Optical Path Monitoring With Segmented Dispersion Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical transmission path monitoring devices face challenges in accurately estimating optical power near the transmission end due to reduced compensation effects from the third compensation unit, leading to inaccuracies in detecting abnormal losses.
Innovation Solution
The optical transmission path monitoring device employs a first compensation circuit for wavelength dispersion, a non-linear compensation circuit for non-linear optical effects, a second compensation circuit for additional wavelength dispersion, and an adjustment circuit to fine-tune compensation amounts, along with an estimation circuit to calculate optical power based on signal correlations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the third compensation unit compensates for remaining wavelength dispersion, then wavelength dispersion compensation is improved, but estimation accuracy of optical power near the transmission end deteriorates due to reduced compensation effects
Solution Approach 1:
The patent segments the wavelength dispersion compensation into three distinct compensation units with different compensation amounts. The first compensation unit compensates for a first amount, the second compensation unit compensates for a second amount (greater than the first), and the third compensation unit compensates for a third amount (less than the second). This segmentation allows the system to evaluate multiple compensation scenarios and select the most appropriate one for accurate optical power estimation near the transmission end.
Solution Approach 2:
The patent changes the compensation amount parameter across different compensation units. By varying the compensation amount (first amount < second amount, third amount < second amount), the system can optimize the compensation effect for different transmission conditions and positions, particularly improving estimation accuracy near the transmission end where conventional single-amount compensation fails.
2Device complexity
If a single compensation amount is used for wavelength dispersion, then device complexity is reduced, but estimation accuracy near the transmission end deteriorates
Solution Approach 1:
Instead of using a single compensation circuit, the patent divides the compensation function into three separate compensation units, each with its own compensation amount. This segmentation enables precise control over dispersion compensation at different stages, improving estimation accuracy while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent introduces dynamic adjustment of compensation amounts by using multiple compensation units with different compensation levels. The system can adaptively select or combine compensation amounts based on the transmission distance and position, making the compensation mechanism flexible and responsive to varying transmission conditions rather than fixed.
Data Source
AI summary
An optical transmission path monitoring device includes: a first compensation circuit that compensates for a part of wavelength dispersion of an optical transmission path with respect to an electric field signal indicating an optical electric field component of an optical signal; a non-linear compensation circuit that compensates for degradation of the optical transmission path; a second compensation circuit that compensates for remaining wavelength dispersion of the optical transmission path excluding the part of the wavelength dispersion, and compensates for wavelength dispersion at a virtual position; an adjustment circuit that adjusts a compensation amount; a third compensation circuit that compensates for the wavelength dispersion of the compensation amount; and an estimation circuit that estimates optical power based on a correlation of amplitude between a first signal output from the second compensation circuit and a second signal output from the third compensation circuit.