Fiber Optic Cable Identification via Vibration-Induced Polarization Shift
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Solution Overview
Problem
Network operators face challenges in accurately managing fiber optic cable infrastructure due to high error rates in cabling location databases, making it difficult to understand the physical layout and connectivity of fiber optic cables, which hinders risk management and redundancy establishment in optical networks.
Innovation Solution
The method involves inducing a predetermined vibration on fiber optic cables to cause changes in the state of polarization or phase of optical signals, which are detected at endpoints using coherent optical receivers, allowing network operators to determine connectivity and map the physical location of cables, thereby correlating DWDM wavelengths with fiber optic cables and identifying potential shared risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional database methods are used to store cabling location information, then the system is simple to operate, but the measurement precision and accuracy of cable location information deteriorates with error rates up to 20%
Solution Approach 1:
The patent replaces traditional mechanical/database-based cable location tracking with optical measurement methods. Coherent optical receivers measure the state of polarization and phase of optical signals to detect cable vibrations and determine cable routes, eliminating the need for manual surveying and database maintenance while achieving high measurement precision.
Solution Approach 2:
The patent introduces optical signals as an intermediary medium to transfer information about cable locations. By modulating optical signals with cable identification characteristics and detecting their state changes, the system enables indirect measurement of cable positions without direct physical contact or manual recording.
2Measurement precision
If accurate physical fiber optic cable information is collected through traditional methods, then cable location accuracy improves, but the time and resources required for surveying and mapping increase
Solution Approach 1:
The patent enables continuous and automated collection of cable location information through ongoing optical measurements. The system continuously monitors optical signal states along cable routes, providing real-time updates without requiring periodic manual resurveying, thus eliminating time loss while maintaining high accuracy.
Solution Approach 2:
The optical measurement system performs self-calibration and automatic data collection without human intervention. The coherent optical receivers automatically detect state of polarization and phase changes, process the data to identify cable routes, and update databases autonomously, eliminating the time-consuming manual surveying process.
3Reliability
If network operators rely on inaccurate cabling location databases, then operational simplicity is maintained, but risk management capability and redundancy establishment are compromised
Solution Approach 1:
The patent implements feedback mechanisms where optical measurements continuously monitor cable locations and provide real-time feedback to network management systems. This feedback loop enables dynamic updates of cable routing information, allowing operators to respond to changing conditions and maintain accurate inventory data without increasing operational complexity.
Solution Approach 2:
The optical measurement system serves multiple functions simultaneously: it measures cable locations, identifies cable routes, detects cable vibrations, and provides real-time status monitoring. This multi-functionality consolidates multiple management tasks into a single system, improving risk management capability without proportionally increasing complexity.
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
This approach provides accurate mapping of fiber optic cable infrastructure, enabling effective risk management and redundancy planning, reducing the likelihood of network failures by ensuring that redundant cables are physically distant and maintaining high availability of network connectivity.
Implementation Method 1
inducing a predetermined vibration on a fiber optic cable, the predetermined vibration being sufficient to cause a change to at least one of a state of polarization and a phase of optical signals being carried by optical fibers in the fiber optic cable
Implementation Method 2
inducing a predetermined vibration on a fiber optic cable, the predetermined vibration being sufficient to cause a change to at least one of a state of polarization and a phase of optical signals being carried by optical fibers in the fiber optic cable
Implementation Method 3
detecting, at a first endpoint, using a first coherent optical receiver, and at a second endpoint, using a second coherent optical receiver, the change to the at least one of the state of polarization and the phase of the optical signals
Data Source
AI summary
Presented herein are techniques to manage optical network infrastructure. A method includes inducing a predetermined vibration on a fiber optic cable, the predetermined vibration being sufficient to cause a change to at least one of a state of polarization and a phase of optical signals being carried by respective optical fibers in the fiber optic cable, detecting, at a first endpoint, using a first coherent optical receiver, and at a second endpoint, using a second coherent optical receiver, the change to the at least one of the state of polarization and the phase of the optical signals, and based on the detecting, determining that the first endpoint and the second endpoint are connected to, or in communication with, one another via at least one finer in the fiber optic cable.