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Enhancement of spectral resolution and accuracy in asynchronous-optical-sampling terahertz time-domain spectroscopy for low-pressure gas-phase analysis

Year: 2012
Type: article
Abstract: 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.
DOI: 10.1364/oe.20.015071
Authors: Takeshi Yasui, Kohji Kawamoto, Yi-Da Hsieh, Yoshiyuki Sakaguchi, Mukesh Jewariya, Hajime Inaba, Kaoru Minoshima, Francis Hindle, Tsutomu Araki
Institutions: The University of Osaka, Tokushima University, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Université du littoral côte d'opale, Laboratoire de Physico-Chimie de l'Atmosphère
Language: English
Open Access status: gold
Estimated APC paid: $2,270
OpenAlex ID: W2016946385
FWCI: 3.639
Cites: 17
Cited by: 42
Related to: 10