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Related Experiment Video

Updated: Jul 1, 2025

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Packaged WGM MBR sensor for high-performance temperature measurement using CNN-based multimode barcode images.

Haiju Li, Yang Lu, Shengao Zhou

    Optics Express
    |March 5, 2024
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel temperature measurement method using convolutional neural networks (CNNs) with whispering gallery mode (WGM) optical microresonator sensors. The approach achieves high accuracy and real-time monitoring for precise temperature sensing applications.

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    Area of Science:

    • Optical sensing
    • Nanotechnology
    • Machine learning

    Background:

    • Whispering gallery mode (WGM) optical microresonators offer high sensitivity and resolution for temperature measurements.
    • Existing WGM sensors face challenges in stability, single resonant mode tracking, and real-time monitoring.

    Purpose of the Study:

    • To develop a robust and real-time temperature measurement approach using WGM microresonator sensors.
    • To leverage convolutional neural networks (CNNs) for analyzing WGM sensor data.

    Main Methods:

    • Utilized a whispering gallery mode microbottle resonator (WMBR) sensor with a packaged microresonator-taper coupling structure (packaged-MTCS).
    • Employed a convolutional neural network (CNN) to recognize multimode barcode images from the WGM sensor.
    • Developed a robust packaging for the microresonator-taper coupling structure.

    Main Results:

    • Achieved high sensitivity of -14.28 pm/°C and resolution of 3.5 × 10⁻⁴ °C over a 96 °C dynamic range.
    • Demonstrated real-time temperature measurement with 96.85% average detection accuracy and a speed of 0.68s per image.
    • Showcased the stability and reliability of the packaged-MTCS.

    Conclusions:

    • The CNN-based approach significantly enhances the performance of WGM MBR sensors for precise temperature measurements.
    • This method overcomes limitations in stability and real-time monitoring, paving the way for advanced optical sensing.
    • The findings support the potential for stable soliton microcomb excitation via thermal tuning.