Dual-Comb Real-Time Molecular Fingerprint Imaging
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arXiv
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| Format: | Preprint |
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2020
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| author | Voumard, T. Wildi, T. Brasch, V. Álvarez, R. Gutiérrez Ogando, G. Vergara Herr, T. |
| author_facet | Voumard, T. Wildi, T. Brasch, V. Álvarez, R. Gutiérrez Ogando, G. Vergara Herr, T. |
| contents | Hyperspectral imaging provides spatially resolved spectral information. Utilising dual frequency combs as active illumination sources, hyperspectral imaging with ultra-high spectral resolution can be implemented in a scan-free manner when a detector array is used for heterodyne detection. However, relying on low-noise detector arrays, this approach is currently limited to the near-infrared regime. Here, we show that dual-comb hyperspectral imaging can be performed with an uncooled near-to-mid-infrared detector by exploiting the detector array's high frame-rate and the combs' high-mutual coherence. The system simultaneously acquires hyperspectral data in 30~spectral channels across 16'384 pixel, from which molecule-specific gas concentration images can be derived. Artificial intelligence enables rapid data reduction and real-time image reconstruction. Owing to the detector array's sensitivity from 1~$μ$m to 5~$μ$m wavelength, this demonstration lays the foundation for versatile imaging of molecular fingerprint signatures across the infrared wavelength-regime in real-time. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2006_02115 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Dual-Comb Real-Time Molecular Fingerprint Imaging Voumard, T. Wildi, T. Brasch, V. Álvarez, R. Gutiérrez Ogando, G. Vergara Herr, T. Optics Applied Physics Hyperspectral imaging provides spatially resolved spectral information. Utilising dual frequency combs as active illumination sources, hyperspectral imaging with ultra-high spectral resolution can be implemented in a scan-free manner when a detector array is used for heterodyne detection. However, relying on low-noise detector arrays, this approach is currently limited to the near-infrared regime. Here, we show that dual-comb hyperspectral imaging can be performed with an uncooled near-to-mid-infrared detector by exploiting the detector array's high frame-rate and the combs' high-mutual coherence. The system simultaneously acquires hyperspectral data in 30~spectral channels across 16'384 pixel, from which molecule-specific gas concentration images can be derived. Artificial intelligence enables rapid data reduction and real-time image reconstruction. Owing to the detector array's sensitivity from 1~$μ$m to 5~$μ$m wavelength, this demonstration lays the foundation for versatile imaging of molecular fingerprint signatures across the infrared wavelength-regime in real-time. |
| title | Dual-Comb Real-Time Molecular Fingerprint Imaging |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2006.02115 |