High SBS threshold optical fiber
AssigneeCorning Incorporated
InventorsXin Chen, Ming-Jun Li, Donnell Thaddeus Walton, Luis Alberto Zenteno
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Abstract
An optical waveguide fiber having a high threshold for stimulated Brillouin scattering. According to some embodiments of the invention, the optical fiber comprises: (a) a rare earth doped core having a refractive index profile and a centerline, the core including at least two adjacent core regions including different amounts of updopants, such that the longitudinal acoustic field velocities within the two core regions differ by at least 0.2%; and (b) a cladding layer surrounding and directly adjacent the core. The said fiber has MFD of greater than 12 μm and delta % difference between the peak core delta and the cladding of less than 0.3%.
Claims15
An optical fiber comprising:
- a rare earth doped core having a refractive index profile and a centerline, the core including at least two adjacent core regions including different amounts of updopants, such that the longitudinal acoustic velocities within the two core regions differ by at least 0.2%;
- and a cladding layer surrounding and directly adjacent the core, said fiber having (a) MFD of greater than 12 μm and (b) delta % difference between the peak core delta and the cladding of less than 0.3%.
An optical fiber comprising:
- a Ge doped core having a refractive index profile and a centerline, the core comprising a first region having an acoustic Δ1 and a second region directly adjacent the first region and having an acoustic Δ2 wherein Δ1 does not equal to Δ2, said two regions having a different average refractive index and the width or radius of the region with a lower refractive index is at list 1 μm
- wherein the optical fiber has an attenuation at 1550 nm;
- wherein the refractive index of the core is selected to provide an overlap integral less than 0.8 at 1550 nm.
Dependencies are inferred from the claim text.