A method of manufacturing a graded-index multimode optical fiber having at least one dopant, the graded-index multimode optical fiber comprising: a core , the core having a center, a radius R, and a refractive index profile; and a cladding surrounding the core , the method comprising the steps of: selecting the at least one dopant; introducing the at least one dopant into the core; and controlling the concentration of the at least one dopant during the introduction to produce the refractive index profile, the at least one dopant being selected and the concentration of the at least one dopant being controlled such that the refractive index profile causes the graded-index multimode optical fiber to exacerbate modal chromatic dispersion interaction when coupled with an optical transmitter by having a right-shifted differential mode delay "DMD" plot, the at least one dopant being further selected and the concentration of the at least one dopant being further controlled such that an effective modal bandwidth "EMB" of the graded-index multimode optical fiber is equal to a minimum modal bandwidth requirement specified by a defined standard +/- 10%; wherein the produced refractive index profile is comprised of refractive indices n ( r ) defined by a function of a radial distance r from the center of the core: n r = n 1 * 1 − 2 r R α Δ 0 , for r < R , where: n 1 is a refractive index at the center of the core; n 2 is a refractive index of the cladding; R is a radius of the core having the ideal refractive index profile; α is a parameter defining a shape of the ideal refractive index profile; and Δ 0 = n 1 2 − n 2 2 2 n 1 2 . a core , the core having a center, a radius R, and a refractive index profile; and a cladding surrounding the core , the method comprising the steps of: selecting the at least one dopant; introducing the at least one dopant into the core; and controlling the concentration of the at least one dopant during the introduction to produce the refractive index profile, the at least one dopant being selected and the concentration of the at least one dopant being controlled such that the refractive index profile causes the graded-index multimode optical fiber to exacerbate modal chromatic dispersion interaction when coupled with an optical transmitter by having a right-shifted differential mode delay "DMD" plot, the at least one dopant being further selected and the concentration of the at least one dopant being further controlled such that an effective modal bandwidth "EMB" of the graded-index multimode optical fiber is equal to a minimum modal bandwidth requirement specified by a defined standard +/- 10%; wherein the produced refractive index profile is comprised of refractive indices n ( r ) defined by a function of a radial distance r from the center of the core: n r = n 1 * 1 − 2 r R α Δ 0 , for r < R , where: n 1 is a refractive index at the center of the core; n 2 is a refractive index of the cladding; R is a radius of the core having the ideal refractive index profile; α is a parameter defining a shape of the ideal refractive index profile; and Δ 0 = n 1 2 − n 2 2 2 n 1 2 . n 1 is a refractive index at the center of the core; n 2 is a refractive index of the cladding; R is a radius of the core having the ideal refractive index profile; α is a parameter defining a shape of the ideal refractive index profile; and Δ 0 = n 1 2 − n 2 2 2 n 1 2 . <EOS>