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1 Perspectives on Lightwave Communications |
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1 | (30) |
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1.1 Reasons for Fiber Optic Communications |
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3 | (2) |
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1.1.1 The Road to Optical Networks |
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3 | (1) |
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1.1.2 Benefits of Using Optical Fibers |
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4 | (1) |
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1.2 Optical Wavelength Bands |
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5 | (5) |
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1.2.1 Electromagnetic Energy Spectrum |
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5 | (3) |
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1.2.2 Optical Windows and Spectral Bands |
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8 | (2) |
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10 | (4) |
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1.4 Digital Multiplexing Techniques |
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14 | (3) |
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1.4.1 Basic Telecom Signal Multiplexing |
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14 | (2) |
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1.4.2 Multiplexing Hierarchy in SONET/SDH |
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16 | (1) |
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1.4.3 Optical Transport Network (OTN) |
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17 | (1) |
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1.5 Multiplexing of Wavelength Channels |
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17 | (2) |
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18 | (1) |
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1.5.2 Polarization Division Multiplexing |
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19 | (1) |
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1.5.3 Optical Fibers with Multiple Cores |
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19 | (1) |
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1.6 Basic Elements of Optical Fiber Systems |
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19 | (4) |
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1.7 Evolution of Fiber Optic Networks |
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23 | (2) |
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1.8 Standards for Fiber Optic Communications |
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25 | (1) |
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25 | (4) |
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29 | (2) |
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2 Optical Fiber Structures and Light Guiding Principles |
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31 | (62) |
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32 | (8) |
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33 | (1) |
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2.1.2 Linear Polarization |
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34 | (2) |
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2.1.3 Elliptical Polarization and Circular Polarization |
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36 | (3) |
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2.1.4 Quantum Aspects of Light |
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39 | (1) |
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2.2 Basic Laws and Definitions of Optics |
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40 | (8) |
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2.2.1 Concept of Refractive Index |
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40 | (1) |
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2.2.2 Basis of Reflection and Refraction |
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40 | (4) |
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2.2.3 Polarization Characteristics of Light |
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44 | (2) |
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2.2.4 Polarization-Sensitive Devices |
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46 | (2) |
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2.3 Optical Fiber Configurations and Modes |
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48 | (10) |
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2.3.1 Conventional Fiber Types |
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48 | (3) |
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2.3.2 Concepts of Rays and Modes |
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51 | (1) |
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2.3.3 Structure of Step-Index Fibers |
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52 | (1) |
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2.3.4 Ray Optics Representation |
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52 | (3) |
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2.3.5 Lightwaves in a Dielectric Slab Waveguide |
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55 | (3) |
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2.4 Modes in Circular Waveguides |
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58 | (7) |
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2.4.1 Basic Modal Concepts |
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58 | (2) |
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2.4.2 Cutoff Wavelength and V Number |
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60 | (2) |
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2.4.3 Optical Power in Step-Index Fibers |
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62 | (1) |
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2.4.4 Linearly Polarized Modes |
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63 | (2) |
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65 | (5) |
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65 | (1) |
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2.5.2 Definition of Mode-Field Diameter |
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66 | (2) |
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2.5.3 Origin of Birefringence |
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68 | (2) |
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2.5.4 Effective Refractive Index |
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70 | (1) |
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2.6 Graded-Index (GI) Fibers |
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70 | (3) |
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2.6.1 Core Structure of GI Fibers |
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70 | (1) |
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2.6.2 GI Fiber Numerical Aperture |
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71 | (1) |
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2.6.3 Cutoff Condition in GI Fibers |
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72 | (1) |
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2.7 Optical Fiber Materials |
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73 | (3) |
