Multicore Fiber Amplifier Power Efficiency
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Solution Overview
Problem
Existing optical communication systems, particularly submarine cable systems, face challenges in increasing data transmission capacity and power efficiency due to limitations in the number of amplifiers that can be physically enclosed in repeaters and electrical power constraints, as well as wavelength-dependent attenuation and limited bandwidth in single-core erbium-doped fiber amplifiers.
Innovation Solution
The development of a multicore fiber amplifier system that includes a multicore input signal fiber, a 3D waveguide, and a multicore rare-earth doped fiber section, utilizing a multicore laser diode to combine optical signals with pump light for amplification, which enhances power efficiency and reduces system complexity while maintaining low noise performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-core erbium-doped fiber amplifiers are used, then the amplifier structure is simple, but the power efficiency is limited and data transmission capacity is constrained
Solution Approach 1:
The invention divides the amplifier into multiple independent cores within a single fiber structure. Each core can independently amplify optical signals, effectively segmenting the amplification function across multiple channels. This allows the system to handle multiple wavelength divisions simultaneously, increasing overall data transmission capacity while maintaining a compact single-fiber structure.
Solution Approach 2:
The invention transitions from single-core to multi-core fiber architecture, adding a spatial dimension to signal transmission. By utilizing multiple cores within the same fiber bundle, the system expands the transmission capacity in the spatial domain while maintaining the physical compactness of a single fiber structure, effectively resolving the contradiction between structural simplicity and transmission capacity.
2Productivity
If more amplifiers are deployed to increase data transmission capacity, then the bandwidth and capacity improve, but the power consumption increases and physical space requirements grow
Solution Approach 1:
The invention merges multiple amplification functions into a single multi-core fiber amplifier unit. By combining multiple cores within one fiber structure, the system achieves the capacity of multiple separate amplifiers while consuming less power and occupying less physical space. The shared pump laser and integrated structure reduce overall power consumption compared to deploying multiple independent amplifiers.
Solution Approach 2:
The multi-core fiber amplifier structure provides multi-functionality by enabling simultaneous amplification across multiple cores and wavelength divisions. A single amplifier unit performs the work of multiple traditional amplifiers, supporting high-capacity data transmission across numerous channels while maintaining reduced power consumption and compact form factor.
3Device complexity
If traditional single-core amplifiers are used, then the system complexity is low, but the wavelength-dependent attenuation and limited bandwidth restrict transmission performance
Solution Approach 1:
The invention segments the optical signal transmission into multiple wavelength divisions across multiple cores. Each core can be optimized for specific wavelength ranges, reducing the impact of wavelength-dependent attenuation. This segmentation allows simultaneous operation across multiple bands (C-band, L-band, S-band), expanding the effective bandwidth and improving transmission reliability without significantly increasing system complexity.
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 solution increases the data transmission capacity of undersea cables by improving power efficiency and reducing the cost per bit, allowing for more efficient data transmission over longer distances with reduced power consumption and maintaining high beam quality.
Implementation Method 1
optical signals input via the multicore input signal fiber are combined with pump light emitted from the multicore laser diode and amplified in the rare-earth doped fiber section
Data Source
AI summary
Aspects of the present disclosure describe systems, methods, and structures that advantageously amplify optical signals through the effect of optical pump signals generated by a multicore laser diode and multicore rare-earth doped optical fiber in optical communication with a 3D waveguide structure and a multicore input signal fiber providing a plurality of optical signals for amplification.