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Homework Help: Two level laser

  1. Sep 5, 2011 #1
    1. The problem statement, all variables and given/known data
    consider a two level atomic system , solve the rate equations for the two levels to find expressions for N1(t) and N2(t) in terms of the intial populations N1(0) and N2(0)

    2. Relevant equations

    i have been able to derive the rate equations as:


    now all i need to do is integrate each equation to find expressions for N1(t) and N2(t) but i have failed at integrating these frist order linear differential equations
    3. The attempt at a solution
  2. jcsd
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