Dispersion compensating fiber with reduced splice loss and methods for making same
AssigneeFitel USA Corp.
InventorsBent Edvold, Lars Gruner-Nielsen, Stig Nissen Knudsen, Torben Erik Veng
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Abstract
A dispersion compensating fiber is described having a core and cladding. The cladding has a first cladding region surrounding the core, a second cladding region surrounding the first cladding layer, and a third cladding region surrounding the second cladding layer. The core, and the first, second, and third cladding regions are doped to create a refraction index profile characteristic of dispersion compensating fiber. A portion of the cladding is doped with phosphorus, thereby resulting in splice loss reduction.
Claims12
A dispersion compensating fiber, comprising:
- a core,
- cladding, including a first cladding region surrounding the core, a second cladding region surrounding the first cladding layer, and a third cladding region surrounding the second cladding layer,
- the core, and the first, second, and third cladding regions being doped to create a refraction index profile characteristic of dispersion compensating fiber,
- a portion of the cladding being doped with phosphorus, thereby resulting in splice loss reduction.
A method for fabricating dispersion compensating fiber, comprising:
- (a) depositing a layer of intermediate cladding material onto an inner surface of a tube fabricated from an outer cladding material;
- (b) depositing a layer of inner cladding material onto the layer of intermediate cladding material;
- (c) depositing a layer of core material onto the layer of inner cladding material, the core and cladding materials being doped to create a refraction index profile characteristic of dispersion compensating fiber, a portion of the cladding being doped with phosphorus, thereby resulting in a reduction of splice loss;
- and
- (d) drawing the core and cladding materials into optical fiber.
Dependencies are inferred from the claim text.