Optical Power Distribution Estimation Using Spatial Response Filtering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional digital signal processing techniques for optical power distribution estimation suffer from low spatial resolution and accuracy in optical power distribution estimation.
Innovation Solution
An optical power distribution estimation device and method that includes an optical power distribution estimation unit, a spatial response function calculation unit, and a digital filter application unit to estimate optical power distribution with high accuracy using digital signal processing, by calculating a spatial response function and applying a digital filter based on the dispersion value of the optical transmission line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If digital signal processing is used for optical power distribution estimation, then equipment cost and operating cost are reduced, but spatial resolution and estimation accuracy are low
Solution Approach 1:
The patent applies parameter changes by modifying the digital signal processing approach to include spatial response function calculation and digital filter application. These parameter changes transform the estimation process to achieve high spatial resolution (comparable to analog instruments) while maintaining the cost advantages of digital processing. The spatial response function incorporates dispersion values and transmission characteristics to enhance measurement precision without requiring expensive analog equipment.
Solution Approach 2:
The patent replaces the mechanical/analog measurement system with an enhanced digital signal processing system. Instead of using physical analog instruments like OTDR or optical spectrum analyzers, the invention substitutes a digital processing methodology that calculates spatial response functions and applies digital filters. This substitution achieves comparable or superior measurement accuracy while eliminating the need for expensive analog equipment and direct physical measurements at each optical node.
2Ease of operation
If digital signal processing is used for optical power distribution estimation, then simple measurement can be performed, but estimation accuracy is low
Solution Approach 1:
The patent transforms the simple but inaccurate digital signal processing into a precise estimation method by introducing parameter changes: calculating spatial response functions based on transmission signals and dispersion values, and applying digital filters to the optical power distribution. These parameter modifications maintain the ease of digital operation while achieving high estimation accuracy through enhanced signal processing algorithms.
3Measurement precision
If analog measuring instrument is used for direct measurement on each optical node, then measurement accuracy is high, but equipment cost and operating cost increase
Solution Approach 1:
The patent replaces expensive analog measuring instruments with a digital signal processing system that achieves comparable accuracy. Instead of deploying analog equipment like OTDR or optical spectrum analyzers to each optical node for direct measurement, the invention substitutes a centralized digital processing approach that calculates spatial response functions and applies digital filters to reception signals, thereby maintaining measurement accuracy while dramatically reducing equipment and operational costs.
Solution Approach 2:
The patent creates a virtual copy of the measurement capability through digital signal processing. Rather than physically measuring at each optical node with expensive analog instruments, the system processes reception signals through digital algorithms that replicate the measurement function. This digital copying approach achieves accurate optical power distribution estimation without requiring physical presence or expensive equipment at each measurement point.
Data Source
AI summary
An optical power distribution estimation device includes: an optical power distribution estimation unit that estimates an optical power distribution on the basis of a reception signal based on an optical signal transmitted from an optical transmission device and received via an optical transmission line and a transmission signal restored based on the reception signal; a spatial response function calculation unit that calculates a spatial response function on the basis of the transmission signal and a dispersion value of the optical transmission line; and a digital filter application unit that obtains an ideal output by applying a digital filter based on the spatial response function to the optical power distribution.