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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Digital signal-processing techniques for electronically scanned optical-fiber white-light interferometry.

S Chen, A W Palmer, K T Grattan

    Applied Optics
    |August 25, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Digital processing techniques enhance optical-fiber sensor systems using electronically scanned white-light interferometry. These methods improve fringe restoration, identification, and resolution, boosting measurement dynamic range in noisy conditions.

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    Last Updated: Jun 9, 2026

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    Area of Science:

    • Optical Fiber Sensors
    • Interferometry
    • Digital Signal Processing

    Background:

    • Electronically scanned white-light interferometry is crucial for optical-fiber sensing.
    • Accurate fringe analysis is essential for reliable sensor performance.
    • Low signal-to-noise ratios can limit measurement accuracy and dynamic range.

    Purpose of the Study:

    • To present digital processing techniques for optical-fiber sensor systems.
    • To improve fringe restoration, fringe-order identification, and phase resolution.
    • To enhance the dynamic range of measurements in low signal-to-noise environments.

    Main Methods:

    • Fringe restoration by dividing beam intensity profile from the signal.
    • Zero-order fringe identification using a centroid algorithm.
    • Phase resolution enhancement via linear interpolation or localized centroid algorithms.

    Main Results:

    • Successfully restored pure low-coherence interference fringe patterns.
    • Accurately identified the central (zero-order) fringe.
    • Demonstrated significant increases in measurement dynamic range.
    • Validated techniques through theoretical analysis, simulations, and experiments.

    Conclusions:

    • The presented digital processing techniques are effective for optical-fiber sensor systems.
    • These methods significantly improve measurement capabilities, especially under low signal-to-noise conditions.
    • Enhanced dynamic range and resolution are achievable with these advanced processing strategies.