CALCULATION OF VIBRATIONAL LEVEL POPULATIONS IN MULTIPHOTON ABSORPTION PROCESSES
Creators:Hougen, Jon T.
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Publisher:Ohio State University
A simple procedure has been developed for computing steady-state excited vibrational state populations for multiphoton absorption processes in many level systems. The procedure combines various techniques already in the literature, principally expansion of the density matrix as a Fourier series in the frequency of the monochromatic radiation field, and introduction of linewidths and thermal relaxation by the addition of empirical terms to the density-matrix time-development equation. Numerical computations can be carried out quickly on idealized systems, using commercially available band matrix inversion routines. A sample calculation for a 10-level, 9-photon process will be presented.
Author Institution: National Bureau of Standards
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