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Related Experiment Video

Updated: Jun 22, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
09:10

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Optical microfiber coil resonator refractometric sensor.

Fei Xu, Peter Horak, Gilberto Brambilla

    Optics Express
    |June 24, 2009
    PubMed
    Summary
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    This study introduces a new optical fiber sensor for measuring refractive index. The compact and robust device achieves high sensitivity and resolution, ideal for various applications.

    Area of Science:

    • Photonics and optical sensing technologies.
    • Nanomaterials and device fabrication.
    • Biomedical and chemical sensing.

    Background:

    • Refractive index sensing is crucial for analyzing chemical and biological samples.
    • Existing sensors face limitations in sensitivity, size, or integration.
    • Optical fiber sensors offer advantages in remote and label-free detection.

    Purpose of the Study:

    • To develop a novel refractometric sensor with enhanced performance.
    • To investigate the influence of structural parameters on sensor sensitivity.
    • To demonstrate a compact and robust sensing platform.

    Main Methods:

    • Fabrication of a coated all-coupling optical-fiber-nanowire microcoil resonator.
    • Theoretical calculation of device sensitivity.

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  • Analysis of the dependence of sensitivity on nanowire diameter and coating thickness.

    • Main Results:

    • A novel refractometric sensor based on a coated all-coupling optical-fiber-nanowire microcoil resonator was presented.
    • The device is robust, compact, and includes an intrinsic fluidic channel.
    • Sensitivity up to 700 nm/RIU and refractive index resolution as low as 10(-10) were predicted.

    Conclusions:

    • The proposed sensor design offers high sensitivity and resolution.
    • The sensor's performance is tunable via nanowire diameter and coating thickness.
    • This technology holds promise for advanced refractometric sensing applications.