Multi-Core Optical Amplification Layout for Stable Relay Gain
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Solution Overview
Problem
The challenge lies in constructing an optical fiber transmission system that enables stable relay optical amplification using a coupled multi-core optical fiber as a transmission path, as current systems face issues with crosstalk and non-linear optical effects, leading to unstable gain and noise figure parameters.
Innovation Solution
The solution involves an optical amplification device and method that convert optical signal beams from a coupled state to a non-coupled state for amplification, using a non-coupled multi-core optical fiber with a double-clad structure, and then revert them back to a coupled state, allowing for stable amplification and extended transmission distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a coupled multi-core optical fiber is used as a transmission path, then transmission distance is extended due to reduced non-linear optical effects, but gain stability deteriorates due to crosstalk between cores
Solution Approach 1:
The patent segments the coupled multi-core optical fiber into distinct core regions and applies individual amplification to each core through separate pumping light sources. This segmentation isolates the signal paths, preventing crosstalk-induced gain instability while maintaining the extended transmission distance advantage of coupled multi-core fibers.
Solution Approach 2:
The patent applies local quality by providing each core with individually optimized amplification parameters and pumping conditions. This allows each core to maintain stable gain characteristics independent of adjacent cores, resolving the gain stability issue while preserving the long transmission distance capability of the coupled multi-core structure.
2Productivity
If the number of cores in an optical fiber is increased to expand communication capacity, then spatial multiplexing capability is improved, but compatibility with conventional optical amplifiers deteriorates
Solution Approach 1:
The patent segments the multi-core optical fiber signal into individual core channels, applying conventional single-core amplifier techniques to each segment independently. This segmentation approach enables the use of existing conventional optical amplifiers in multi-core systems, maintaining compatibility while achieving expanded communication capacity through increased core count.
Solution Approach 2:
The patent creates a universal amplification architecture that can handle multiple cores simultaneously using standardized amplifier components. By designing the amplification system to process each core independently yet uniformly, the invention enables conventional optical amplifiers to function in multi-core environments, achieving both high communication capacity and broad compatibility.
3Reliability
If a non-coupled multi-core optical fiber is used, then crosstalk between cores is reduced, but core density and number of cores that can be disposed deteriorates
Solution Approach 1:
The patent applies segmentation by treating each core as an independent amplification channel with dedicated pumping light sources. This individualized approach effectively reduces crosstalk impact on gain stability without requiring increased physical spacing between cores, thereby maintaining high core density while achieving reliable low-crosstalk performance.
Solution Approach 2:
The patent implements local quality by providing each core with locally optimized amplification conditions and independent pumping control. This localized approach minimizes inter-core interference and crosstalk effects without increasing the overall fiber cross-sectional area, preserving high core density while ensuring reliable signal transmission.
4Object-affected harmful factors
If a coupled multi-core optical fiber is used, then non-linear optical effects are reduced compared to non-coupled type, but crosstalk between cores is increased
Solution Approach 1:
The patent segments the coupled multi-core fiber system into independently amplified core channels, applying separate pumping light sources to each core. This segmentation maintains the low non-linear optical effect advantage of coupled fibers while compensating for increased crosstalk through individualized amplification control, achieving both reduced non-linear effects and manageable crosstalk levels.
Solution Approach 2:
The patent applies local quality by providing each core with locally optimized amplification parameters and independent pumping control. This approach preserves the beneficial reduced non-linear optical effects of coupled multi-core fibers while mitigating the harmful increased crosstalk through localized signal management and individual core optimization.
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
This approach enables the construction of an optical fiber transmission system with stable relay optical amplification using coupled multi-core optical fibers, reducing power consumption and maintaining performance comparable to single-core systems.
Implementation Method 1
converts a spatial layout of a plurality of optical signal beams propagating through each of a plurality of cores, from a coupled state in which optical signal beams interfere between a plurality of cores to a non-coupled state in which optical signal beam interference is reduced between a plurality of cores
Data Source
AI summary
It is difficult to construct an optical fiber transmission system enabling relay optical amplification using a coupled multi-core optical fiber as an optical transmission path; therefore, an optical amplification device includes first optical spatial layout converting means for converting a spatial layout of a plurality of optical signal beams propagating through each of a plurality of cores, from a coupled state in which optical signal beams interfere between a plurality of cores to a non-coupled state in which optical signal beam interference is reduced between a plurality of cores; optical amplifying means for amplifying, in the non-coupled state, the plurality of optical signal beams with the non-coupled state and generating a plurality of amplified optical signal beams; and second optical spatial layout converting means for converting a spatial layout of the plurality of amplified optical signal beams from the non-coupled state to the coupled state.