Patent ID: 8260103

Claim:
A multimode optical fiber, wherein the multimode optical fiber possesses a refractive index profile such that a measurement of the dispersion modal delay (DMD), the DMD graph of which has been modified by adding a positive delay (Δt trace ) to each trace: Δ ⁢ ⁢ t trace = Δ ⁢ ⁢ λ max × D × L ⁡ ( r trace a ) β wherein r trace is the center position of the injection of the light pulse corresponding to the trace, a is the core radius of the multimode optical fiber, L is the length of the multimode optical fiber, D is a chosen value for typical chromatic dispersion, β is the coefficient of the delay, and Δλ max is a chosen value for the maximum spectral width between the wavelength of the highest order mode and the wavelength of the lowest order mode such that (Δλ max ×D)>0.07 ps/m, gives a calculated effective bandwidth (EBc) of greater than 6000 MHz·km as calculated using the modified DMD graph.