Multi-Core Optical Fiber Layout for Power Feeding and Communication
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Solution Overview
Problem
Existing optical communication systems using power feeding light face limitations such as increased system complexity, cost, restricted optical power feeding, and degraded communication speed or wavelength characteristics due to the use of multiple optical fibers or complex fiber structures.
Innovation Solution
Utilizing a multi-core optical fiber to transmit power feeding and communication light in different cores, allowing bidirectional communication with one optical fiber, thereby alleviating restrictions on optical power feeding and preventing deterioration of communication wavelength characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two optical fibers are used for power feeding and communication, then optical power feeding and bidirectional communication can be performed, but the system configuration becomes complicated and cost increases
Solution Approach 1:
The patent combines power feeding light transmission and communication light transmission into a single optical fiber by using multiple cores within that fiber. Specifically, first power feeding light is transmitted through a first core, second power feeding light is transmitted through a second core, and communication light is transmitted through a third core, thereby eliminating the need for separate optical fibers and reducing system complexity while maintaining both power feeding and communication capabilities
2Power
If a single mode optical fiber is used for power feeding, then the fiber can transmit power, but the amount of optical power feeding is limited due to optical nonlinear effect
Solution Approach 1:
The patent segments the power feeding function across multiple cores within the optical fiber. By transmitting first power feeding light through a first core and second power feeding light through a second core, the total power feeding capacity is distributed across multiple transmission paths, thereby increasing the overall amount of optical power that can be fed without exceeding the nonlinear effect limits of a single core
3Power
If a multimode optical fiber is used for power feeding, then higher optical power can be transmitted, but communication speed and transmission distance are limited due to characteristic degradation
Solution Approach 1:
The patent applies different transmission modes to different cores based on their specific functions. Power feeding cores utilize multimode transmission capabilities to transmit high optical power, while the communication core maintains single mode transmission characteristics to preserve communication speed and transmission distance. This local differentiation of transmission qualities allows each function to operate at its optimal performance level
4Device complexity
If power feeding light and communication light are multiplexed in one optical fiber, then system complexity is reduced, but communication wavelength characteristics are degraded due to Raman scattering
Solution Approach 1:
The patent segments the light transmission into separate cores within the optical fiber. Power feeding light is transmitted through first and second cores while communication light is transmitted through a third core. This spatial segmentation eliminates cross-core interference and Raman scattering effects between power and communication wavelengths, allowing both functions to coexist without degrading each other's performance
Data Source
AI summary
The present disclosure is a system including a multi-core optical fiber that connects a plurality of devices, in which communication light is transmitted by using at least one core of a plurality of cores included in the multi-core optical fiber, power feeding light is transmitted by using at least one core of the plurality of cores included in the multi-core optical fiber, the core that transmits the power feeding light and the core that transmits the communication light, in the multi-core optical fiber, are different, and the multi-core optical fiber transmits the communication light and the power feeding light in a single mode or a pseudo single mode.