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Stimulated Raman Scattering Spectroscopy

  1. Apr 28, 2013 #1
    Has anyone read or seen any articles that might highlight the techniques of Stimulated Raman Scattering Spectroscopy? Or just any knowledge on the process they would be able to share? I am having a tough time getting a hold on the process and if anyone has any useful information or articles that might lay it out a bit more clearly that would be very helpful. Thank you.
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  3. Apr 29, 2013 #2

    Andy Resnick

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    Last edited by a moderator: May 6, 2017
  4. Apr 29, 2013 #3
    Frankly, Stimulated Raman Spectrosocpy is not a useful spectroscopic tool. The line/vibration with the highest gain reaches threshold first, reduces the overall gain of other lines and so dominates the specta. So instead of seeing a spectral fingerprint of all lines and species present, the spectrum consists of a single line (or often other lines associated with Stokes and anti-Stokes features of the majority species). For example, suppose one wished to monitor impurities in ethanol with SRS. Generally what you would see is only the 2928 cm-1 feature associated with the majority species ethanol and no sign of impurities.

    Consequently, spontaneous Raman scattering spectroscopy remains a popular tool yielding an easily obtained fingerprint of all vibrations/species present. Occasionally, some nonlinear approaches like CARS (Coherent Anti-Stokes Raman Spectrosocpy) are used in special cases (as for example, when background light levels are a problem, say in a flame).

    The closest spectroscopy related to SRS is cw coherent Raman gain spectroscopy popularized by Owyoung in the 70's (see for example, http://ieeexplore.ieee.org/xpl/logi...rg/iel5/3/22982/01069760.pdf?arnumber=1069760 ). It doesn't seem to be in use much nowadays, perhaps because of the need for several tunable lasers (too complex, expensive).
    Last edited: Apr 29, 2013
  5. Apr 29, 2013 #4
    Last edited by a moderator: May 6, 2017
  6. Apr 29, 2013 #5
    I am supposed to research this imaging method and give a short presentation on it for class and was looking to find any papers or articles that helped to lay out the process in a more basic manner, since I am having trouble comprehending the process. So anything that breaks down the method would be something helpful. Thanks for the help
  7. Apr 29, 2013 #6
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