Parallel O-Band Amplifier With Shared Pumps for Multi-Channel Gain
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Solution Overview
Problem
Conventional O-Band optical communication systems are impractical for supporting increasing data demands due to limitations in data capacity and transmission distance, as they require high optical power and suffer from signal loss, making them costly and power-intensive for high-capacity and long-distance communications.
Innovation Solution
A parallel O-Band amplifier system using Bismuth-doped optical fibers and shared pump sources to amplify optical signals across multiple channels, reducing cost, complexity, and power consumption while enabling efficient amplification of multiple O-Band transmission channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional O-Band networks use single wavelength point-to-point transmission, then system simplicity is maintained, but data capacity and transmission distance are limited
Solution Approach 1:
The patent divides the single transmission channel into multiple parallel optical channels (N channels) using wavelength division multiplexing. Each channel operates at a different wavelength within the O-Band, enabling simultaneous data transmission across multiple wavelengths. This segmentation of the transmission medium allows the system to achieve high data capacity (scaling with N) while maintaining the simplicity of point-to-point fiber optic infrastructure.
2Length of stationary object
If optical power is increased to extend transmission distance, then transmission distance is improved, but power consumption and cost increase
Solution Approach 1:
The patent introduces optical amplifiers at intermediate points along the transmission path as mediator devices. These amplifiers receive weakened optical signals from the transmitter, amplify them using pumped gain media (such as erbium-doped fiber or semiconductor optical amplifiers), and retransmit the amplified signals. This intermediary amplification approach extends transmission distance without requiring proportionally higher transmitter power, thereby reducing overall power consumption and cost compared to direct high-power transmission.
3Productivity
If multiple wavelengths are used for high-capacity transmission, then data capacity is improved, but signal loss and interference increase
Solution Approach 1:
The patent extracts and manages each wavelength channel independently through dedicated optical amplifiers tuned to specific wavelengths. Each amplifier is designed to amplify only its assigned wavelength band, preventing cross-channel interference. This selective extraction and independent amplification of each wavelength maintains signal quality and reliability while enabling high-capacity multi-wavelength transmission. The system effectively isolates each channel's signal processing to prevent harmful interactions between wavelengths.
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
The system achieves efficient amplification of multiple O-Band channels, increasing data capacity and extending transmission distances, reducing power consumption, and simplifying design by sharing components, making high-data-capacity and long-distance O-Band communication commercially viable.
Implementation Method 1
gain fibers (e.g., Bismuth-doped optical fiber) for amplifying optical signals
Implementation Method 2
The gain fibers are optically coupled to pump sources
Data Source
AI summary
A system (e.g., an optical amplifier) comprising gain fibers (e.g., Bismuth-doped optical fiber) for amplifying optical signals. The optical signals have an operating center wavelength (λ0) that is centered between approximately 1260 nanometers (˜1260 nm) and ˜1360 nm (which is in the O-Band). The gain fibers are optically coupled to pump sources, with the number of pump sources being less than or equal to the number of gain fibers. The pump sources are (optionally) shared among the gain fibers, thereby providing more efficient use of resources.