Optical Amplifier APR Protection via Link Interruption Detection
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Solution Overview
Problem
Conventional APR function implementations in optical communication systems are prone to misactivation and linkage activation due to the activation of optical amplifier units, leading to system management inconveniences and potential eye hazards from excessive optical power.
Innovation Solution
A method and device that utilize switch chips to detect link interruptions and conductions, activating or deactivating APR protection states in optical amplifier units based on reception states, and employing encoded pulse signals to prevent deadlock and misactivation, with a logic control module and OSC module for signal conversion and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical amplifier unit uses the conventional activation method with optical power detection and activation pulses, then the APR function can be activated to reduce optical power to safe levels, but the APR function may be misactivated or cause linkage activation in multi-stage systems
Solution Approach 1:
The invention divides the detection function into separate components: the switch chip detects link conduction status independently, while the optical power detection function remains separate. This segmentation prevents the activation pulse from triggering cascaded APR responses in multi-stage amplifier systems, as each stage's APR activation is controlled by its own switch chip's link status detection rather than by optical power pulses from other stages.
Solution Approach 2:
The switch chip acts as an intermediary between the link status and the APR activation control. Instead of directly using optical power detection to trigger APR, the system uses the switch chip's link conduction detection as the primary control signal, with optical power detection serving as a secondary verification condition. This intermediary control mechanism prevents misactivation while maintaining safety.
2Object-affected harmful factors
If the APR function is activated in one stage of a multi-stage OA unit system, then optical power is reduced to safe levels in that stage, but the activation pulse is transmitted to downstream stages causing linkage activation of APR functions
Solution Approach 1:
The invention segments the APR control authority to each individual amplifier stage by using local switch chips that detect local link conduction status. Each stage's APR activation is independently controlled by its own switch chip's detection of link interruptions, rather than being triggered by activation pulses from upstream stages. This eliminates the linkage activation problem while maintaining optical power safety at each stage.
Solution Approach 2:
The invention extracts the link conduction detection function from the optical power detection mechanism. By using the switch chip's link status detection as the primary control signal for APR activation, the system removes the problematic activation pulse transmission chain that caused cascaded APR responses in multi-stage systems, while still achieving the goal of reducing optical power to safe levels when needed.
Data Source
AI summary
Disclosed are an APR protection method and device, and a computer storage medium. A preamplifier PA of each of two optical amplifier units at two ends of a transmission line is connected to a booster amplifier BA of the other amplifier unit by an optical fiber. The method comprises: when a reception state of PA of at least one of two amplifier units is a loss of signal state and a switch chip of said amplifier unit detects a link interruption signal, activating an APR protection state of said amplifier unit which is to turn off BA output of said amplifier unit; when the switch chip of at least one of two amplifier units detects a link conduction signal, deactivating the APR protection state of the present amplifier unit to restore a state of BA of said amplifier unit to a state before the APR protection state is activated.