Generic Requirements for Optical Fiber and Optical Fiber Cable

Transcription

1 Contents Generic Requirements for Optical Fiber and Optical Fiber Cable Contents Telcordia GR-20 - Documentation Information Preface... Preface 1 1. Introduction Purpose and Scope Target Audience Review/Concurrence Information Structure and Use of This Document Requirements Terminology Requirement Labeling Conventions Numbering of Requirement and Related Objects Requirement Object Identification References General Information General Product Description Characteristics of Optical Fiber Characteristics of Fiber Optic Units Characteristics of Fiber Optic Bundles Characteristics of Fiber Ribbons Characteristics of Fiber Optic Loose Buffer Tubes Characteristics of Optical Cable Classification of Optical Cables Safety Engineering of Optical Fiber Systems Upgrading to Meet Future Capacity Requirements Optical Fiber Compatibility Product Qualification Requirements Optical Fiber Product Qualification Fiber Ribbon Product Qualification Optical Fiber Cable Product Qualification Product Testing Requirements for Single-Mode Optical Fibers Fiber Materials Glass Composition Optical Requirements Attenuation Coefficient Point Discontinuities v

2 GR 20 CORE Contents Chromatic Dispersion Cutoff Wavelength Mode Field Diameter Fiber Macrobend Geometrical Requirements Mechanical Requirements Tensile Proof Strength Coating Strip Force Dynamic Tensile Strength Stress Corrosion Parameter Fiber Cleavability and Fusibility Fiber Cleavability Fiber Fusibility Requirements for Fiber Ribbons Geometrical Requirements Ribbon Structure Ribbon Dimensions Mechanical Requirements Resistance to Twist (Robustness) Ribbon Separation Ribbon Residual Twist (Flatness) Ribbon Strippability Requirements for Optical Cables Cable Construction Continuity of Metallic Members Cable Core Anti-buckling and Strength Elements Splicing Pulling Tension Spare Fibers in Cable Number of Fibers Per Unit/Binder Unit Stranding Spliced and Defective Fibers Ripcords Cable Marking, Packaging, and Shipping Cable Marking Cable Re-marking Identification Marking Cable Length and Length Markings Fiber and Unit Identification Packaging Shipping Cable Reel Cable Materials vi

3 Contents Filling Compound Material (If Used) Water-Blocking Material Filling and Water-Blocking Material Flow Cable Material Compatibility Jacket Requirements Jacket Material Cable Outer Diameter and Jacket Thickness Cable Jacket Yield Strength and Ultimate Elongation Cable Jacket Adherence Mechanical Requirements Optical Measurement Equipment Cable Testing Low and High Temperature Cable Bend Impact Resistance Compressive Strength Tensile Strength of Cable Cable Twist Cable Cyclic Flexing Cable Termination Environmental Requirements Optical Measurement Equipment In-Service Cable Performance - Environmental Testing Temperature Cycling Cable Aging Cable Freezing Color Permanence and Marking Durability Water Penetration Wasp Spray Exposure Hydrogen in Cables Electrical Protection Requirements Lightning Damage Susceptibility Current Carrying Capability of Metallic Members Cable Optical Requirements Attenuation Coefficient Point Discontinuities Appendix A: Gopher Resistance...A-1 References... References 1 Glossary...Glossary 1 Requirement-Object List... ROL 1 Requirement-Object Index... ROI 1 vii

4 GR 20 CORE Contents viii

5 List of Figures List of Figures Figures Figure 2-1. Cross Section: Generic Ribbon Cable Figure 2-2. Cross Section: Generic Loose Tube Cable Figure 2-3. Cross Section: Generic Fiber Bundle Cable Figure 5-1. Illustration of the Measurement Method using a Microscope Figure 5-2. Ribbon Separation Figure 6-1. Wasp Spray Exposure Test Configuration ix

6 GR 20 CORE List of Figures x

7 List of Tables List of Tables Tables Table 6-1. Mandrel Sizes for Chemical Exposure Test Table 6-2. Lightning-damage Categories Table A-1. Damage Index Rating for Gopher Resistance...A-1 xi