Buffered large core fiber
AssigneeCorning Incorporated
InventorsSeldon David Benjamin, Kevin Wallace Bennett, Gregory Blake Bohler, Jeffrey Coon, Samuel Don Navé
Life of this patent
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Abstract
An optical fiber comprising: (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1; (ii) a cladding surrounding the core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1, the cladding comprising (a) fluorine doped silica with relative index of refraction delta <0, or (b) a polymer with relative index of refraction delta <0; (iii) a protective coating, the protective coating having a Young's modulus greater than 700 MPa, a thickness ≦15 μm, and an index of refraction index of refraction n3>n2; and (iv) a permanent buffer.
Claims36
An optical fiber comprising:
- (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1;
- (ii) a cladding surrounding said core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1;
- (iii) a protective coating, said protective coating having a Young's modulus greater than 700 MPa, a thickness ≦20 μm, and an index of refraction index of refraction n3>n2;
- and
- (iv) a buffer, surrounding the protective coating, wherein the adhesion between the buffer and the protective layer is sufficiently strong, such that a pull force of greater than 3.5 N is required to strip 15 mm+/−1.5 mm of buffer from the protective coating.
An optical fiber comprising:
- (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1;
- (ii) a cladding surrounding said core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1;
- (iii) a protective coating, said protective coating having a Young's modulus greater than 700 MPa, a thickness ≦15 μm, and an index of refraction index of refraction n3>n2;
- and
- (iv) a buffer, surrounding the protective coating, wherein said buffer does not include an inner layer with a Young's modulus of less than 25 MPa.
An optical fiber comprising:
- (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1;
- (ii) a cladding surrounding said core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1;
- (iii) a protective coating, said protective coating having a Young's modulus greater than 700 MPa, a thickness ≦15 μm, and an index of refraction index of refraction n3>n2;
- and
- (iv) a buffer, surrounding the protective coating, wherein said buffer is a single layer coating or a tube and has a shore D hardness of at least 60.
An optical fiber comprising:
- (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1;
- (ii) a cladding surrounding said core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1;
- (iii) a protective coating, said protective coating having a Young's modulus greater than 700 MPa, a thickness ≦15 μm, and an index of refraction index of refraction n3>n2;
- and
- (iv) a buffer, surrounding the protective coating,
- said cladding comprises (a) fluorine doped silica with relative index of refraction delta <0, or (b) a polymer with relative index of refraction delta <0;
- and
- said protective coating has a Shore D hardness and the shore D hardness of said protective coating is within +/−20 of the Shore D hardness of said cladding;
- and said buffer is a permanent buffer.
An optical fiber comprising:
- (i) a multi-mode silica based glass core, said core having a 80-300 μm diameter and an index of refraction n1;
- (ii) a cladding surrounding said core, said cladding having a thickness ≦20 μm and index of refraction index of refraction n2<n1;
- (iii) a protective coating, said protective coating having a Young's modulus greater than 700 MPa, a thickness ≦15 μm, and an index of refraction index of refraction n3>n2;
- and
- (iv) a buffer, surrounding the protective coating,
- wherein the shore D hardness each of said cladding, said protective coating, and said buffer is greater than 55.
Dependencies are inferred from the claim text.