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2.7.1 Glass Optical Fibers |
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73 | (2) |
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2.7.2 Standard Fiber Fabrication |
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75 | (1) |
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2.7.3 Active Glass Optical Fibers |
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76 | (1) |
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2.7.4 Plastic Optical Fibers |
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76 | (1) |
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2.8 Photonic Crystal Fiber Concepts |
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76 | (3) |
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77 | (1) |
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2.8.2 Photonic Bandgap Fiber |
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78 | (1) |
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79 | (6) |
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2.9.1 Fiber Optic Cable Structures |
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80 | (3) |
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2.9.2 Designs of Indoor Optical Cables |
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83 | (1) |
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2.9.3 Designs of Outdoor Optical Cables |
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83 | (2) |
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85 | (1) |
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Appendix: The Fresnel Equations |
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86 | (4) |
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90 | (3) |
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3 Optical Signal Attenuation and Dispersion |
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93 | (54) |
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94 | (13) |
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3.1.1 Units for Fiber Attenuation |
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94 | (2) |
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3.1.2 Absorption of Optical Power |
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96 | (5) |
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3.1.3 Scattering Losses in Optical Fibers |
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101 | (2) |
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3.1.4 Fiber Bending Losses |
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103 | (2) |
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3.1.5 Core and Cladding Propagation Losses |
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105 | (2) |
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3.2 Optical Signal Dispersion Effects |
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107 | (15) |
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3.2.1 Origins of Signal Dispersion |
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108 | (2) |
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3.2.2 Modal Delay Effects |
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110 | (3) |
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3.2.3 Factors Contributing to Dispersion |
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113 | (1) |
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3.2.4 Group Delay Results |
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114 | (2) |
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3.2.5 Material-Induced Dispersion |
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116 | (2) |
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3.2.6 Effects of Waveguide Dispersion |
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118 | (1) |
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3.2.7 Dispersion Behavior in Single-Mode Fibers |
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119 | (1) |
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3.2.8 Origin of Polarization-Mode Dispersion |
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120 | (2) |
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3.3 Design and Characteristics of SMFs |
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122 | (9) |
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3.3.1 Tailoring of Refractive Index Profiles |
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123 | (2) |
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3.3.2 Concept of Cutoff Wavelength |
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125 | (2) |
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3.3.3 Standards for Dispersion Calculations |
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127 | (3) |
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3.3.4 Definition of Mode-Field Diameter |
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130 | (1) |
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3.3.5 Bending Loss in Single-Mode Fibers |
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130 | (1) |
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3.4 ITU-T Standards for Fibers |
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131 | (5) |
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3.4.1 Recommendation G.651.1 |
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132 | (1) |
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3.4.2 Recommendation G.652 |
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133 | (1) |
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3.4.3 Recommendation G.653 |
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134 | (1) |
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3.4.4 Recommendation G.654 |
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134 | (1) |
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3.4.5 Recommendation G.655 |
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135 | (1) |
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3.4.6 Recommendation G.656 |
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135 | (1) |
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3.4.7 Recommendation G.657 |
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135 | (1) |
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3.5 Designs and Use of Specialty Fibers |
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136 | (3) |
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3.6 Character of Multicore Optical Fibers |
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139 | (1) |
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140 | (4) |
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144 | (3) |
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4 Light Sources for Fiber Links |
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147 | (62) |
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4.1 Basic Concepts of Semiconductor Physics |
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148 | (10) |
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4.1.1 Semiconductor Energy Bands |
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149 | (4) |
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4.1.2 Intrinsic and Extrinsic Materials |
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153 | (1) |
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4.1.3 Concept of a pn Junction |
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154 | (2) |
