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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 14 — Jul. 2, 2012
  • pp: 15071–15078

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

Takeshi Yasui, Kohji Kawamoto, Yi-Da Hsieh, Yoshiyuki Sakaguchi, Mukesh Jewariya, Hajime Inaba, Kaoru Minoshima, Francis Hindle, and Tsutomu Araki  »View Author Affiliations


Optics Express, Vol. 20, Issue 14, pp. 15071-15078 (2012)
http://dx.doi.org/10.1364/OE.20.015071


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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.

© 2012 OSA

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Spectroscopy

History
Original Manuscript: May 1, 2012
Revised Manuscript: June 9, 2012
Manuscript Accepted: June 10, 2012
Published: June 20, 2012

Citation
Takeshi Yasui, Kohji Kawamoto, Yi-Da Hsieh, Yoshiyuki Sakaguchi, Mukesh Jewariya, Hajime Inaba, Kaoru Minoshima, Francis Hindle, and Tsutomu Araki, "Enhancement of spectral resolution and accuracy in asynchronous-optical-sampling terahertz time-domain spectroscopy for low-pressure gas-phase analysis," Opt. Express 20, 15071-15078 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-14-15071


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