Back to results
US 7,313,312 B2Granted
Optical fiber and method for making such fiber
AssigneeCorning Incorporated
InventorsRonald L. Kimball, Robert A Knowlton, Joseph E McCarthy, Ji Wang, Donnell T. Walton, Luis A. Zenteno
Life of this patent
Estimating the term…
Abstract
According to one example of the invention an optical fiber comprises: (i) silica based, rare earth doped core having a first index of refraction n1; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2; wherein at least one of the core or cladding is doped with Al2O3, such that the ratio of max wt % to min wt % of Al2O3 concentration is less than 2:1.
Claims20
An optical fiber comprising:
- (i) a silica based, rare earth doped core having a first index of refraction n1;
- (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2;
- wherein at least one of the core or cladding is doped with Al2O3, such that the ratio of max wt % to min wt % of Al2O3 concentration in said core or cladding is less than 1.5:1.
An optical fiber comprising:
- (i) a silica based, rare earth doped core having a first index of refraction n1;
- (ii) at least one silica based layer surrounding the core and having a second index of refraction n2, such that n1>n2;
- wherein said layer includes in weight percent:
- F
- 0.5 to 5
- wt %;
- and
- B
- 0.5 to 20
- wt %.
7 more elements
An optical fiber comprising:
- silica based, rare earth doped core having a first index of refraction n1;
- at least one silica based layer surrounding the core and having a second index of refraction n2, such that n1>n2;
- wherein said layer includes in weight percent:
- Boron—at least 8 wt %, and Fluorine—at least 2 wt %.
1 more element
Dependencies are inferred from the claim text.