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Related Experiment Video

Updated: Nov 5, 2025

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
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Microstructured optical fiber temperature sensor based on the self-phase modulation effect.

Xiaoyu Chen, Xin Yan, Xuenan Zhang

    Optics Express
    |May 14, 2021
    PubMed
    Summary

    We developed a novel, highly sensitive temperature sensor using self-phase modulation (SPM) in a custom microstructured optical fiber (MOF). This SPM-based optical fiber sensor achieves a sensitivity of 1.296 nm/°C, offering a promising new mechanism for temperature detection.

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    Area of Science:

    • Photonics and Optical Sensing
    • Materials Science and Engineering
    • Fiber Optics Technology

    Background:

    • Accurate temperature sensing is crucial across various scientific and industrial applications.
    • Existing optical fiber sensors often face limitations in sensitivity or complexity.
    • Self-phase modulation (SPM) in optical fibers presents an underexplored phenomenon for sensing applications.

    Purpose of the Study:

    • To propose and experimentally validate a novel temperature sensor utilizing self-phase modulation (SPM) in a microstructured optical fiber (MOF).
    • To investigate the temperature sensing performance based on the spectral characteristics of SPM.
    • To establish a new SPM-based sensing mechanism for optical fiber temperature sensors.

    Main Methods:

    • Fabrication of a custom microstructured optical fiber (MOF) with three rings of air holes.

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  • Experimental evaluation of temperature sensing performance by monitoring the 3 dB bandwidth of the SPM spectrum.
  • Systematic variation of temperature, pump wavelength, and average pump power during experiments.
  • Theoretical simulation to complement and validate experimental findings.

    • Main Results:

    • Achieved a high temperature sensitivity of 1.296 nm/°C at a pump wavelength of 1400 nm and 600 mW average pump power.
    • Demonstrated good agreement between experimental results and theoretical simulations.
    • Confirmed the feasibility of SPM-based temperature sensing in optical fibers.

    Conclusions:

    • This study presents the first experimental demonstration of SPM-based temperature sensing using a MOF.
    • The proposed sensor exhibits high sensitivity, a simple structure, and low cost potential.
    • This work validates a new temperature sensing mechanism with significant implications for future sensor development.