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<p>Gas detection, encompassing both species identification and concentration quantification, is a critical capability. However, within a compact photonic chemical sensing unit, the simultaneous realization of these two objectives still remains elusive. Here, leveraging silicon photonics as the foundational platform, we introduce a high-precision multi-species gas mapper that integrates advances in nanoscience and fiber sensing. In this scheme, on-chip Kerr soliton dual-microcombs simultaneously drive and demodulate a network of nanomaterial-functionalized micro fiber Bragg grating (μFBG) detectors. This on-chip &amp; on-fiber hybrid system achieves individual identification for 12 gas components with remarkable sensitivity. Within this single-laser-source, single-fiber architecture, responses across diverse nanomaterial-functionalized μFBGs are inherently independent, enabling each microcomb-line-driven sensor to exhibit high specificity and sensitivity to its target gas, attaining a record-low detection limit of 24.3 parts per billion (ppb) in single-shot measurements and 2.1&#xa0;ppb post-averaging. Furthermore, the system enables high-fidelity fingerprint analysis of complex gas mixtures, with a maximum measurement error below 2.27%. This synergistic fusion of chip-scale dual-microcomb photonics with nanomaterial-enhanced optical sensor arrays represents a significant cross-disciplinary advancement, paving a way towards intelligent, miniaturized opto-chemical analysis platforms.</p>

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Gas mapping based-on dual microcomb driven nanomaterial functionalized fiber Bragg grating string

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年1月7日

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  • Yi-Wei Li,
  • Yu-Chen Wang,
  • Zi-Han Liu,
  • Yan-Hong Guo,
  • Xin-Yue He,
  • Ya-Qian Zhao,
  • Yu-Pei Liang,
  • Zhen-Heng Xu,
  • Jun-Hao Li,
  • Guang-Ming Zhao,
  • Ming Li,
  • Yun-Jiang Rao,
  • Teng Tan,
  • Bai-Cheng Yao

摘要

Gas detection, encompassing both species identification and concentration quantification, is a critical capability. However, within a compact photonic chemical sensing unit, the simultaneous realization of these two objectives still remains elusive. Here, leveraging silicon photonics as the foundational platform, we introduce a high-precision multi-species gas mapper that integrates advances in nanoscience and fiber sensing. In this scheme, on-chip Kerr soliton dual-microcombs simultaneously drive and demodulate a network of nanomaterial-functionalized micro fiber Bragg grating (μFBG) detectors. This on-chip & on-fiber hybrid system achieves individual identification for 12 gas components with remarkable sensitivity. Within this single-laser-source, single-fiber architecture, responses across diverse nanomaterial-functionalized μFBGs are inherently independent, enabling each microcomb-line-driven sensor to exhibit high specificity and sensitivity to its target gas, attaining a record-low detection limit of 24.3 parts per billion (ppb) in single-shot measurements and 2.1 ppb post-averaging. Furthermore, the system enables high-fidelity fingerprint analysis of complex gas mixtures, with a maximum measurement error below 2.27%. This synergistic fusion of chip-scale dual-microcomb photonics with nanomaterial-enhanced optical sensor arrays represents a significant cross-disciplinary advancement, paving a way towards intelligent, miniaturized opto-chemical analysis platforms.