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<p>Fluorescent fiber-optic temperature sensors have found widespread applications owing to their high sensitivity and broad temperature-sensing range. However, the noise induced by numerous discrete components remains challenging to address via algorithmic improvements. In this paper, a chip integrating both readout circuit and LED driver is designed and fabricated in 0.18-µm CMOS process. Based on this chip, an integrated fluorescent fiber-optic temperature sensor is built. Compared with its discrete counterparts, the integrated sensor exhibits a 12.18% reduction in noise voltage. With identical fluorescence lifetime extraction algorithm, the integrated sensor achieves a 56.47% improvement in fluorescence lifetime accuracy. Moreover, the integrated sensor exhibits a temperature resolution of 0.056&#xa0;°C, representing a 39.13% improvement over the discrete sensor. Meanwhile, the temperature measurement range spans from − 20&#xa0;°C to 120&#xa0;°C, with an average temperature sensitivity of 0.0064 ms°C<sup>− 1</sup>. This performance enhancement renders it well-suited for high-precision temperature measurement.</p>

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Chip-based high-precision fluorescent fiber-optic temperature sensor

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月7日

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  • Yuxuan Yang,
  • Jian Yang,
  • Zhixiang Cao,
  • Xiangliang Jin

摘要

Fluorescent fiber-optic temperature sensors have found widespread applications owing to their high sensitivity and broad temperature-sensing range. However, the noise induced by numerous discrete components remains challenging to address via algorithmic improvements. In this paper, a chip integrating both readout circuit and LED driver is designed and fabricated in 0.18-µm CMOS process. Based on this chip, an integrated fluorescent fiber-optic temperature sensor is built. Compared with its discrete counterparts, the integrated sensor exhibits a 12.18% reduction in noise voltage. With identical fluorescence lifetime extraction algorithm, the integrated sensor achieves a 56.47% improvement in fluorescence lifetime accuracy. Moreover, the integrated sensor exhibits a temperature resolution of 0.056 °C, representing a 39.13% improvement over the discrete sensor. Meanwhile, the temperature measurement range spans from − 20 °C to 120 °C, with an average temperature sensitivity of 0.0064 ms°C− 1. This performance enhancement renders it well-suited for high-precision temperature measurement.