Multimode fiber link dispersion compensator

A dispersion compensated multimode waveguide fiber link comprising:

• a first length of multimode waveguide having a long dimension L1, a centerline along the long dimension, a centerline refractive index ncl1, a relative index Δ1, a refractive index profile n12(r)=ncl12[1−2Δ1f1(r/a1)], extending over a central core region of circular cross section and radius a1, the center of the circular region lying on the centerline;
• a clad layer, having a minimum thickness, t1, surrounding and contacting the core region having a minimum refractive index nc1, in which at least a portion of the profile n1(r) is greater than nc1, and nc1 is the reference index for relative index Δ1;
• the profile n1(r) providing a first bandwidth, BW1, at wavelength λ1, a maximum bandwidth, BWp1, at wavelength λp1, and a second bandwidth, BW2, at wavelength λ2, BW1, BW2, and BWp1 being mathematically derivable from n1(r), nc1, a1, and t1, in which λ1≦λp1≦λ2;
• a second length of multimode waveguide, optically joined to the first length of multimode waveguide, having a long dimension L2, a centerline along the long dimension, a refractive index on centerline of ncl2, a relative refractive index Δ2 refractive index profile n22(r)=n22[1−2Δ2f(r/a2)], extending over a central core region of circular cross section and radius a2, the center of the circular region lying on the centerline;
• a clad layer, having a minimum thickness, t2, surrounding and contacting the core region having a minimum refractive index nc2, in which at least a portion of the profile n2(r) is greater than nc2;
• the profile n2(r) providing a third bandwidth, BW3, at wavelength λ1, a maximum bandwidth, BWp2, at wavelength λp2, and a fourth bandwidth, BW4, at wavelength λ2, BW3, BW4, and BWp2 being mathematically derivable from n2(r), nc2, a2, and t2, in which, λp2≦λ1 or λ2≦λp2;
• the combination of the first and second multimode waveguides forming a compensated multimode waveguide link of length L1+L2, and having a bandwidth, BWcomp1, in MHz at λ1, a bandwidth, BWcomp2, in MHz at λ2, in which at least one of BWcomp1 or BWcomp2 is greater than BW1 or BW2, respectively.