Distributed Optical Fiber Loss Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical network systems face power fluctuations due to reactive gain adjustments in amplifiers, which are designed to compensate only for upstream fiber span losses, leading to unwanted power fluctuations throughout the network.
Innovation Solution
The compensation process is distributed across multiple amplifier stages, with each stage compensating for a portion of the total loss and communicating any shortfall to downstream controllers, allowing for gradual power level maintenance without large amplification swings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a controller compensates for the entire power loss at one amplifier stage, then the compensation is complete, but large transient power fluctuations occur throughout the network
Solution Approach 1:
The patent segments the compensation task by distributing it across multiple amplifier stages. Each amplifier compensates for only a portion of the total power loss rather than one amplifier attempting to compensate for the entire loss. This is achieved by having each amplifier measure its own upstream fiber span loss and compensate accordingly, while passing remaining compensation needs downstream. This segmentation resolves the contradiction by maintaining compensation effectiveness while reducing transient power fluctuations.
2Productivity
If controllers constantly adjust gain reactively to compensate for power loss changes, then compensation responsiveness is improved, but unwanted power fluctuations are generated
Solution Approach 1:
The patent implements preliminary action by having each amplifier proactively compensate for its measured upstream fiber span loss rather than reactively responding to power drops. Each amplifier continuously monitors its upstream span and adjusts its gain to pre-compensate for losses, preventing power fluctuations before they propagate downstream. This approach maintains responsiveness to actual loss conditions while avoiding the destabilizing effects of reactive compensation.
Data Source
AI summary
Systems and methods for measuring accumulated power losses over a fiber link are described in the present disclosure. According to one embodiment, a method includes the step of measuring accumulated losses over a fiber link. The method also includes the step of at least partially compensating for the measured accumulated losses. In response to determining that there is a compensation shortfall with respect to the accumulated losses, the method includes the step of transmitting the compensation shortfall to one or more downstream controllers.