Patent ID: 8630545

Claim:
An optical system, comprising: a polychromatic optical source for emitting an optical signal comprising a plurality of transverse modes of distinct transverse mode order, wherein each transverse mode has its own discrete wavelength; an optical link comprising at least one portion of multimode optical fiber having a graded-index core, wherein said multimode optical fiber has a nominal refractive index profile described by the relationship: n ⁡ ( r ) = n 1 ⁢ 1 - 2 ⁢ Δ ⁡ ( r a ) α where, n 1 is the maximum refractive index of said multimode optical fiber's core; r is the radial distance from said multimode optical fiber's optical axis; a is the radius of said multimode optical fiber's core; Δ is a non-dimensional parameter indicative of the refractive index difference between said multimode optical fiber's core and said multimode optical fiber's cladding; and α is a non-dimensional parameter indicative of the shape of the refractive index profile of said multimode optical fiber's core, wherein 1.8≦α≦2.2; and an optical device positioned between said polychromatic optical source and an input of said multimode optical fiber; wherein, said optical device is suitable for spatially re-arranging the plurality of transverse modes dependent on the transverse mode order for coupling the energy of each of the transverse modes into a suitable propagation mode for at least partially compensating modal dispersion of said optical link with chromatic dispersion.