Optical Signal Shutoff via Bidirectional Coupler Feedback
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Solution Overview
Problem
Conventional optical power transport systems face radiation safety issues due to increased optical power levels, as they often shut off the laser or amplifier power unnecessarily and fail to detect early increases in reflection levels that interfere with the signal quality.
Innovation Solution
A bi-directional coupler and processing element system that converts reflected optical signals into trigger signals, allowing for controlled shut-off of the optical signal when reflection characteristics exceed a threshold, minimizing radiation exposure and maintaining signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional automatic laser shut-off features are used to avoid radiation exposure, then radiation safety is improved, but false shut-offs occur due to lossy elements or malfunctioning receivers causing unnecessary power shut-off
Solution Approach 1:
The patent implements a feedback mechanism where the optical supervisory channel (OSC) continuously monitors the optical path and provides feedback to the laser control. The OSC detects actual signal loss conditions and only triggers laser shut-off when genuine fiber breaks or connector failures are detected, preventing false shut-offs caused by transient losses or receiver malfunctions. This selective feedback approach distinguishes between harmful radiation exposure risks and benign signal quality variations.
2Object-affected harmful factors
If conventional shut-off devices are used, then radiation safety is improved, but early detection of increasing reflection levels that interfere with transmitted signal quality is not provided
Solution Approach 1:
The patent enhances the OSC to perform multiple functions simultaneously: it not only detects fiber breaks and connector failures for safety shut-off purposes but also continuously monitors reflection levels along the optical path. This multi-functional OSC provides early detection of increasing reflections that would interfere with transmitted signal quality, enabling preventive maintenance while maintaining radiation safety protection. The single OSC infrastructure serves both safety and signal quality monitoring roles.
3Productivity
If optical power levels are increased to 200-400 mW or approaching 1 W for higher capacity transmission, then transmission capacity is improved, but radiation safety risks increase due to cable breaks or uncoupled connectors exposing invisible infra-red radiation
Solution Approach 1:
The patent introduces the optical supervisory channel (OSC) as an intermediary monitoring system that operates alongside the high-power data transmission channels. The OSC continuously probes the optical path at safe power levels and detects conditions indicating radiation exposure risks (fiber breaks, uncoupled connectors). When the OSC detects such conditions, it triggers laser shut-off to eliminate the radiation hazard while allowing the system to maintain high transmission capacity during normal operation. This intermediary monitoring enables safe operation at high power levels.
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 system effectively reduces radiation exposure risks by automatically shutting off the optical signal in case of fiber breaks or connector issues and monitors reflection changes to prevent signal degradation, ensuring safer operation and higher signal quality.
Implementation Method 1
monitors reflection changes
Implementation Method 2
converts reflected optical signals into trigger signals
Data Source
AI summary
A mechanism for adjusting or shutting off an optical signal within a network system is provided. The system may include a generating element for providing an optical signal and a bi-directional coupler for transmitting the optical signal to downstream components and fiber links and for transmitting a reflected optical signal based on the reflection characteristics of the downstream components to a converter element. The converter element converts the reflected optical signal to an electrical trigger signal that is used by a processing element to monitor the degradation or operational conditions within the network system. Based on the electrical trigger signal the processing element may adjust or shut off the optical signal at the generating element or at another element within the network system or another network system. The processing element may also send a communication signal to other elements or an operator to indicate unacceptable noise within the network system.