Optical Amplifier Tilt Control for C+L Band Transient Recovery
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Solution Overview
Problem
Conventional optical networks fail to rapidly recover from transient events, leading to delayed fault detection and increased bit error rates due to unaccounted signal losses in fiber optic cables, especially in C Band, L Band, and C+L Band networks.
Innovation Solution
The system selects and applies pre-calculated target tilt and gain settings stored in a computer-readable medium based on fault event messages to correct amplifier settings in real-time, enabling rapid recovery from faults in optical networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power control cycles are used to detect and respond to failures, then the system operates with standard control timing, but the failure detection and recovery is delayed by hundreds of seconds
Solution Approach 1:
The system pre-calculates and stores target tilt and gain settings for various fault scenarios in advance. When a fault event occurs, the controller immediately retrieves and applies the pre-computed settings corresponding to the detected fault type, eliminating the need for time-consuming real-time calculations and enabling rapid recovery without waiting for the next power control cycle
Solution Approach 2:
The system implements a feedback mechanism where fault event messages are detected and trigger immediate corrective actions. The controller continuously monitors for fault conditions, and upon detection, applies specific pre-determined tilt and gain adjustments to correct the spectral loading changes and restore signal quality, creating a closed-loop rapid response system
2Reliability
If the system waits for the next power control cycle to account for failures, then the control logic remains simple, but unaffected signals experience bit error rates exceeding thresholds due to uncorrected spectral loading changes
Solution Approach 1:
Target tilt and gain settings for multiple fault scenarios are pre-calculated and stored in memory before faults occur. When a fault is detected, the system simply retrieves the appropriate pre-computed settings and applies them, maintaining relatively simple control logic while achieving rapid signal quality recovery
Solution Approach 2:
The system changes amplifier parameters (tilt and gain settings) based on detected fault conditions. By pre-determining the appropriate parameter adjustments for various fault types and applying them immediately upon fault detection, the system restores signal quality without requiring complex real-time optimization algorithms
Data Source
AI summary
An optical device having an amplifier and a controller is described. The amplifier is configured to amplify an optical signal in at least one of the C-Band or the L-Band. The controller includes a processor and a non-transitory computer readable medium. The non-transitory computer readable medium storing computer executable code that when executed by the processor causes the processor to: select a target tilt and gain setting from a plurality of target tilt and gain settings stored in the non-transitory computer readable medium based on the type of fault event message responsive to a fault event message affecting the C-band or the L-Band. The selected and pre-calculated target tilt and gain settings are applied to the amplifier.