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Updated: Jan 19, 2026

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Multi-direction bending sensor based on supermodes of multicore PCF laser.

Jia Shi, Fan Yang, Dexian Yan

    Optics Express
    |September 13, 2019
    PubMed
    Summary

    This study demonstrates a novel multi-direction bending sensor using an 18-core photonic crystal fiber (PCF) laser. The sensor accurately measures bending direction and radius with minimal temperature crosstalk.

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    Area of Science:

    • Optoelectronics
    • Fiber Optics
    • Sensing Technology

    Background:

    • Photonic crystal fibers (PCFs) offer unique light manipulation properties.
    • Fiber laser sensors provide robust and compact sensing solutions.
    • Accurate multi-directional bending sensing is crucial for various applications.

    Purpose of the Study:

    • To demonstrate a multi-direction bending sensor utilizing an 18-core PCF.
    • To investigate the theoretical and experimental design of the PCF-based sensor.
    • To analyze the sensor's performance in measuring bending direction, radius, and thermal effects.

    Main Methods:

    • Utilizing an 18-core photonic crystal fiber (PCF) as both laser gain and sensing medium.
    • Employing a fiber laser sensor operating at approximately 1032.32 nm.
    • Using a CMOS image capture system to analyze supermode intensity distribution for directional sensing.
    • Experimentally measuring bending radius down to 0.11 m and evaluating thermal crosstalk.

    Main Results:

    • Successfully demonstrated a multi-direction bending sensor based on an 18-core PCF.
    • Achieved measurement of bending in six distinct directions by analyzing supermode patterns.
    • Quantified bending radius detection capability down to 0.11 m.
    • Confirmed low temperature crosstalk in the developed sensing system.

    Conclusions:

    • The 18-core PCF laser sensor is effective for multi-direction bending measurement.
    • The supermode intensity distribution provides a reliable basis for directional sensing.
    • The sensor exhibits good performance in terms of bending radius measurement and thermal stability.