13、Nonlinear effects in such lasers can result in deposition of a large fraction of the pulse
energy in the spatial wings of the focal -plane profile.
14、The root cause of the uncertainty is the necessity to interpret the entire profile, if the total pulse
energy is recorded.
15、Computer tests using actual recordings of laser pulse profiles show that the error associated with profile normalization will not exceed 2-4%, provided apertured calorimetry is employed, and depending somewhat on the noise on the particular profile.
16、Electronic nonlinearity is most easily evaluated by recording each pulse at several intensity levels and comparing the intensities resulting from normalizing the several recordings.
17、Since shot -to -shot fluctuations are routinely observed in the spatial profile of beams from short -pulse solid-state lasers, flux values obtained solely as a result of calculated focal profiles are of little value for these lasers.
18、Recording only a slice across the beam leaves open the possibility of shot -to -shot fluctuations in symmetry.
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