Methane Sensing via Unbalanced Nonlinear Interferometry using a CMOS Camera
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909332327628800 |
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| author | Dong, Jinghan Cardoso, Arthur C. Zhou, Haichen Zhang, Jingrui Nie, Weijie Clark, Alex S. Rarity, John G. |
| author_facet | Dong, Jinghan Cardoso, Arthur C. Zhou, Haichen Zhang, Jingrui Nie, Weijie Clark, Alex S. Rarity, John G. |
| contents | Here we present a high-sensitivity, rapid, and low-cost method for methane sensing based on a nonlinear interferometer. This method utilizes signal photons generated by stimulated parametric down-conversion (ST-PDC), enabling the use of a silicon detector to capture high-precision methane absorption spectra in the mid-infrared region. By controlling the system loss, we achieve more significant changes in visibility, thereby increasing sensitivity. The methane concentration within a gas cell is determined accurately. In addition, ST-PDC enables long-distance sensing and the capability to measure low ambient methane concentrations in the real world. A low-cost CMOS camera is employed to capture spatial interference fringes, ensuring fast and efficient detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_20201 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Methane Sensing via Unbalanced Nonlinear Interferometry using a CMOS Camera Dong, Jinghan Cardoso, Arthur C. Zhou, Haichen Zhang, Jingrui Nie, Weijie Clark, Alex S. Rarity, John G. Optics Applied Physics Here we present a high-sensitivity, rapid, and low-cost method for methane sensing based on a nonlinear interferometer. This method utilizes signal photons generated by stimulated parametric down-conversion (ST-PDC), enabling the use of a silicon detector to capture high-precision methane absorption spectra in the mid-infrared region. By controlling the system loss, we achieve more significant changes in visibility, thereby increasing sensitivity. The methane concentration within a gas cell is determined accurately. In addition, ST-PDC enables long-distance sensing and the capability to measure low ambient methane concentrations in the real world. A low-cost CMOS camera is employed to capture spatial interference fringes, ensuring fast and efficient detection. |
| title | Methane Sensing via Unbalanced Nonlinear Interferometry using a CMOS Camera |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2407.20201 |