Multi-Core Fiber Route Control for Crosstalk Reduction
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Solution Overview
Problem
Current optical communication systems using multi-core fibers face limitations in transmission quality due to limited wavelength usage and severe signal-to-noise requirements, which restricts the increase in communication capacity and distance.
Innovation Solution
A control apparatus and method that selects the best core in a multi-core optical fiber for setting an optical communication route based on the quality of the optical transmission route, optimizing the route by using a first core in one section and potentially another core in a subsequent section to maintain high signal quality and reduce crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wavelength division multiplexing is used to increase communication capacity, then transmission capacity increases, but the number of usable wavelengths is limited and frequency utilization efficiency reaches a plateau
Solution Approach 1:
The patent transitions from wavelength division multiplexing (one-dimensional frequency utilization) to spatial division multiplexing using multi-core optical fibers. By utilizing multiple spatial cores within a single fiber, the system achieves additional transmission capacity without being limited by the finite number of wavelengths, effectively adding a spatial dimension to the communication capacity enhancement.
2Productivity
If advanced modulation systems are used to increase transmission capacity, then communication capacity increases, but signal-to-noise requirements become severe and transmission distance is limited
Solution Approach 1:
The patent segments the optical fiber into multiple independent cores, allowing each core to carry separate communication signals. This segmentation enables the system to distribute the transmission load across multiple cores rather than overloading a single core with high-capacity modulation, thereby maintaining signal quality while achieving high transmission capacity through parallel transmission across multiple cores.
3Productivity
If multi-core optical fiber is used to increase transmission capacity, then capacity per fiber increases, but transmission quality is affected due to crosstalk between cores
Solution Approach 1:
The patent applies local quality by selecting specific cores with favorable transmission characteristics for each communication route. Instead of treating all cores uniformly, the system evaluates and selects cores based on their specific properties (such as lower crosstalk characteristics) to optimize transmission quality for each particular route, allowing different cores to be used in different segments of the transmission path.
Data Source
AI summary
To improve transmission quality in a network using an MCF, a control apparatus is provided including: a reception unit that receives a request for setting an optical communication route from a start point node to an end point node; and a control unit that sets a route using a first core included in a plurality of cores of a multi core optical fiber (MCF) used in the start point node, based on quality of an optical transmission route in each of the plurality of cores.