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Applied Physics B

, Volume 88, Issue 1, pp 117–123 | Cite as

Stark-enhanced diode-laser spectroscopy of formaldehyde using a modified Herriott-type multipass cell

  • C. DyroffEmail author
  • P. Weibring
  • A. Fried
  • D. Richter
  • J.G. Walega
  • A. Zahn
  • W. Freude
  • P. Werle
Article

Abstract

The combined use of a novel multipass cell and a sample modulation scheme based on the Stark effect in molecular spectra is used to suppress time dependent background signals, which in general limit spectrometer performance during measurements. A rapid background subtraction scheme, in which the external electric field was turned off on alternate scans, as well as a double modulation experiment show drift free, white noise limited characteristics up to integration times of more than 1000 s. This exceeds the generally obtained spectrometer stability by about one order of magnitude.

Keywords

Absorption Line Stark Effect Allan Variance Tunable Diode Laser Double Modulation 
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.

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • C. Dyroff
    • 1
    Email author
  • P. Weibring
    • 2
  • A. Fried
    • 2
  • D. Richter
    • 2
  • J.G. Walega
    • 2
  • A. Zahn
    • 1
  • W. Freude
    • 3
  • P. Werle
    • 1
    • 4
  1. 1.Institute for Meteorology and Climate ResearchResearch Center KarlsruheEggenstein-LeopoldshafenGermany
  2. 2.Earth Observing LaboratoryNational Center for Atmospheric ResearchBoulderUSA
  3. 3.Institute of High-Frequency and Quantum ElectronicsUniversität Karlsruhe (TH)KarlsruheGermany
  4. 4.CNR-National Institute for Applied OpticsFlorenceItaly

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