A method of determining, from a plurality of multimode fiber optic cables, one or more multimode fiber optic cables having improved compensation for both material dispersion and modal dispersion effects, the method comprising: generating from a VCSEL a plurality of pulses of light radiation having a radius-dependent wavelength and launching the pulses into each multimode fiber optic cable, wherein each pulse of light radiation is launched at a different radial offset; determining, for each multimode fiber optic cable, a DMD waveform profile along with a pulse delay for each pulse of light at each radial offset; calculating the EMB from the DMD waveforms profile, wherein the EMB is calculated by: summing the DMD waveform profiles to model a resultant output signal waveform; using a mathematical conversion to the frequency domain, numerically dividing output and input waveforms to compute a bandwidth of the multimode fiber optic cable; applying weighting functions to simulate a radial optical power distribution of a plurality of representative VCSELs to determine the minimum EMB; calculating the EMB of the multimode fiber optic cable by multiplying the minimum EMB by 1.13; determining, for each multimode fiber optic cable, if there are differences in pulse delays for each DMD waveform profile; and determining if differences in pulse delays form a left or a right DMD temporal waveform shift as the radial offsets are increased; wherein, if the differences in pulse delays form a left DMD temporal waveform shift compared to a standard parabolic DMD waveform for a radius-dependent wavelength, as the radial offsets are increased, determining that a lower-than-standard parabolic index of refraction in an outer region of a core of the multimode fiber optic cable is required to compensate for both material dispersion and modal dispersion compared to a multimode fiber optic cable not exhibiting the left DMD temporal waveform shift; or wherein, if the differences in pulse delays form a right DMD temporal waveform shift compared to a standard parabolic DMD waveform for a radius-dependent wavelength, as the radial offsets are increased, determining that a higher-than-standard parabolic index of refraction in an outer region of a core of the multimode fiber optic cable is required to compensate for both material dispersion and modal dispersion compared to a multimode fiber optic cable not exhibiting the right DMD temporal waveform shift. generating from a VCSEL a plurality of pulses of light radiation having a radius-dependent wavelength and launching the pulses into each multimode fiber optic cable, wherein each pulse of light radiation is launched at a different radial offset; determining, for each multimode fiber optic cable, a DMD waveform profile along with a pulse delay for each pulse of light at each radial offset; calculating the EMB from the DMD waveforms profile, wherein the EMB is calculated by: summing the DMD waveform profiles to model a resultant output signal waveform; using a mathematical conversion to the frequency domain, numerically dividing output and input waveforms to compute a bandwidth of the multimode fiber optic cable; applying weighting functions to simulate a radial optical power distribution of a plurality of representative VCSELs to determine the minimum EMB; calculating the EMB of the multimode fiber optic cable by multiplying the minimum EMB by 1.13; summing the DMD waveform profiles to model a resultant output signal waveform; using a mathematical conversion to the frequency domain, numerically dividing output and input waveforms to compute a bandwidth of the multimode fiber optic cable; applying weighting functions to simulate a radial optical power distribution of a plurality of representative VCSELs to determine the minimum EMB; calculating the EMB of the multimode fiber optic cable by multiplying the minimum EMB by 1.13; determining, for each multimode fiber optic cable, if there are differences in pulse delays for each DMD waveform profile; and determining if differences in pulse delays form a left or a right DMD temporal waveform shift as the radial offsets are increased; wherein, if the differences in pulse delays form a left DMD temporal waveform shift compared to a standard parabolic DMD waveform for a radius-dependent wavelength, as the radial offsets are increased, determining that a lower-than-standard parabolic index of refraction in an outer region of a core of the multimode fiber optic cable is required to compensate for both material dispersion and modal dispersion compared to a multimode fiber optic cable not exhibiting the left DMD temporal waveform shift; or wherein, if the differences in pulse delays form a right DMD temporal waveform shift compared to a standard parabolic DMD waveform for a radius-dependent wavelength, as the radial offsets are increased, determining that a higher-than-standard parabolic index of refraction in an outer region of a core of the multimode fiber optic cable is required to compensate for both material dispersion and modal dispersion compared to a multimode fiber optic cable not exhibiting the right DMD temporal waveform shift.