Doppler-Limited Absorption and Fluorescence Spectroscopy with Lasers

  • Wolfgang Demtröder

Abstract

After having presented in the previous chapter the different realizations of tunable lasers, we now discuss their applications in absorption and fluorescence spectroscopy. At first those methods where the spectral resolution is limited by the Doppler width of the molecular absorption lines will be treated. This limit can in fact be reached if the laser line-width is small compared with the Doppler width. In several examples, such as optical pumping or laser-induced fluorescence spectroscopy, multimode lasers may be employed, although in most cases single-mode lasers will be superior. In general, however, these lasers may not necessarily be frequency stabilized as long as the frequency jitter is small compared with the absorption line-width. We compare several detection techniques of molecular absorption with regard to their sensitivity and their feasibility in the different spectral regions. Some examples illustrate the methods to give the reader a feeling of what has been achieved. After the discussion of the “Doppler-limited spectroscopy”, Chaps. 7–10 give an extensive treatment of various techniques which allow sub-Doppler spectroscopy.

Keywords

Microwave Attenuation Uranium Barium Fluores 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Wolfgang Demtröder
    • 1
  1. 1.Fachbereich PhysikUniversität KaiserslauternKaiserslauternGermany

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