Plastics packaged optical fibres
First Claim
1. A plastics packaged glass optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resin having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
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Accused Products
Abstract
A design of plastics packaged glass optical fibre in which the plastics packaging consists of a urethane acrylate primary coating, a silicone rubber secondary coating and a nylon tertiary coating, the three coatings coacting to provide a pair of substantially decoupled mechanical filters.
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Citations
10 Claims
- 1. A plastics packaged glass optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resin having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
- 8. An optical fibre cable incorporating at least one plastics packaged optical fibre which contains an optical waveguiding structure within the glass, wherein the plastics packaging consists of primary, secondary and tertiary coating layers of relatively high, relatively low and relatively high modulus respectively, wherein the primary coating layer is a UV curable resign having a modulus in the range 5 to a few hundred MPa and a thickness of at least 30 microns, wherein the secondary coating layer has a modulus at least two orders of magnitude smaller than that of the primary coating, and a thickness of at least 50 microns, and wherein the tertiary coating has a modulus in the range 400 to 3000 MPa and a thickness of at least 40 microns.
Specification