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US 8,412,015 B2Granted
Segmented gain-doping of an optical fiber
AssigneeOFS Fitel, LLC
InventorsDavid J Digiovanni, Siddharth Ramachandran, Samir Ghalmi, Marc Mermelstein
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Abstract
The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved.
Claims15
An optical fiber, comprising:
- a core having a first index of refraction;
- an inner cladding located radially-exterior to the core, the inner cladding having a second index of refraction, the second index of refraction being less than the first index of refraction;
- gain-dopants doping the inner cladding at predefined locations, the predefined locations corresponding to an intensity profile of a higher-order mode (HOM) signal;
- and
- a trench located radially-exterior to the inner cladding, the trench having a third index of refraction, the third index of refraction being less than the second index of refraction.
2 more elements
An optical fiber, comprising:
- a core;
- an inner cladding located radially-exterior to the core;
- and
- gain-dopants doping the inner cladding at predefined locations, the predefined locations corresponding to a peak in an intensity profile of a higher-order mode (HOM) signal.
1 more element
An optical fiber, comprising;
- a core;
- an inner cladding located radially-exterior to the core;
- gain-dopants doping the inner cladding at predefined locations, the predefined locations corresponding to an intensity profile of a higher-order mode (HOM) signal;
- and
- a trench located radially-exterior to the inner cladding, the trench having an index of refraction that is less than the index of refraction of the inner cladding.
2 more elements
Dependencies are inferred from the claim text.