Multi-Frequency Tap for PON Loss Testing
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Solution Overview
Problem
Current test apparatus for passive optical networks are often expensive, complex, and require careful reference measurements, making it difficult and time-consuming to identify and correct communication system failures, which can involve multiple possible faults in sending, receiving apparatus, transmission media, or communication protocols.
Innovation Solution
A multi-frequency tap apparatus that extracts optical test signals at different wavelengths (1310 nm, 1490 nm, and 1550 nm) with a wavelength-independent power measurement device, allowing for simultaneous measurement of optical test signals without impeding communication, and includes a network interface controller for packet-based communication testing, enabling comprehensive testing of optical fiber attenuation and communication system functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional test apparatus are used to test optical fibers, then measurement precision can be achieved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts only the necessary test functions from complex traditional test apparatus. By using a simple optical tap to extract a portion of the optical signal for measurement while allowing the main signal to pass through unchanged, the system achieves accurate measurements without requiring complex test equipment that would disrupt normal communication.
Solution Approach 2:
The patent introduces an optical tap as an intermediary device that mediates between the communication signal and the measurement device. The tap extracts a small portion of the optical power to feed measurement devices while allowing the majority of the signal to continue unchanged, enabling accurate measurements without complex apparatus disruption.
2Reliability
If comprehensive fault testing is performed to identify all possible failures, then reliability of fault detection improves, but loss of time increases due to multiple test requirements
Solution Approach 1:
The patent creates a universal test system that can perform multiple fault detection functions simultaneously. By measuring optical power at multiple wavelengths (1310nm, 1490nm, 1550nm) and directions using the same tap apparatus, the system can identify various fault types (fiber breaks, connector issues, component failures) in a single integrated test rather than requiring separate specialized tests.
Solution Approach 2:
The patent enables continuous monitoring of optical signals during normal communication operation. The optical tap allows simultaneous measurement of communication signals without interrupting the flow, enabling real-time fault detection and continuous system monitoring rather than requiring sequential testing that stops communication.
3Measurement precision
If optical test signals are extracted for measurement, then measurement precision improves, but communication signal strength may be reduced
Solution Approach 1:
The patent applies partial action by extracting only a small portion of the optical signal power for measurement purposes. The optical tap is designed to extract sufficient power to enable accurate measurements by measurement devices while leaving the majority of the signal power intact for normal communication, thus achieving measurement precision without significant communication signal loss.
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 solution provides an inexpensive, efficient, and simple method for identifying faults in communication systems by allowing simultaneous measurement of optical test signals across multiple frequencies and performing comprehensive packet-based communication tests, reducing the time and cost associated with troubleshooting and maintenance.
Implementation Method 1
a tap that extracts an optical test signal from a communication signal
Implementation Method 2
a wavelength independent power measurement device for measuring the optical test signals
Data Source
AI summary
An apparatus and methods for testing a passive optical network with regard to fiber connectivity and attenuation losses, and with regard to the proper operation of packet-based communication protocols thereon.