Enhancement of spectral resolution and accuracy in asynchronous-optical-sampling terahertz time-domain spectroscopy for low-pressure gas-phase analysis
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The spectral resolution and accuracy of asynchronous-optical-sampling terahertz time-domain spectroscopy (ASOPS-THz-TDS) were evaluated by examining low-pressure gas-phase samples. Use of dual 56-MHz, erbium (Er)-doped, mode-locked femtosecond fiber lasers enhanced the spectral resolution to as low as 50.5 MHz and the spectral accuracy to as low as 6.2 × 10(-6). The results indicate that ASOPS-THz-TDS has the potential to achieve high spectral resolution, high spectral accuracy, and wide spectral coverage at the same time. ASOPS-THz-TDS will open a new door to gas-phase spectroscopy of multiple chemical species in the field of atmospheric gas analysis.
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The use of ASOPS has expanded the target of THz-TDS to substances with narrow spectral lines, such as gas molecules.
“The use of ASOPS has expanded the target of THz-TDS to substances with narrow spectral lines, such as gas molecules [2-4].”
From Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers (2023) · cites this paper as [3]
Most ASOPS THz-TDS techniques use IFG, sum-frequency generation, or two-photon absorption of pulsed lasers as a trigger for signal accumulation.
“Most ASOPS THz-TDS techniques use IFG, sum-frequency generation, or twophoton absorption of pulsed lasers as a trigger for signal accumulation [3,11,12,18,31].”
From Jitter correction for asynchronous optical sampling terahertz spectroscopy using free-running pulsed lasers (2023) · cites this paper as [3]
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References 17 · Cited by 42
- Authors
- Yasui, T., Kawamoto, K., Hsieh, Y.-D., Sakaguchi, Y., Jewariya, M., Inaba, H., Minoshima, K., Hindle, F., & Araki, T.
- Affiliations
- The University of Osaka (JP)
- Tokushima University (JP)
- National Metrology Institute of Japan (JP)
- Université du littoral côte d'opale (FR)
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2012-06-20
- Volume
- 20
- Issue
- 14
- Pages
- 15071
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W2016946385
- Cited by
- 42
- References
- 17
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 4 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 1 · 2018: 4 · 2017: 3 · 2016: 4 · 2015: 2 · 2014: 6 · 2013: 7 · 2012: 2
- FWCI
- 3.48
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Japan Society for the Promotion of Science (23656265, 23860029)
- RIKEN
- Collaborative Research Based on Industrial Demand
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Keywords
- asynchronous optical sampling, terahertz time-domain spectroscopy, spectral resolution, spectral accuracy, erbium-doped fiber laser, femtosecond mode-locked laser, atmospheric gas analysis, gas-phase spectroscopy
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