Optical Fiber Transmission System Passive Identification
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Solution Overview
Problem
Current optical fiber transmission systems lack a method for remote passive identification of add/drop filters, leading to errors during installation and loss of inventory information, as they rely on manual documentation and require electrical power, which is not available in many passive optical networks.
Innovation Solution
An optical fiber transmission system that uses a tunable identification transceiver to generate an optical identification signal outside the data transmission range, with passive optical identification filter units copackaged with add/drop filters to identify component types and locations, allowing remote detection and inventory management without electrical power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual documentation and inventory records are used to track filter locations, then no additional hardware is required, but errors during installation occur and inventory information is lost
Solution Approach 1:
The patent uses optical copies (light signals) to encode and transmit filter identification information through the optical fiber network. Instead of manual documentation, the system creates optical representations of filter identities that can be remotely read, ensuring accurate inventory tracking without physical contact or power requirements at the filter location
Solution Approach 2:
The patent introduces an intermediary optical identification signal that mediates between the passive filter and the remote monitoring system. This optical intermediary carries identification information through the existing optical fiber infrastructure, enabling reliable inventory tracking without requiring direct electrical connections or manual intervention
2Loss of information
If dedicated communication channels with ID chips are used to identify filters, then inventory information can be retrieved, but electrical power must be available at filter locations
Solution Approach 1:
The passive optical filter performs self-identification by reflecting or modulating the identification wavelength in a manner characteristic of its type. The filter itself provides the identification information passively without requiring external power, electronics, or active components at the remote location
Solution Approach 2:
The patent replaces electrical/electronic identification systems with an optical identification mechanism. Instead of using powered ID chips and electrical communication channels, the system uses optical wavelengths and passive optical filtering to transmit identification information, eliminating the need for electrical power at remote filter locations
3Measurement precision
If network operators visit remote nodes to check filter inventory, then accurate information can be obtained, but the process is time-consuming and cumbersome
Solution Approach 1:
The system performs preliminary identification by having each filter type associated with a specific optical identification wavelength that is continuously available on the network. When an identification query is sent, the appropriate filter automatically responds with its identification wavelength, providing immediate remote identification without requiring physical presence or time-consuming manual checks
Solution Approach 2:
The patent implements a feedback mechanism where the passive optical filter responds to an identification query by returning its identification wavelength. This automatic feedback loop enables remote systems to obtain accurate filter location and type information instantly, eliminating the need for manual inventory checks and reducing time losses
4Productivity
If identification signals are transmitted during data transmission, then continuous monitoring is possible, but interference with data signals may occur
Solution Approach 1:
The patent segments the optical spectrum by assigning different wavelength ranges to different functions: data transmission wavelengths for communication and identification wavelengths for filter identification. This spectral segmentation allows simultaneous operation of data transmission and identification functions without mutual interference
Solution Approach 2:
The patent transitions from time-domain multiplexing to wavelength-domain multiplexing for identification signals. By using a different dimensional space (wavelength spectrum) rather than time slots, the system enables continuous identification capability without interfering with ongoing data transmission, achieving both high productivity and minimal interference
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
Enables remote and accurate identification of add/drop filter types and locations, reducing installation errors and enabling automated inventory management within passive optical networks.
Implementation Method 1
each passive optical identification filter unit being adapted to identify a filter type of the respective channel add/drop filter component
Data Source
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AI summary
An optical fiber transmission system adapted to provide a remote passive identification of components deployed in said transmission system, wherein each component comprises an associated passive optical identification unit adapted to provide identification of a component type of the respective component on the basis of a received optical identification signature carried in an optical identification signal to said component.