TRIPLE-SHEATHED MONOMODE OPTICAL FIBER
First Claim
Patent Images
1. 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), andan outer sheath (15, 25, 35),wherein the intermediate sheath (13, 23, 33)is formed by assembling longitudinal elements (13A, 23A, 33A and 33B), andcomprises 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.
1 Assignment
0 Petitions
Accused Products
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.
2 Citations
11 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification