Parallel LD Driving Circuits for Submarine Cable Power Efficiency
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Solution Overview
Problem
The current optical submarine cable systems face challenges in reducing excessive current consumption due to differing current requirements of LD driving circuits for C and L bands, leading to inefficiencies in power supply and increased energy waste.
Innovation Solution
The optical submarine cable system employs a configuration where power feeding lines for LD driving circuits are connected in parallel, allowing for efficient current distribution and reducing excessive current flow by ensuring that both C and L band circuits receive their necessary currents simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If power feeding lines for LD driving circuits are connected in series, then the system can supply power to multiple circuits, but excessive current consumption occurs due to differing current requirements of C and L band circuits
Solution Approach 1:
The patent segments the power supply configuration by dividing the LD driving circuits into separate parallel branches, each with its own power feeding line. This allows independent current control for C band and L band circuits, eliminating the excessive current consumption that occurs in series connections where the same current must flow through all circuits regardless of their individual requirements.
2Device complexity
If multiple LD driving circuits with different current requirements are connected in series, then power can be supplied to all circuits through a single line, but current utilization efficiency decreases
Solution Approach 1:
The patent implements a dynamic power supply configuration where each LD driving circuit receives power through independent parallel feeding lines. This dynamic structure allows the system to adapt current distribution to the specific requirements of each circuit (C band vs. L band), significantly improving current utilization efficiency compared to static series connections.
3Device complexity
If series connection is used for power feeding, then the system structure is simplified, but power supply efficiency deteriorates due to excessive current flow
Solution Approach 1:
The patent segments the power feeding structure into multiple parallel pathways, each dedicated to specific LD driving circuits with similar current requirements. This segmentation maintains structural organization while dramatically improving power supply efficiency by ensuring that each circuit receives the precise current it needs without forcing excessive current flow through the entire system.
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 efficient current utilization and reduces overall current requirements, preventing excessive current consumption and enhancing the reliability and capacity of long-distance communication systems.
Implementation Method 1
an LD driving device for excitation which outputs excitation light for excitation and driving for an optical amplifier
Implementation Method 2
an optical direct amplification technology using Erbium-Doped Fiber (EDF)
Data Source
AI summary
When, in each of optical submarine relay apparatuses of the optical submarine cable system in which the optical submarine relay apparatus is arranged in each relay section of an optical submarine cable, a Laser Diode (LD) driving device for excitation (11) for outputting an excitation light to excite an optical amplifier is configured to include a plurality of LD driving circuits whose requiring currents are different from one another, which are, for example, a first LD driving circuit (111a) of a required current Ia and a second LD driving circuit (111b) of a required current (Ib) therein, a power feeding line for feeing power to the first LD driving circuit (111a) and a power feeding line for feeing power to the second LD driving circuit (111b) are configured to be connected in parallel to each other.