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4.1.4 Direct Bandgap and Indirect Bandgap |
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156 | (1) |
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4.1.5 Fabrication of Semiconductor Devices |
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156 | (2) |
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4.2 Principles of Light-Emitting Diodes (LEDs) |
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158 | (14) |
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158 | (3) |
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4.2.2 Semiconductor Materials for Light Sources |
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161 | (5) |
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4.2.3 LED Quantum Efficiency and Output Power |
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166 | (4) |
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4.2.4 Response Time of an LED |
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170 | (2) |
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4.3 Principles of Laser Diodes |
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172 | (27) |
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4.3.1 Modes and Threshold Conditions in Laser Diodes |
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173 | (8) |
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4.3.2 Laser Diode Rate Equations |
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181 | (2) |
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4.3.3 External Differential Quantum Efficiency |
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183 | (1) |
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4.3.4 Laser Resonant Frequencies |
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183 | (3) |
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4.3.5 Structures and Radiation Patterns of Laser Diodes |
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186 | (2) |
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4.3.6 Lasers Operating in a Single Mode |
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188 | (3) |
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4.3.7 Modulation of Laser Diodes |
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191 | (2) |
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4.3.8 Laser Output Spectral Width |
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193 | (1) |
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4.3.9 External Laser Light Modulation |
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194 | (2) |
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4.3.10 Lasing Threshold Temperature Effects |
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196 | (3) |
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4.4 Output Linearity of Light Sources |
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199 | (2) |
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201 | (6) |
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207 | (2) |
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209 | (32) |
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5.1 Source-to-Fiber Power Coupling |
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210 | (10) |
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5.1.1 Light Source Emission Patterns |
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210 | (2) |
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5.1.2 Calculation of Power Coupling |
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212 | (6) |
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5.1.3 Optical Coupling Versus Wavelength |
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218 | (1) |
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5.1.4 Equilibrium Numerical Aperture |
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219 | (1) |
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5.2 Coupling Improvement with Lensing Schemes |
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220 | (3) |
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5.3 Losses Between Fiber Joints |
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223 | (13) |
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5.3.1 Mechanical Misalignment Effects |
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226 | (6) |
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5.3.2 Fiber Variation Losses |
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232 | (2) |
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5.3.3 Single-Mode Fiber Losses |
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234 | (1) |
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5.3.4 Preparation of Fiber End Faces |
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235 | (1) |
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236 | (3) |
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239 | (2) |
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241 | (26) |
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6.1 Operation of Photodiodes |
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242 | (8) |
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6.1.1 The pin Photodetector |
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242 | (7) |
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6.1.2 Basics of Avalanche Photodiodes |
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249 | (1) |
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6.2 Noise Effects in Photodetectors |
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250 | (7) |
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6.2.1 Signal-to-Noise Ratio |
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250 | (1) |
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6.2.2 Sources of Photodetector Noise |
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251 | (3) |
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6.2.3 Signal-to-Noise Ratio Limits |
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254 | (2) |
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6.2.4 Noise-Equivalent Power and Detectivity |
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256 | (1) |
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6.3 Response Times of Photodiodes |
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257 | (5) |
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6.3.1 Photocurrent in the Depletion Layer |
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257 | (2) |
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6.3.2 Response Time Characteristics |
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259 | (3) |
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6.4 Comparisons of Photodetectors |
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262 | (1) |
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263 | (3) |
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266 | (1) |
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7 Optical Receiver Operation |
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267 | (36) |
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7.1 Basic Receiver Operation |
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268 | (8) |
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7.1.1 Transmitting Digital Signals |
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269 | (1) |
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7.1.2 Sources of Detection Errors |
