✦ LIBER ✦

Wavelength-modulated fabry-perot interferometry for quantitation of trace gas components

✍ Scribed by Bernard C. Yip; Edward S. Yeung

Book ID: 104100516
Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 351 KB
Volume: 169
Category: Article
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(00)86245-5

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✦ Synopsis

The change in refractive index of a gas sample caused by molecular absorption is monitored by Fabry-Perot interferometry in a continuous flow system. To reduce the background noise level from other absorption processes, wavelength modulation is incorporated into the excitation laser. An enhancement in the signal-to-noise ratio of up to 146 s is found for the present method relative to intensity-modulated schemes or Stark-modulated schemes.

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