Optical Amplifier Shutdown Speed Control for Transient Suppression
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Solution Overview
Problem
In optical amplifiers used in metro-access networks, the shutdown control speed of upstream amplifiers often differs from the output control speed of downstream amplifiers, leading to transient level variations in signal light output, and existing technologies struggle to differentiate between shutdowns caused by input interruptions and those from other factors, posing challenges in managing shutdown speeds effectively.
Innovation Solution
An optical amplifier circuit with a first monitor to detect input signal light presence and a control circuit that adjusts shutdown control speed based on the presence or absence of input signal light, allowing for differentiated shutdown control speeds for input interruptions and other factors, thereby reducing transient level variations and ensuring safe shutdowns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the shutdown control speed of the upstream optical amplifier is increased to ensure immediate shutdown for safety, then human safety is protected, but transient level variations occur in the Add signal light output from the downstream optical amplifier
Solution Approach 1:
The patent applies dynamics by making the shutdown control speed adjustable based on the shutdown cause. The system dynamically switches between a first shutdown control speed (faster) for input interruptions and a second shutdown control speed (slower) for other factors, allowing optimal performance for each scenario rather than using a fixed speed
Solution Approach 2:
The patent applies local quality by differentiating the shutdown control parameters based on the specific shutdown cause. Different local conditions (input interruption vs. other factors) receive different shutdown control speeds, with the control circuit selectively applying appropriate control parameters to match the specific situation
2Stability of the object's composition
If the shutdown control speed is slowed down to prevent transient level variations in downstream signal, then signal stability is maintained, but the response time for safety-critical shutdowns is delayed
Solution Approach 1:
The system dynamically adjusts the shutdown control speed based on the detected shutdown cause. When an input interruption is detected, the system uses a faster shutdown control speed to minimize response time. When other factors cause shutdown, a slower speed is used to maintain signal stability, thus optimizing both time and stability parameters for different scenarios
Solution Approach 2:
The patent changes the shutdown control parameter (speed) based on the shutdown cause. The control circuit selects between different control parameters corresponding to different shutdown scenarios, effectively using parameter changes to resolve the contradiction between response time and signal stability
3Device complexity
If a single shutdown control speed is used for all shutdown scenarios, then the control system is simple, but it cannot simultaneously ensure immediate shutdown for safety and prevent transient variations
Solution Approach 1:
The patent segments the shutdown control into different modes based on the shutdown cause. The control circuit is configured to selectively apply different control parameters (first control parameter for input interruptions, second control parameter for other factors), dividing the control strategy into distinct segments that can be independently optimized
Solution Approach 2:
The control circuit maintains universality by handling multiple shutdown scenarios with a single integrated control mechanism. The same control circuit selectively applies different control parameters based on the detected shutdown cause, providing multi-functional capability without requiring separate control systems for each scenario
Data Source
AI summary
An optical amplifier of the present invention includes: an optical amplifier circuit that amplifies input signal light and outputs the amplified light as output signal light; a first monitor for monitoring the presence or absence of the input signal light; and a control circuit that, when receiving a shutdown control signal, controls the optical amplifier circuit such that a shutdown control speed for reducing a level of the output signal light to zero differs according to the presence or absence of the input signal light.