Patent ID: 6542681
Filing Date: 2003-04-01
Classification: B82Y,G02B

Abstract:
An optical fibre with a waveguide structure having a longitudinal direction, said optical fibre having:a core region extending along the longitudinal direction, a cladding region extending along the longitudinal direction, said cladding region comprising at least 3 primary, elongated elements each having a centre axis extending in the longitudinal direction of the waveguide, each primary element having a refractive index being different from a refractive index of any material adjacent to the primary element, each primary element having a shape which, in a cross-section perpendicular to the longitudinal direction, deviates from a circular shape and having parts extending outside a circle having the same area as that of the primary element and having its centre at a centre of the primary element, at least one extending part of each primary element extending at least substantially in a predetermined direction.