Patent ID: 9507084
Filing Date: 2016-11-29
CPC Classification: G02B

Claim Text:
1. A bend-compensated LMA optical fiber comprising: a core region having a longitudinal axis, a refractive index n a cladding region surrounding said core region, said core and cladding regions configured to support and guide the propagation of signal light at a predetermined wavelength λ in a fundamental transverse mode in said core region in the direction of said axis, wherein the effective mode area of said LMA fiber is at least 300λ said fiber being characterized by a transverse cross-section that is further characterized by a refractive index profile, said cladding region including an inner cladding region surrounding said core region and an outer cladding region having a refractive index n at least a longitudinal segment of said fiber that, when bent or coiled to a bend radius R at least said longitudinal segment being pre-compensated in that (i) said index profile is approximately azimuthally symmetric with respect to said axis and (ii) the refractive index of at least said transverse portion is configured to compensate for said change associated with said fiber being bent or coiled.