Robust asynchronous optical sampling terahertz spectroscopy using commercially available free-running lasers
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912399804596224 |
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| author | Nakagawa, Mayuri Kanda, Natsuki Nakamae, Hidekazu Akiyama, Hidefumi Matsunaga, Ryusuke |
| author_facet | Nakagawa, Mayuri Kanda, Natsuki Nakamae, Hidekazu Akiyama, Hidefumi Matsunaga, Ryusuke |
| contents | This study presents asynchronous optical sampling (ASOPS) terahertz spectroscopy using commercially available Ti:Sapphire lasers without stabilizing repetition frequency. Our postprocessing algorithm using the multiplied repetition frequency difference as the calibration signal successfully corrected the jitter, thereby allowing broadband (2.5 THz) spectroscopy with a high spectral resolution (82 MHz). The robustness of the jitter correction based on the free-running laser setup and broadband electric circuits was rigorously examined under varying temperatures, thereby demonstrating reliable long-term operations over 60 h. This study expands the applicability of the ASOPS terahertz time-domain spectroscopy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_04874 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust asynchronous optical sampling terahertz spectroscopy using commercially available free-running lasers Nakagawa, Mayuri Kanda, Natsuki Nakamae, Hidekazu Akiyama, Hidefumi Matsunaga, Ryusuke Optics This study presents asynchronous optical sampling (ASOPS) terahertz spectroscopy using commercially available Ti:Sapphire lasers without stabilizing repetition frequency. Our postprocessing algorithm using the multiplied repetition frequency difference as the calibration signal successfully corrected the jitter, thereby allowing broadband (2.5 THz) spectroscopy with a high spectral resolution (82 MHz). The robustness of the jitter correction based on the free-running laser setup and broadband electric circuits was rigorously examined under varying temperatures, thereby demonstrating reliable long-term operations over 60 h. This study expands the applicability of the ASOPS terahertz time-domain spectroscopy. |
| title | Robust asynchronous optical sampling terahertz spectroscopy using commercially available free-running lasers |
| topic | Optics |
| url | https://arxiv.org/abs/2501.04874 |