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270 | (4) |
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7.1.3 Receiver Front-End Amplifiers |
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274 | (2) |
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7.2 Performance Characteristics of Digital Receivers |
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276 | (11) |
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7.2.1 Determining Probability of Error |
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276 | (6) |
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7.2.2 Specifying Receiver Sensitivity |
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282 | (3) |
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7.2.3 The Basic Quantum Limit |
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285 | (2) |
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7.3 Principles of Eye Diagrams |
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287 | (4) |
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7.3.1 Features of Eye Patterns |
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287 | (3) |
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7.3.2 BER and Q-Factor Measurements |
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290 | (1) |
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291 | (3) |
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7.5 Characteristics of Analog Receivers |
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294 | (4) |
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298 | (3) |
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301 | (2) |
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8 Digital Optical Fiber Links |
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303 | (60) |
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8.1 Basic Optical Fiber Links |
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304 | (18) |
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8.1.1 Signal Formats for Transporting Information |
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306 | (2) |
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8.1.2 Considerations for Designing Links |
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308 | (1) |
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8.1.3 Creating a Link Power Budget |
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309 | (5) |
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8.1.4 Formulating a Rise-Time Budget |
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314 | (5) |
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8.1.5 Transmission at Short Wavelengths |
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319 | (1) |
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8.1.6 Attenuation Limits for SMF Links |
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320 | (2) |
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8.2 Concepts of Link Power Penalties |
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322 | (11) |
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8.2.1 Power Penalties from Chromatic Dispersion |
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322 | (3) |
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8.2.2 Power Penalties Arising from PMD |
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325 | (1) |
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8.2.3 Extinction Ratio Power Penalties |
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326 | (1) |
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8.2.4 Modal Noise Power Penalties |
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327 | (1) |
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8.2.5 Power Penalties Due to Mode-Partition Noise |
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328 | (2) |
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8.2.6 Chirping-Induced Power Penalties |
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330 | (1) |
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8.2.7 Link Instabilities from Reflection Noise |
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331 | (2) |
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8.3 Detection and Control of Errors |
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333 | (7) |
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8.3.1 Concept of Error Detection |
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334 | (1) |
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8.3.2 Codes Used for Linear Error Detection |
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335 | (1) |
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8.3.3 Error Detection with Polynomial Codes |
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335 | (4) |
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8.3.4 Using Redundant Bits for Error Correction |
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339 | (1) |
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8.4 Coherent Detection Schemes |
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340 | (12) |
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8.4.1 Fundamental Concepts |
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341 | (2) |
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343 | (1) |
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8.4.3 Heterodyne Detection |
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344 | (1) |
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8.4.4 SNR in Coherent Detection |
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344 | (2) |
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8.4.5 BER Comparisons in Coherent Detection |
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346 | (6) |
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8.5 Higher-Order Signal Modulation Formats |
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352 | (3) |
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8.5.1 Concept of Spectral Efficiency |
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352 | (1) |
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8.5.2 Phase Shift Keying or IQ Modulation |
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352 | (1) |
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8.5.3 Differential Quadrature Phase-Shift Keying |
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353 | (1) |
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8.5.4 Quadrature Amplitude Modulation (QAM) |
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354 | (1) |
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355 | (6) |
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361 | (2) |
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9 Analog Optical Fiber Channels |
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363 | (20) |
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9.1 Basic Elements of Analog Links |
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364 | (1) |
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9.2 Concept of Carrier-to-Noise Ratio |
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365 | (6) |
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366 | (1) |
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9.2.2 Photodetector and Preamplifier Noises |
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367 | (1) |
