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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 5 — Feb. 10, 2010
  • pp: 927–935

Atmospheric degradation correction of terahertz beams using multiscale signal restoration

Choonwoo Ryu and Seong G. Kong  »View Author Affiliations


Applied Optics, Vol. 49, Issue 5, pp. 927-935 (2010)
http://dx.doi.org/10.1364/AO.49.000927


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Abstract

We present atmospheric degradation correction of terahertz (THz) beams based on multiscale signal decomposition and a combination of a Wiener deconvolution filter and artificial neural networks. THz beams suffer from strong attenuation by water molecules in the air. The proposed signal restoration approach finds the filter coefficients from a pair of reference signals previously measured from low- humidity conditions and current background air signals. Experimental results with two material samples of different chemical compositions demonstrate that the multiscale signal restoration technique is effective in correcting atmospheric degradation compared to individual and non-multiscale approaches.

© 2010 Optical Society of America

OCIS Codes
(200.4260) Optics in computing : Neural networks
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.7410) Imaging systems : Wavelets

ToC Category:
Imaging Systems

History
Original Manuscript: October 28, 2009
Revised Manuscript: January 11, 2010
Manuscript Accepted: January 15, 2010
Published: February 9, 2010

Citation
Choonwoo Ryu and Seong G. Kong, "Atmospheric degradation correction of terahertz beams using multiscale signal restoration," Appl. Opt. 49, 927-935 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-5-927

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