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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Related Experiment Video

Updated: Jan 12, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Fast-response fiber-optic anemometer with temperature self-compensation.

Guigen Liu, Weilin Hou, Wei Qiao

    Optics Express
    |June 16, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel fiber-optic anemometer using a silicon Fabry-Pérot interferometer (FPI). This self-temperature-compensated device accurately measures wind speed by detecting cooling effects on a heated sensor.

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    Area of Science:

    • Optoelectronics
    • Sensor Technology
    • Metrology

    Background:

    • Accurate wind speed measurement is crucial in various environmental and industrial applications.
    • Traditional anemometers often face challenges with temperature fluctuations affecting accuracy.
    • Fiber-optic sensors offer advantages in harsh environments due to their immunity to electromagnetic interference.

    Purpose of the Study:

    • To develop a novel fiber-optic anemometer with inherent self-temperature compensation.
    • To leverage a Fabry-Pérot interferometer (FPI) for sensitive wind speed detection.
    • To achieve high sensitivity and fast response times in wind measurement.

    Main Methods:

    • Fabrication of an FPI sensor using a thin silicon film attached to a single-mode fiber end face.
    • Utilizing a visible laser (635 nm) for heating the FPI and infrared white-light for signal interrogation.
    • Measuring wind speed by detecting the wavelength blueshift of FPI reflection fringes caused by sensor head cooling.

    Main Results:

    • Demonstrated self-temperature-compensated wind speed measurement by comparing fringe wavelengths with and without the heating laser.
    • Achieved high sensitivity due to silicon's large thermal-optic and thermal expansion coefficients.
    • Exhibited a fast sensor response attributed to the thin silicon film's high thermal diffusivity and low mass.

    Conclusions:

    • The developed fiber-optic anemometer successfully achieves self-temperature compensation for accurate wind speed measurement.
    • The silicon-based FPI design offers tunable high sensitivity and rapid response, suitable for demanding applications.
    • This technology presents a promising advancement in optical wind sensing capabilities.