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STUDY OF APPLICATION OF THZ TIME DOMAINSPECTROSCOPY IN FOOD SAFET

  • Liying Lang
  • Na Cai
Conference paper
Part of the IFIP Advances in Information and Communication Technology book series (IFIPAICT, volume 295)

Abstract

In this paper, a new spectroscopy technology named terahertz time-domain spectroscopy (THz-TDS) is introduced, which is used in food safety. We describe a coherent subpicosecond THz spectroscopy system based on nonresonant optical rectification for the generation of THz radiation. As an example, we measured absorption spectrum of water vapor by THz-TDS in frequency from 0.5 to 2.5 THz, The experiment demonstrated that the spectroscopy resolution of system was up to 0.0001THz, which can be measured vegetable pesticide residual, for it neither need sample pretreatment nor cause pollution.

Keywords

Pesticide Residue Probe Beam Pump Beam Optical Rectification Measure Absorption Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. A. Rice, Y. Jin, X. F. Ma, and X. C. Zhang, Appl.phys.Lett. 1994, 64: 1324-1326CrossRefGoogle Scholar
  2. D. Dragoman, M. Dragoman, Progress in Quantum Electronics. 2004, 28: 1-66CrossRefGoogle Scholar
  3. L. Xu, X. C. Zhang and D. H. Auston, Appl.phys.Lett. 1992, 61: 1784-1786CrossRefGoogle Scholar
  4. Qirong Xing, Weili Zhang and K. M. Yoo, Opt Commun. 1995, 119: 113-116CrossRefGoogle Scholar
  5. R. A. Cheville, D. Grischkownsky. J. Opt. Soc. Am. B. 1999, 16: 317-321CrossRefGoogle Scholar

Copyright information

© Springer-Verlag US 2009

Authors and Affiliations

  • Liying Lang
    • 1
  • Na Cai
    • 2
  1. 1.Hebei University of EngineeringHandanChina
  2. 2.College of Information and Electrical EngineeringHebei University of EngineeringHandanChina

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