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US 7,463,805 B2Granted
High numerical aperture optical fiber
AssigneeCorning Incorporated
InventorsMing-Jun Li, Ji Wang, Luis Alberto Zenteno
Life of this patent
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Abstract
An optical fiber, comprising: a core with a first refractive index (n1); a silica based outer cladding surrounding the core, the outer cladding having a refractive index (n), such that the core is substantially surrounded by a gap situated between the core and the outer cladding, the gap containing at least one support structure adjacent to the outer cladding and situated between the outer cladding and the core, wherein the support structure is either hollow or gas filed and is not connected to any other support structure situated within the gap.
Claims20
An optical fiber, comprising:
- a rare earth doped core with a first refractive index (n1);
- a silica based inner cladding abutting and at least substantially surrounding said core of said fiber, said inner cladding having a refractive index n2, wherein n2<n1;
- a silica based outer cladding surrounding said inner cladding, the outer cladding having a fourth refractive index (n4), said outer cladding and said inner cladding defining a space having the refractive index n3 of about 1, so n3<n2 and n3<n4 and said space substantially encloses said inner cladding;
- and
- at least one support structure situated between said outer cladding and said inner cladding of said fiber, wherein said support structure of said fiber is either hollow or gas filed and is not connected to any other support structure of said fiber.
2 more elements
An optical fiber, comprising:
- a rare earth doped core with a first refractive index (n1);
- a silica based inner cladding abutting and at least substantially surrounding said core, said inner cladding having a refractive index n2, wherein n2<n1;
- a silica based outer cladding surrounding said inner cladding, the outer cladding having a fourth refractive index (n4), said outer cladding and said inner cladding defining a space having the refractive index n3 of about 1, so n3<n2 and n3<n4 and said space substantially encloses said inner cladding;
- and
- at least one support structure situated between said outer cladding and said inner cladding, wherein said support structure is either hollow or gas filed and is not connected to any other support structure, wherein the optical fiber exhibits single polarization at the operating wavelength band.
2 more elements
An optical fiber, comprising:
- a rare earth doped core with a first refractive index (n1);
- a silica based inner cladding abutting and at least substantially surrounding said core, said inner cladding having a refractive index n2, wherein n2<n1;
- a silica based outer cladding surrounding said inner cladding, the outer cladding having a fourth refractive index (n4), said outer cladding and said inner cladding defining a space having the refractive index n3 of about 1, so n3<n2 and n3<n4 and said space substantially encloses said inner cladding;
- and
- at least one support structure situated between said outer cladding and said inner cladding, wherein said support structure is either hollow or gas filed and is not connected to any other support structure wherein said fiber exhibits (i) single polarization within a single polarization band with the bandwidth is at least 10 nm and (ii) has inner cladding numerical aperture NA=1.
2 more elements
An optical fiber, comprising:
- a core with a first refractive index (n1);
- a silica based outer cladding surrounding said core of said fiber, the outer cladding having a refractive index (n), such that the core is substantially surrounded by a gap situated between the core and the outer cladding, said gap containing at least one support structure adjacent to said outer cladding and situated between said outer cladding and said core, wherein said support structure is (i) either hollow or gas filed and (ii) not in contact, nor connected to any other support structure situated within said gap.
An optical fiber, comprising:
- a core with a first refractive index (n1);
- a silica based outer cladding surrounding said core of said fiber, the outer cladding of said fiber having a refractive index (n), such that the core of said fiber is substantially surrounded by a gap situated between the core and the outer cladding, said gap containing at least one support structure adjacent to said outer cladding and situated between said outer cladding and said core, wherein said support structure is (i) either hollow or gas filed and (ii) not connected to any other support structure situated within said gap;
- a silica based inner cladding abutting and at least substantially surrounding said core, said inner cladding having a refractive index n2, wherein n2<n1;
- wherein said a silica based outer cladding is surrounding said inner cladding, said outer cladding and said inner cladding defining a fiber space having the refractive index n3 of about 1, so n3<n2 and n3<n4 and said space substantially encloses said inner cladding;
- and
- a plurality of support structures situated between said outer cladding of said fiber and said inner cladding of said fiber, wherein said support structures of said fiber are either hollow or gas filed and wherein at least one of said support structures is not connected to other support structures of said fiber, and at least two of said support structures of said fiber were separated by a distance larger than the width of each of said support structures.
3 more elements
Dependencies are inferred from the claim text.