  Photonic crystal fibers are used in fiber amplifiers and lasers because of
the flexibility in the design of mode area and dispersion. However, these
quantities depend strongly on the wavelength. The wavelength dependence of
gain, nonlinearity and dispersion are investigated here by including the
wavelength dependence explicitly in the nonlinear Schr\"odinger equation for
photonic crystal fibers with varying periods and hole sizes. The effect of the
wavelength dependence of each parameter is studied separately as well as
combined. The wavelength dependence of the parameters is shown to create
asymmetry to the spectrum and chirp, but to have a moderating effect on pulse
broadening. The effect of including the wavelength dependence of nonlinearity
in the simulations is demonstrated to be the most significant compared that of
dispersion or gain.
