Repeater Pump Light Power Control for WDM Signal Quality
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Solution Overview
Problem
Submarine optical communication systems require flexible control of pump light power to maintain peak power for wavelength division multiplexed optical signals, especially when the number of wavelengths or wavelength band changes, which existing repeaters struggle to achieve effectively.
Innovation Solution
A repeater system with pump light supplying means, multiplexing units, and control means that generate and control pump light power based on wavelength information of the optical signals, allowing flexible adjustment of pump light power for each wavelength division multiplexed optical signal transmitted through the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pump light power is increased to maintain peak power for each carrier, then signal quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic control of pump light power by the control unit based on detected wavelength information. The pump light power is adjusted in real-time according to the actual wavelength division multiplexed optical signal characteristics, transitioning from static fixed power to dynamic adaptive power control, thereby optimizing both signal quality and power consumption.
Solution Approach 2:
The control unit changes the power parameter of pump light based on wavelength information about the optical signal. By adjusting pump light power according to the number of wavelengths and wavelength band, the system optimizes the balance between signal quality maintenance and power consumption reduction.
2Adaptability or versatility
If the system is designed to handle multiple wavelength configurations, then adaptability is improved, but device complexity increases
Solution Approach 1:
The repeater is designed with universal functionality to handle multiple wavelength division multiplexed optical signal configurations. The control unit detects wavelength information and automatically adjusts pump light power to accommodate different numbers of wavelengths and wavelength bands, making the system adaptable to various communication scenarios without requiring multiple specialized devices.
Solution Approach 2:
The control unit detects wavelength information about the wavelength division multiplexed optical signal and uses this feedback to automatically adjust pump light power. This closed-loop feedback mechanism enables the system to adapt to changing wavelength configurations dynamically, reducing the need for manual intervention and simplifying system operation despite increased adaptability.
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
Enables flexible and precise control of pump light power, ensuring consistent peak power for each carrier in the optical signals, even with changes in the number of wavelengths or wavelength band, thereby enhancing the reliability and efficiency of submarine optical communication systems.
Implementation Method 1
an erbium-doped fiber (EDF) 906 being an amplification medium, and a multiplexing unit 907. The multiplexing unit 907 multiplexes a transmitted optical signal (for example, a wavelength division multiplexed optical signal) and pump light output from the pump LD 905. The pump light multiplexed with the optical signal in the multiplexing unit 907 pumps the EDF 906.
Data Source
AI summary
A repeater includes a pump light supplier configured to generate pump light; a first multiplexer configured to multiplex the pump light and a first wavelength division multiplexed optical signal; a second multiplexer configured to multiplex the pump light and a second wavelength division multiplexed optical signal; a first amplifier configured to amplify the first wavelength division multiplexed optical signal by use of the pump light; a second amplifier configured to amplify the second wavelength division multiplexed optical signal by use of the pump light; and a controller configured to control power of the pump light output to the first multiplexer and the second multiplexer, based on wavelength information about at least one of the first wavelength division multiplexed optical signal and the second wavelength division multiplexed optical signal.