Optical Amplifier Automatic Restoration Without OSC
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Solution Overview
Problem
Existing optical communication systems face safety risks due to high optical signal power levels, particularly with the use of lasers in wavelengths beyond visible light, which can cause eye damage, and current automatic restoration methods are inadequate, especially when using RAMAN amplifiers, and often require an Optical Monitoring Channel (OSC) for safe operation.
Innovation Solution
A method and optical amplifier for automatic restoration in optical communication systems that allows for safe power reduction and link restoration between adjacent amplifier stations without the need for an OSC, using a control module to generate and control pump current for carrying identification signals, ensuring safe operation and reducing the risk of laser leakage during the restoration process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high optical signal power is used in optical communication systems, then transmission distance and signal quality are improved, but safety risks to operators and maintenance personnel increase
Solution Approach 1:
The system performs preliminary safety verification by sending detection messages with safe optical power levels before restoring high power transmission. This preliminary action ensures the fiber link is intact and safe to use before high-power lasers are activated, preventing accidental exposure while maintaining transmission quality.
Solution Approach 2:
An intermediary detection message mechanism is introduced between the failed state and full restoration. The detection messages act as intermediaries that carry safety verification information, allowing the system to confirm link integrity before resuming high-power operation, thus mediating between safety concerns and transmission requirements.
2Productivity
If automatic restoration is implemented quickly after fiber repair, then system availability is improved, but safety verification time may be insufficient
Solution Approach 1:
The system uses periodic detection messages sent at regular intervals to verify link safety during the restoration process. This periodic verification continues until confidence is established that the fiber is safe, balancing quick restoration with adequate safety checking through repeated measurements.
Solution Approach 2:
The system performs self-verification by automatically sending and processing detection messages without requiring external manual safety checks. This self-service mechanism enables rapid automated safety verification that keeps up with the fast restoration timeline while maintaining reliability.
3Reliability
If detection messages are sent with high optical power to ensure detectability, then detection reliability is improved, but safety risks during detection increase
Solution Approach 1:
The system changes the optical power parameter of detection messages to a safe level that is detectable but does not pose safety risks. By adjusting this parameter, the system maintains detection reliability while eliminating the safety hazard associated with high-power detection signals.
4Object-affected harmful factors
If manual safety verification procedures are implemented before restoration, then safety is improved, but restoration time increases
Solution Approach 1:
The system replaces manual mechanical safety verification procedures with automated optical detection message exchange. This substitution eliminates the need for operators to physically verify fiber safety, automating the process to both improve safety consistency and reduce the time required for verification.
Solution Approach 2:
The system performs self-verification through automated detection messages exchanged between network elements, eliminating the need for external manual safety checks. This self-service approach maintains comprehensive safety verification while dramatically reducing restoration time by removing human intervention from the verification process.
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 solution enables reliable and safe automatic restoration of optical communication links by reducing the risk of laser leakage and power-related safety hazards, allowing for faster restoration times and operation without the need for an OSC, thus enhancing the safety and efficiency of the communication system.
Implementation Method 1
a pump laser component for providing a pump light for the gain component
Implementation Method 2
a gain component for amplifying am inputted optical signal before outputting the optical signal
Data Source
AI summary
Methods and apparatuses for automatic restoration detection and automatic restoration of optical communication system are disclosed. In the methods, a first station sends an automatic restoration detection message to a second station at the opposite side of a failed link; in response to receiving an automatic restoration request message, determines that the link has been repaired in two directions, and sends an automatic restoration confirmation message to the second station; or in response to receiving the automatic restoration detection message, determines that the link from the second station to the first station has been repaired, and sends the automatic restoration request message to the second station; in response to receiving the automatic restoration confirmation message, determines that the link has been repaired in two directions; and switching to normal working states. The safety problem that the laser leakage occurs in the failed link is solved.