Corning Incorporated
Wideband multimode co-doped optical fiber employing GeO.sub.2 and Al.sub.2O.sub.3 dopants

Abstract:

The wideband multimode co-doped optical fiber has a silica core co-doped with GeO.sub.2 and Al.sub.2O.sub.3. The GeO.sub.2 concentration is maximum at the fiber centerline and monotonically decreases radially out to the core radius. The Al.sub.2O.sub.3 concentration is minimum at the centerline and monotonically increases radially out to maximum concentration at the core radius. The cladding has an inner cladding region of relative refractive index .DELTA.2, an intermediate cladding region having a relative refractive index .DELTA.3, and an outer cladding region having a relative refractive index .DELTA.4, wherein .DELTA.3<.DELTA.2, .DELTA.4. The optical fiber has a bandwidth BW.gtoreq.5 GHzkm with a peak wavelength .lamda..sub.P within a wavelength range of 800 nm to 1200 nm and over a wavelength band .DELTA..lamda. of at least 100 nm.