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High-speed noncontact fiber-diameter measurement using forward light scattering.
Applied Optics
|February 20, 2010
Summary
An electrooptic system measures optical fiber diameter in real-time using light scattering. This instrument precisely monitors fiber diameter during manufacturing, ensuring quality control.
Area of Science:
- Optics and Photonics
- Materials Science and Engineering
Background:
- Optical fiber diameter is critical for performance.
- Real-time measurement during fiber drawing is challenging.
- Existing methods lack precision or in-line capability.
Purpose of the Study:
- To develop an electrooptic instrument for real-time optical fiber diameter measurement.
- To achieve high precision and accuracy during the fiber drawing process.
- To enable automated feedback control for diameter consistency.
Main Methods:
- Utilizing the forward scattering of light by optical fibers to generate interference fringe patterns.
- Developing an electrooptic system to produce and detect these fringe patterns.
- Implementing a microprocessor for data analysis and feedback control.
Main Results:
- The system measures fiber diameter at a 1-kHz rate with 0.25 micrometer precision and +/-0.25 micrometer accuracy.
- Operates over a diameter range of 50-150 micrometers.
- Maintains accuracy with lateral fiber movement within a 1-cm window.
- Requires only optical calibration and no standard fiber, demonstrating long-term stability.
Conclusions:
- The developed electrooptic system provides a robust and accurate method for in-line optical fiber diameter measurement.
- The instrument's precision and automated feedback capabilities enhance manufacturing process control and product quality.
- The system's calibration stability and operational range make it suitable for industrial applications.
