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Chinese Optics Letters

Chinese Optics Letters


  • Vol. 3, Iss. S1 — Aug. 28, 2005
  • pp: S322–S323

Measurement system of gas density based on spectrum absorption

Longjiang Zheng, Li Wei, and Yuhong Zhang  »View Author Affiliations

Chinese Optics Letters, Vol. 3, Issue S1, pp. S322-S323 (2005)

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A novel measurement system for the gas density based on spectrum absorption is studied in details. Based on the theory of Beer-Lambert, the technology of nonlinear laser diode (LD) spectrum is used to perform the polluting gases monitoring on line. The peak wavelengths of LD are changed with the applied voltage and temperature, so the technology of wavelength modulating or frequency modulating can be used at perform the measurement in wide scope. In this paper, the low density of the polluting gases, is detected by the method of harmonic detection in order to increase the detection sensitivity.

© 2005 Chinese Optics Letters

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6340) Spectroscopy : Spectroscopy, infrared

Longjiang Zheng, Li Wei, and Yuhong Zhang, "Measurement system of gas density based on spectrum absorption," Chin. Opt. Lett. 3, S322-S323 (2005)

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