Patent ID: 6363195
Filing Date: 2002-03-26
Classification: G02B,H04B

Abstract:
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 refractive index profile n1(r) 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; the profile n1(r) providing a first bandwidth, BW1, at wavelength &lgr;1, a maximum bandwidth, BWp1, at wavelength &lgr;p1, and a second bandwidth, BW2, at wavelength &lgr;2, BW1, BW2, and BWp1 being mathematically derivable from n1(r), nc1, a1, and t1, in which &lgr;1&lE;&lgr;p1&lE;&lgr;2; 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, refractive index profile n2(r) 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 &lgr;1, a maximum bandwidth, BWp2, at wavelength &lgr;p2, and a fourth bandwidth, BW4, at wavelength &lgr;2, BW3, BW4, and BWp2 being mathematically derivable from n2(r), nc2, a2, and t2, in which, &lgr;p2&lE;&lgr;1 or &lgr;p2&gE;&lgr;2; 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 &lgr;1, a bandwidth, BWcomp2 in MHz at &lgr;2, in which at least one of BWcomp1 or BWcomp2 is greater than BW1 or BW2, in MHz, respectively.