Multi-mode Optical Fiber Peak Wavelength Control
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Solution Overview
Problem
Conventional multi-mode optical fiber manufacturing processes often fail to consistently produce fibers that meet desired performance characteristics, such as bandwidth at a specific wavelength, leading to subpar quality and increased waste.
Innovation Solution
The method involves measuring the actual peak wavelength of the multi-mode optical fiber and adjusting drawing process parameters, like tension, to minimize the difference between the target and actual peak wavelengths, thereby enhancing the fiber's performance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fiber manufacturing processes are used, then production speed is maintained, but manufacturing precision of peak wavelength is poor
Solution Approach 1:
The patent measures the actual peak wavelength of drawn fiber during the drawing process and uses this information to adjust process parameters in real-time, ensuring the fiber meets specifications without requiring post-production sorting or rework
Solution Approach 2:
The patent implements a feedback control system where the actual peak wavelength measurement is fed back to adjust drawing parameters such as tension and furnace temperature, creating a closed-loop control system that continuously improves manufacturing precision while maintaining production speed
2Manufacturing precision
If drawing tension is increased to improve peak wavelength control, then manufacturing precision improves, but fiber breakage increases
Solution Approach 1:
The patent dynamically adjusts drawing tension based on real-time measurements of actual peak wavelength, allowing the tension to vary within optimal ranges during different phases of the drawing process rather than maintaining a fixed high tension throughout, thereby preventing fiber breakage while achieving wavelength control
Solution Approach 2:
The patent changes multiple process parameters including drawing tension, furnace temperature, and drawing speed in a coordinated manner based on the measured peak wavelength, allowing the system to achieve wavelength control through parameter optimization rather than relying solely on increased tension that would cause breakage
3Manufacturing precision
If real-time measurement and adjustment is implemented, then manufacturing precision of peak wavelength improves, but device complexity increases
Solution Approach 1:
The patent uses the drawn fiber itself as the measurement medium, where the fiber's own optical characteristics (peak wavelength) are measured during the drawing process, eliminating the need for separate test samples or complex measurement apparatus and allowing the system to self-adjust based on its own output
Data Source
AI summary
Methods for modifying multi-mode optical fiber manufacturing processes are disclosed. In one embodiment, a method for modifying a process for manufacturing multi-mode optical fiber includes measuring at least one characteristic of a multi-mode optical fiber. The at least one characteristic is a modal bandwidth or a differential mode delay at one or more wavelengths. The method further includes determining a measured peak wavelength of the multi-mode optical fiber based on the measured characteristic, determining a difference between the target peak wavelength and the measured peak wavelength, and modifying the process for manufacturing multi-mode optical fiber based on the difference between the target peak wavelength and the measured peak wavelength.