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US 2014/0193127 A1Published application
Triple-sheathed monomode optical fiber
AssigneesUniversite De Limoges, CNRS - Centre National de Recherche Scientifique
InventorsPhilippe Roy, Kay Schuster, Stephan Grimm
Life of this patent
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Abstract
According to the invention, the intermediate sheath (13) is formed by assembling longitudinal elements (13A) and includes: a first optical material, the refractive index of which differs from the refractive index of the monomode core by at most 10−3; and a second optical material, the refractive index of which is lower than the refractive index of said monomode core and differs therefrom by at least 10−3.
Claims11
Monomode optical fiber (11, 21, 31) comprising, from center to periphery:
- a monomode core (12, 22, 32) doped at least partly with a rare earth,
- an optically inactive intermediate sheath (13, 23, 33),
- a multimode pumping sheath (14, 24, 34), and
- an outer sheath (15, 25, 35),
- wherein the intermediate sheath (13, 23, 33)
- is formed by assembling longitudinal elements (13A, 23A, 33A and 33B), and
- comprises a first optical material with a refractive index that differs from the refractive index of said monomode core by at most 10−3, and a second optical material with a refractive index that differs from the refractive index of said monomode core by at least 10−3.
4 more elements
Dependencies are inferred from the claim text.