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

Takeshi Yasui | Zendy; Kohji Kawamoto | Zendy; Yi-Da Hsieh | Zendy; Yoshiyuki Sakaguchi | Zendy; Mukesh Jewariya | Zendy; Hajime Inaba | Zendy; Kaoru Minoshima | Zendy; Francis Hindle | Zendy; Tsutomu Araki | Zendy

Open Access

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

Author(s) -

Takeshi Yasui,

Kohji Kawamoto,

Yi-Da Hsieh,

Yoshiyuki Sakaguchi,

Mukesh Jewariya,

Hajime Inaba,

Kaoru Minoshima,

Francis Hindle,

Tsutomu Araki

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.015071

Subject(s) - terahertz radiation , optics , spectral resolution , spectroscopy , femtosecond , materials science , terahertz spectroscopy and technology , resolution (logic) , laser , spectral line , physics , quantum mechanics , astronomy , artificial intelligence , computer science

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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