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<p>A comprehensive investigation and optimization of the sensing performance for a novel hybrid apodized fiber Bragg grating (HA-FBG) have been carried out. The hybrid apodization profiles are employed to create a distinct notch in the Bragg reflectance spectrum, which is designated as the sensing signal. This approach replaces the traditional method of using the entire reflection spectrum as a sensing signal. It is observed that the sensitivity of the HA-FBG remains similar to that of the single apodization profiles; however, significant improvements are noted in detection accuracy and the quality parameter. These improvements are attributed to the substantial reduction in the full width at half maximum of the sensing signal. The comprehensive analysis underscores the superior sensing performance of Sine-Welch HA-FBGs across all investigated scenarios. Remarkably, the Sine-Welch HA-FBG yields impressive results, achieving a maximum sensitivity of 190.75&#xa0;nm/RIU, a detection accuracy of 72222.23, and a quality parameter of 8919.04/RIU. These simulation findings underscore the compelling advantages of the Sine-Welch HA-FBG in all considered cases, positioning it as the optimal choice for maximizing sensing performance.</p>

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Notch-based sensing in hybrid apodized fiber Bragg gratings

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Souryadipta Maiti,
  • Vivek Singh

摘要

A comprehensive investigation and optimization of the sensing performance for a novel hybrid apodized fiber Bragg grating (HA-FBG) have been carried out. The hybrid apodization profiles are employed to create a distinct notch in the Bragg reflectance spectrum, which is designated as the sensing signal. This approach replaces the traditional method of using the entire reflection spectrum as a sensing signal. It is observed that the sensitivity of the HA-FBG remains similar to that of the single apodization profiles; however, significant improvements are noted in detection accuracy and the quality parameter. These improvements are attributed to the substantial reduction in the full width at half maximum of the sensing signal. The comprehensive analysis underscores the superior sensing performance of Sine-Welch HA-FBGs across all investigated scenarios. Remarkably, the Sine-Welch HA-FBG yields impressive results, achieving a maximum sensitivity of 190.75 nm/RIU, a detection accuracy of 72222.23, and a quality parameter of 8919.04/RIU. These simulation findings underscore the compelling advantages of the Sine-Welch HA-FBG in all considered cases, positioning it as the optimal choice for maximizing sensing performance.