Fast and compact time-resolved spectroscopy enabled by Quantum Walk Combs
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911173665882112 |
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| author | Heckelmann, Ina Pinto, Davide Schmitt, Uwe Beck, Mattias Faist, Jérôme |
| author_facet | Heckelmann, Ina Pinto, Davide Schmitt, Uwe Beck, Mattias Faist, Jérôme |
| contents | Optical frequency combs paved the way for fast and compact multi-component optical chemical analysis due to their broadband spectra. Dual-comb spectrometers embody this technology, but their design requires a pair of matched combs, adding complexity to the system. In this study, we propose and implement a scheme for a rapid, compact spectroscopic analyser that operates without moving components, leveraging the tunability and speed of a single quantum walk comb laser. Previously, these combs have been shown to deliver stable, tunable and broadband lasing. Here, a single quantum cascade laser-based comb emitting within the significant molecular fingerprint region of the mid-infrared spectrum was employed in a non-interferometric setup for targeted and non-targeted analysis of various organic solvent vapours. With a time resolution as small as 10 microseconds and a high dynamic range reaching three orders of magnitude in concentration, this approach is suitable for the real-time analysis of chemical kinetics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20112 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fast and compact time-resolved spectroscopy enabled by Quantum Walk Combs Heckelmann, Ina Pinto, Davide Schmitt, Uwe Beck, Mattias Faist, Jérôme Optics Optical frequency combs paved the way for fast and compact multi-component optical chemical analysis due to their broadband spectra. Dual-comb spectrometers embody this technology, but their design requires a pair of matched combs, adding complexity to the system. In this study, we propose and implement a scheme for a rapid, compact spectroscopic analyser that operates without moving components, leveraging the tunability and speed of a single quantum walk comb laser. Previously, these combs have been shown to deliver stable, tunable and broadband lasing. Here, a single quantum cascade laser-based comb emitting within the significant molecular fingerprint region of the mid-infrared spectrum was employed in a non-interferometric setup for targeted and non-targeted analysis of various organic solvent vapours. With a time resolution as small as 10 microseconds and a high dynamic range reaching three orders of magnitude in concentration, this approach is suitable for the real-time analysis of chemical kinetics. |
| title | Fast and compact time-resolved spectroscopy enabled by Quantum Walk Combs |
| topic | Optics |
| url | https://arxiv.org/abs/2509.20112 |