting pathways with fewer constituent elements or lower individual loss characteristics based on established loss profiles. By varying the combination of waveguide sections used in each pathway, the system optimizes the total optical loss while preserving the ability to route between different ports as needed.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method of selecting an optical path through a photonic circuit between an input port and an output port, wherein there are a plurality of different optical pathways connecting the input port and the output port and each optical pathway is configured to contain a plurality of constituent elements, the method comprising: establishing at least one property of each of the constituent elements; and selecting the optical pathway based upon the established at least one property