Reliability of Optical Fibres and Components: Final Report of COST 246 - Tapa blanda

Sinopsis

1. Introduction and General Information about COST and the COST 246 Action.- 1.1. COST Framework.- 1.2. Technical Description of COST 246 Action.- 1.3. Objectives.- 1.4. Working Groups, Study Groups and Their Tasks.- 1.5. Methods of Working.- 1.6. Meetings and Workshops.- 1.7. Dissemination of the Results and Achievements.- 1.7.1. Publications and Reports.- 1.7.2. Web Site.- 1.7.3. Scientific and Technical Cooperation.- 1.7.4. Transfer of Results.- 1.8. Economic Dimension.- 2. Reliability of Optical Fibres and Components.- 2.1. Introduction, Reliability.- 2.1.1. Reliability Function, Survival Probability.- 2.1.2. Failure Function, Failure Probability.- 2.1.3. Probability Density Function (Failure Probability per Unit Time).- 2.1.4. Failure Rate.- 2.1.5. Proof Test.- 2.1.6. Lifetime.- 2.1.7. Statistical Methods and Parameters.- 2.1.8. Time to Failure and between Failures.- 2.1.9. Mean Time to Repair.- 2.1.10. Network Reliability.- 2.2. How to Study Reliability and Estimate Lifetime of New Components.- 2.2.1. Performance Tests.- 2.2.2. Reliability Tests.- 2.3. Standards for Optical Fibre, Component and Network Reliability.- 2.3.1. Background.- 2.3.2. Standards Groups and Reliability.- 2.4. References.- Annex 2.A Impact of Fibre Lifetime on Network Reliability.- 3. Optical Fibres (WG1.1).- 3.1. Contributors.- 3.2. Introduction.- 3.2.1. Mechanical Reliability Studies on Fibres.- 3.2.2. Fibre Strength Distribution, Fatigue, Ageing and Lifetimes.- 3.2.3. Studies on Optical Transmission Aspects.- 3.3. Objectives.- 3.4. Working Methods.- 3.5. Output of WG1.1.- 3.5.1. Summary.- 3.5.2. Fibre Splicing, Connecting and Handling (e.g. for Passive Components and Fibre Bragg Gratings).- 3.5.3. "Pop-in" Phenomena.- 3.5.4. Service Conditions for Optical Fibres in US and Europe.- 3.5.5. Co-ordination with COST 239 and 241.- 3.6. Presentations at WG1.1 Meetings.- 3.6.1. Ageing of Fibres.- 3.6.2. Polarisation Mode Dispersion during Ageing.- 3.6.3. Smallest Allowable Bend Diameter.- 3.6.4. Mechanical Properties of Weak Spots.- 3.6.5. Coating Characterisation and Ageing Behaviour.- 3.7. Achievements and Conclusions.- 3.8. Prospects and Future Work.- Annex 3.A Strength Degradation of Lightguide Fibres in Room Temperature Water.- Annex 3.B Influence of the Coating in Mechanical Behaviour of Aged Optical Fibres.- 4. Handleability of Aged Fibres (WG1.1 SG1).- 4.1. Contributors.- 4.2. Introduction.- 4.3. Objectives.- 4.4. Working Methods.- 4.5. Output of SG1.- 4.6. Achievements and Conclusions.- 4.7. References.- Annex 4.A Handleability of Aged Optical Fibres.- 5. Ageing Tests (WG1.1 SG2).- 5.1. Contributors.- 5.2. Introduction.- 5.3. Objectives.- 5.4. Working Methods.- 5.5. Output of SG2.- 5.5.1. Summary.- 5.5.2. Results of the 1st Round Robin.- 5.5.3. Results of the 2nd Round Robin.- 5.5.4. Discussion on the Possible Standard Method.- 5.6. Presentations at SG2 Meetings.- 5.6.1. Fibre Ageing.- 5.6.2. Ageing Environment.- 5.6.3. Testing the Aged Fibres.- 5.7. Achievements and Conclusions.- 5.8. References.- Annex 5.A Effect of Water Quality and Quantity on Strength Degradation of Fused Silica Fibre in Water Tests.- Annex 5.B High-Temperature Ageing of Modern Polymer-Coated Optical Fibers.- 6. Fusion Splices Reliability(WG1.1 SG3).- 6.1. Contributors.- 6.2. Introduction.- 6.3. Objectives.- 6.4. Working Methods.- 6.5 Output of SG3.- 6.5.1. Summary.- 6.5.2. Questionnaire.- 6.6. Presentations at SG3 Meetings.- 6.6.1. Effect of Mechanical Stripping and Arc-Fusion on the Strength and Ageing of a Spliced Re-coated Optical Fibre (Annex 6.B).- 6.6.2. High Yield Fusion Splicing in the Outside Plant: Using Fibre Metlpack to Monitor Electrode Condition.- 6.6.3. Active Optical Monitoring of Spliced Ribbons during Fibre Retention testing: Apparent and Real Splice Strength..- 6.6.4. Measurements on 8-Fibre Ribbons and Fusion Splices (Annex 6.A).- 6.6.5. Mechanical Strength and Fatigue of Optical Fibre Fusion Splices.- 6.7. Achievements and Conclusions.- 6.9. References

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