Reduced Diameter Optical Fiber Splicing Compatibility
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Solution Overview
Problem
Current optical fibers, such as G657A2 and G657A1, face challenges in splicing capabilities with standard single-mode fibers like G652.D, particularly due to OTDR artifacts, and require improved macro-bending characteristics and reduced diameter designs for universal compatibility and flexibility.
Innovation Solution
The development of an optical fiber with a glass core, glass cladding, primary coating layer, and secondary coating layer, where the secondary coating layer has a modulus of at least 1.14 giga pascal, enabling seamless splicing with G657A2 bend-insensitive fibers and maintaining compatibility with G652.D fibers, while optimizing macro-bend performance and reducing diameter to enhance splicing convenience and power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the optical fibre diameter is reduced to improve flexibility and cable design, then the coating geometry parameters become more stringent and splicing capability deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the secondary coating layer's in-situ modulus to be greater than or equal to 1.14 giga pascal. This specific parameter adjustment allows the reduced diameter fibre (160-180 micrometers) to maintain both flexibility and splicing capability, resolving the contradiction between size reduction and splicing performance.
2Reliability
If G657A2 fibres are used to improve macro-bending characteristics, then bend performance is enhanced but OTDR artifacts occur during splicing with standard single mode fibres
Solution Approach 1:
The patent changes the parameter of secondary coating layer in-situ modulus to be greater than or equal to 1.14 giga pascal, which modifies the fibre's interaction with testing equipment. This parameter adjustment maintains the bend-insensitive properties of G657A2 while eliminating the harmful OTDR artifacts that occur during splicing with standard fibres.
3Ease of operation
If the optical fibre is designed with reduced diameter for universal splicing, then splicing convenience is improved but coating geometry precision requirements increase
Solution Approach 1:
By setting the secondary coating layer in-situ modulus to be greater than or equal to 1.14 giga pascal, the patent creates a coating structure that is more tolerant to geometric variations. This parameter change allows the reduced diameter fibre to achieve universal splicing convenience while reducing the stringency of coating geometry parameter requirements.
Data Source
AI summary
The present disclosure provides an optical fibre. The optical fibre includes a glass core, a glass cladding, a primary coating layer, and a secondary coating layer. The glass cladding surrounds the glass core. In addition, the primary coating layer sandwiched between the glass cladding and the secondary coating layer. Further, the secondary coating layer surrounds the primary coating layer. The primary coating layer has diameter of up to is in the range of 130 to 155 micrometers. Furthermore, the secondary coating layer has diameter in a range of about 160 micrometers to 180 micrometers. Moreover, diameter of the optical fibre is about 190 micrometers.