A Question about stimulated Raman emission

ure227922
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How is that Stimulated Raman emission relies on damping of the phonon field that is much greater than for that of the optical Stokes field?
I have read a paper states that "Stimulated Raman emission relies on damping of the phonon field that is much greater than for that of the optical Stokes field". But I cannot understand this, since all the materials I read do not state this. Can anyone explain it intuitively?
 
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ure227922 said:
I have read a paper
which paper?
 

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