(color online) Input spatial energy flux density distributions and profiles of amplified signal spectral CG in distinct cases. (a) Input signal profile is Gaussian while pump profile is top-hat. (b) Input signal and pump profiles are 5^th order super-Gaussian. (c) Input signal profile is 5^th order super-Gaussian while pump profile is top-hat with the same radius as that of the signal. (d) Input signal profile is 5th order super-Gaussian, pump profile is top-hat, and the signal spot is larger than the pump.