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9.2.3 Effects of Relative Intensity Noise (RIN) |
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368 | (1) |
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9.2.4 Limiting C/N Conditions |
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369 | (2) |
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9.3 Multichannel Amplitude Modulation |
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371 | (3) |
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9.4 Spurious-Free Dynamic Range |
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374 | (2) |
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9.5 Radio-Over-Fiber Links |
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376 | (1) |
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377 | (1) |
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378 | (3) |
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381 | (2) |
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10 Wavelength Division Multiplexing (WDM) |
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383 | (54) |
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384 | (5) |
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10.1.1 WDM Operational Principles |
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384 | (3) |
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387 | (2) |
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10.2 Passive Optical Couplers |
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389 | (20) |
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10.2.1 The 2 × 2 Fiber Coupler |
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390 | (6) |
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10.2.2 Scattering Matrix Analyses of Couplers |
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396 | (2) |
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10.2.3 Basis of the 2 × 2 Waveguide Coupler |
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398 | (4) |
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10.2.4 Principal Role of Star Couplers |
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402 | (3) |
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10.2.5 Mach-Zehnder Interferometry Techniques |
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405 | (4) |
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10.3 Nonreciprocal Isolators and Circulators |
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409 | (3) |
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10.3.1 Functions of Optical Isolators |
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409 | (2) |
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10.3.2 Characteristics of Optical Circulators |
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411 | (1) |
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10.4 WDM Devices Based on Grating Principles |
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412 | (6) |
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412 | (1) |
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10.4.2 Optical Fiber Bragg Grating (FBG) |
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413 | (3) |
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10.4.3 WDM FBG Applications |
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416 | (2) |
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10.5 Dielectric Thin-Film Filter (TFF) |
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418 | (5) |
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10.5.1 Applications of Etalon Theory |
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419 | (3) |
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10.5.2 TFF Applications to WDM Links |
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422 | (1) |
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10.6 Arrayed Waveguide Devices |
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423 | (5) |
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10.7 WDM Applications of Diffraction Gratings |
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428 | (2) |
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430 | (4) |
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434 | (3) |
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11 Basics of Optical Amplifiers |
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437 | (40) |
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11.1 Fundamental Optical Amplifier Types |
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438 | (3) |
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11.1.1 General Applications of Optical Amplifiers |
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438 | (2) |
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11.1.2 Amplifier Classifications |
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440 | (1) |
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11.2 Semiconductor Optical Amplifiers |
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441 | (7) |
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11.2.1 External Pumping of Active Medium |
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442 | (3) |
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11.2.2 Amplifier Signal Gain |
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445 | (2) |
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447 | (1) |
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11.3 Erbium-Doped Fiber Amplifiers |
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448 | (7) |
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11.3.1 Basics of Fiber Amplifier Pumping |
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448 | (3) |
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11.3.2 Construction of an EDFA |
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451 | (1) |
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11.3.3 EDFA Power-Conversion Efficiency and Gain |
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452 | (3) |
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11.4 Noises Generated in Optical Amplifiers |
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455 | (3) |
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11.5 Optical Signal-To-Noise Ratio (OSNR) |
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458 | (2) |
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11.6 Fiber Link Applications |
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460 | (4) |
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11.6.1 Power Amplifier Functions |
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460 | (1) |
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11.6.2 Use of In-Line Amplifiers |
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461 | (2) |
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11.6.3 Optical Amplifier as a Preamplifier |
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463 | (1) |
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11.7 Raman Optical Amplifiers |
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464 | (3) |
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11.7.1 Principle of Raman Gain |
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464 | (2) |
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11.7.2 Pump Lasers for Raman Amplifiers |
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466 | (1) |
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11.8 Multiband Optical Amplifiers |
