Multi-Core Fiber Power Coupling Measurement via Backscattered Light
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Solution Overview
Problem
Existing methods for measuring power coupling coefficients in multi-core fibers are expensive or require complex procedures due to the need for multiple light receivers or sequential measurements.
Innovation Solution
A method and device that calculate the power coupling coefficient from the intensity of backscattered light from a single core, using a single measurement device to input a test light pulse, measure the backscattered light intensity distribution, and calculate the coefficient through logarithmic representation and normalization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two light receivers are used to simultaneously acquire backscattered light from two cores, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the measurement of backscattered light from multiple cores into a single measurement process using one light receiver. By measuring the total backscattered light intensity and using mathematical models to deconvolute the contributions from different cores, the system achieves multi-core measurement capability without requiring separate receivers for each core, thus reducing device complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces a mathematical model as an intermediary to relate the measured backscattered light intensity to the power coupling coefficients. This model acts as a mediator that translates the single measurement into multiple useful parameters, allowing the system to extract power coupling coefficient information without direct simultaneous measurement of all cores.
2Device complexity
If two measurements are made sequentially to acquire backscattered light from two cores, then device complexity is reduced, but measurement time increases
Solution Approach 1:
The patent performs preliminary mathematical processing on the measured backscattered light intensity data to extract power coupling coefficient information. By pre-processing the measurement data through mathematical models and deconvolution techniques, the system can obtain multiple measurement results from a single measurement process, effectively reducing the time required compared to sequential measurements.
3Device complexity
If backscattered light intensity is measured from a single core, then device complexity and cost are reduced, but measurement precision may be compromised
Solution Approach 1:
The patent replaces the mechanical approach of using multiple physical light receivers with a mathematical approach. Instead of physically measuring each core separately or simultaneously with multiple receivers, the system uses mathematical models and signal processing to extract power coupling coefficients from single-core measurements, substituting physical complexity with computational methods.
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 inexpensive and easy measurement of power coupling coefficients in multi-core fibers, reducing the need for multiple receivers and simplifying the measurement process.
Implementation Method 1
receiving backscattered light of the core to which the test light pulse has been input or any one of the other cores
Data Source
AI summary
An object of the present disclosure is to provide a power coupling coefficient measurement method and a power coupling coefficient measurement device capable of inexpensively and easily measuring a power coupling coefficient. The power coupling coefficient measurement method according to the present disclosure is a power coupling coefficient measurement method for measuring a power coupling coefficient of a multi-core fiber in order to achieve the aforementioned object, and includes: inputting a test light pulse from one end of the multi-core fiber to any one of cores; receiving backscattered light of the core to which the test light pulse is input or any one of the other cores; measuring an intensity distribution of the backscattered light with respect to a distance from the one end of the multi-core fiber; and calculating the power coupling coefficient from the intensity distribution of the backscattered light.