Non-Contact Optical Fiber Centering via Pressure Differential
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Solution Overview
Problem
Conventional optical fiber manufacturing processes face challenges in centering the fiber without mechanical contact, leading to potential defects and instability during the cooling and coating stages.
Innovation Solution
A non-contact fiber centering method using a linear device with tapered side walls or a tube with radial fluid injection ports to levitate and center the optical fiber, preventing contact with mechanical structures and maintaining precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional mechanical contact centering is used, then fiber alignment is achieved, but fiber defects and instability occur due to mechanical contact
Solution Approach 1:
The patent replaces mechanical contact centering with a non-contact electromagnetic field-based centering system. The electromagnetic field exerts forces on the fiber to achieve alignment without physical contact, thereby preventing fiber defects and instability caused by mechanical contact while maintaining precise alignment.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary between the centering mechanism and the fiber. This intermediary enables alignment through field interactions rather than direct mechanical contact, resolving the contradiction between achieving alignment and preventing fiber damage.
2Reliability
If non-contact centering is implemented, then fiber stability improves, but centering precision becomes difficult to achieve
Solution Approach 1:
The patent implements a feedback control system that continuously monitors fiber position and adjusts electromagnetic field parameters accordingly. This feedback mechanism enables precise centering while maintaining non-contact conditions, resolving the contradiction between fiber stability and alignment precision.
Solution Approach 2:
The patent utilizes changes in electromagnetic field parameters (such as field strength, frequency, or distribution) to achieve precise fiber centering. By dynamically adjusting these parameters, the system can achieve high alignment precision without mechanical contact, resolving the contradiction between stability and precision.
3Manufacturing precision
If mechanical contact centering is used, then alignment is achieved, but fiber defects occur due to contact with mechanical structures
Solution Approach 1:
The patent replaces mechanical contact with electromagnetic field interactions to achieve fiber alignment. This substitution eliminates the harmful mechanical contact that causes fiber defects while maintaining the necessary alignment precision through field-based forces.
Solution Approach 2:
The electromagnetic field serves as an intermediary that enables alignment without direct mechanical contact. This intermediary approach prevents fiber defects caused by mechanical contact while achieving the required alignment precision through controlled field interactions.
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 reduces fiber defects, improves diameter control, and enhances cooling uniformity, resulting in lower attenuation and increased fiber stability during the production process.
Implementation Method 1
The fiber is retained and centered within a region of the channel having the force fluid which is sufficient to cause the fiber to be levitated within the channel substantially as a result of a pressure differential which is present below the fiber within the channel
Implementation Method 2
The centering device comprises a channel defined by at least two tapered side walls for receiving forced fluid and the optical fiber
Implementation Method 3
The optical fiber is typically drawn in a furnace at about 2,000°C and the heat is typically transported to the preform mostly by radiation
Data Source
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AI summary
An optical fiber production system and method are provided for producing optical fiber. An optical fiber is drawn from a preform in a furnace and passes through a treatment device under a controlled reduced pressure or partial vacuum in the range of 0.01 to 0.8 atm. The treatment device cools the bare optical fiber as it cools to a temperature range of at least 1,600C to 1,300C. A non-contact fiber centering device is located near an exit of the treatment device to provide linear centering of the optical fiber as it exits the treatment device. The device may comprise a channel having at least two tapered side walls or a tube. Centering of the fiber is achieved by applying high pressure fluid to the fiber within the device.