Patent ID: 8737791
Filing Date: 2014-05-27
Classification: G02B

Abstract:
1. A multi-mode optical fiber having a center and comprising the following sequential concentric regions extending radially outward from the center: an alpha core region having an essentially alpha profile extending radially from the center of the optical fiber to a distance R1, with an index n where r is the radius of the fiber, n 1 is the refractive index at center of core, R2 is the radius of the core, n clad is the refractive index of the cladding, and α is a free parameter whose value is in the range 1.7 to 2.2; an index step at R1 defined by a refractive index difference n a trench region extending radially from inner cladding, and an outer cladding region extending radially outward from the trench region.