Dynamic Brillouin Spectrum Analysis for Optical Fiber Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
BOCDR optical fiber characteristic measurement devices require a longer measurement time as the number of measurement points increases, making it challenging to achieve high spatial resolution or a wide temperature/strain measurement range without degrading precision.
Innovation Solution
The device employs a spectrum analysis unit that predicts peak frequencies using a learning model and dynamically adjusts the frequency range to focus on the Brillouin gain spectrum's necessary range, reducing the number of measurement points and measurement time by narrowing the spectrum acquisition range based on peak frequency analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of measurement points is increased to achieve high spatial resolution or wide measurement dynamic range, then measurement precision is improved, but measurement time becomes longer
Solution Approach 1:
The patent changes the frequency range parameter dynamically based on the detected Brillouin frequency shift. By adjusting the frequency range to track the peak frequency, the system maintains high measurement precision while reducing the number of measurement points needed, thereby shortening measurement time without sacrificing accuracy
Solution Approach 2:
The patent implements dynamic adjustment of the frequency range based on real-time detection results. The frequency range is modified according to the detected Brillouin frequency shift, allowing the measurement system to adapt to changing conditions and maintain precision while reducing overall measurement time through targeted frequency sweeping
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 allows for faster measurement of optical fiber characteristics without increasing the number of measurement points, maintaining precision and enabling dynamic range expansion.
Implementation Method 1
detects scattered light or reflected light arising in the optical fiber under test... detects Brillouin scattered light (LS) obtained by causing pump light (LP) to be incident on optical fiber under test (FUT)
Data Source
AI summary
An optical fiber characteristic measurement device includes: a detector that detects Brillouin scattered light obtained by causing light to be incident on an optical fiber under test; a spectrum analyzer that obtains a Brillouin gain spectrum from the Brillouin scattered light; and a spectrum analyzing controller that: measures a characteristic of the optical fiber under test by analyzing the Brillouin gain spectrum to obtain a peak frequency of the Brillouin gain spectrum, and changes a frequency range used by the spectrum analyzer to obtain the Brillouin gain spectrum according to the peak frequency.