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467 | (1) |
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11.9 Overview of Optical Fiber Lasers |
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468 | (2) |
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470 | (4) |
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474 | (3) |
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12 Nonlinear Processes in Optical Fibers |
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477 | (30) |
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12.1 Classifications of Nonlinearities |
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478 | (1) |
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12.2 Effective Length and Effective Area |
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479 | (2) |
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12.3 Stimulated Raman Scattering |
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481 | (3) |
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12.4 Stimulated Brillouin Scattering |
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484 | (2) |
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12.5 Self-Phase Modulation |
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486 | (2) |
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12.6 Cross-Phase Modulation in WDM Systems |
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488 | (1) |
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12.7 Four-Wave Mixing in WDM Channels |
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489 | (2) |
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12.8 Mitigation Schemes for FWM |
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491 | (1) |
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12.9 Basic Optical Wavelength Converters |
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492 | (3) |
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12.9.1 Wavelength Converters Using Optical Gatings |
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493 | (1) |
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12.9.2 Wavelength Converters Based on Wave-Mixing |
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494 | (1) |
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12.10 Principles of Solitons |
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495 | (8) |
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12.10.1 Structures of Soliton Pulses |
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495 | (4) |
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12.10.2 Fundamental Parameters for Solitons |
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499 | (2) |
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12.10.3 Width and Spacing of Soliton Pulses |
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501 | (2) |
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503 | (2) |
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505 | (2) |
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13 Fiber Optic Communication Networks |
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507 | (70) |
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13.1 Concepts of Optical Networks |
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508 | (6) |
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13.1.1 Terminology Used for Networks |
|
|
508 | (1) |
|
13.1.2 Generic Network Categories |
|
|
509 | (3) |
|
13.1.3 Layered Structure Approach to Network Architectures |
|
|
512 | (2) |
|
13.1.4 Optical Layer Functions |
|
|
514 | (1) |
|
13.2 Common Network Topologies |
|
|
514 | (5) |
|
13.2.1 Performance of Passive Linear Buses |
|
|
516 | (1) |
|
13.2.2 Performance of Star Networks |
|
|
517 | (2) |
|
13.3 Basic SONET/SDH Concepts |
|
|
519 | (10) |
|
13.3.1 SONET/SDH Frame Formats and Speeds |
|
|
519 | (3) |
|
13.3.2 Optical Interfaces in SONET/SDH |
|
|
522 | (2) |
|
|
524 | (3) |
|
13.3.4 SONET/SDH Network Architectures |
|
|
527 | (2) |
|
13.4 High-Speed Lightwave Transceivers |
|
|
529 | (6) |
|
13.4.1 Links Operating at 10 Gb/s |
|
|
530 | (3) |
|
13.4.2 Transceivers for 40 Gb/s Links |
|
|
533 | (1) |
|
13.4.3 Transceivers for 100 Gb/s Links |
|
|
534 | (1) |
|
13.4.4 Links Operating at 400 Gb/s and Higher |
|
|
535 | (1) |
|
13.5 Schemes for Optical Add/Drop Multiplexing |
|
|
535 | (7) |
|
13.5.1 Configurations of OADM Equipment |
|
|
536 | (1) |
|
13.5.2 Reconfiguring OADM Equipment |
|
|
537 | (5) |
|
13.6 Optical Switching Architectures |
|
|
542 | (10) |
|
13.6.1 Concept of an Optical CrossConnect |
|
|
543 | (2) |
|
13.6.2 Considerations for Wavelength Conversion |
|
|
545 | (2) |
|
13.6.3 Methodologies for Wavelength Routing |
|
|
547 | (1) |
|
13.6.4 Optical Packet Switching |
|
|
548 | (1) |
|
13.6.5 Optical Burst Switching |
|
|
549 | (2) |
|
13.6.6 Elastic Optical Networks |
|
|
551 | (1) |
|
13.7 WDM Network Implementations |
|
|
552 | (4) |
|
13.7.1 Long-Distance WDM Networks |
|
|
552 | (2) |
|
13.7.2 Metro WDM Networks |
|
|
554 | (1) |
|
13.7.3 Data Center Networks |
|
|
555 | (1) |
|
13.8 Passive Optical Networks |
|
|
556 | (10) |
|
13.8.1 Basic Architectures for PONs |
|
|
557 | (2) |
|
13.8.2 Active PON Modules |
|
|
559 | (2) |
|
13.8.3 Controlling PON Traffic Flows |
|
|
561 | (2) |
|
13.8.4 Protection Switching for PON Configurations |
|
|
563 | (1) |
|
13.8.5 WDM PON Architectures |
|
|
564 | (2) |
|
|
566 | (6) |
|
|
572 | (5) |
|
14 Basic Measurement and Monitoring Techniques |
|
|
577 | (2) |
|
14.1 Overview of Measurement Standards |
|
|
579 | (1) |
|
14.2 Survey of Test Equipment |
|
|
580 | (2) |
|
14.2.1 Lasers Used for Test Support |
|
|
582 | (1) |
|
14.2.2 Optical Spectrum Analyzer |
|
|
582 | (1) |
|
14.2.3 Multipurpose Test Equipment |
|
|
583 | (1) |
|
14.2.4 Optical Attenuators |
|
|
584 | (1) |
|
14.2.5 OTN Tester for Performance Verification |
|
|
584 | (1) |
|
14.2.6 Visual Fault Indicator |
|
|
585 | (1) |
|
14.3 Optical Power Measurement Methods |
|
|
585 | (2) |
|
14.3.1 Physical Basis of Optical Power |
|
|
585 | (2) |
|
14.3.2 Optical Power Meters |
|
|
587 | (1) |
|
14.4 Characterization of Optical Fibers |
|
|
587 | (5) |
|
14.4.1 Refracted Near-Field Method |
|
|
587 | (1) |
|
14.4.2 Transmitted Near-Field Technique |
|
|
588 | (1) |
|
14.4.3 Optical Fiber Attenuation Measurements |
|
|
588 | (4) |
|
14.5 Concept of Eye Diagram Tests |
|
|
592 | (4) |
|
14.5.1 Standard Mask Testing |
|
|
594 | (1) |
|
14.5.2 Stressed Eye Opening |
|
|
595 | (1) |
|
|
596 | (1) |
|
14.6 Optical Time-Domain Reflectometer |
|
|
596 | (7) |
|
14.6.1 OTDR Trace Characterization |
|
|
597 | (2) |
|
14.6.2 Attenuation Measurements with an OTDR |
|
|
599 | (1) |
|
|
600 | (1) |
|
14.6.4 Locating Fiber Faults |
|
|
601 | (1) |
|
14.6.5 Measuring Optical Return Loss |
|
|
602 | (1) |
|
14.7 Optical Performance Monitoring |
|
|
603 | (8) |
|
14.7.1 Network Management Systems and Functions |
|
|
604 | (2) |
|
14.7.2 Optical Layer Management |
|
|
606 | (2) |
|
14.7.3 Fundamental OPM Function |
|
|
608 | (1) |
|
14.7.4 OPM Architecture for Network Maintenance |
|
|
609 | (1) |
|
14.7.5 Detecting Network Faults |
|
|
610 | (1) |
|
14.8 Optical Fiber Network Performance Testing |
|
|
611 | (8) |
|
|
612 | (1) |
|
|
613 | (2) |
|
14.8.3 Q Factor Estimation |
|
|
615 | (1) |
|
14.8.4 OMA Measurement Method |
|
|
616 | (2) |
|
14.8.5 Measurement of Timing Jitter |
|
|
618 | (1) |
|
|
619 | (3) |
|
|
622 | (1) |
Correction to: Fiber Optic Communications 1 |
|
622 | (1) |
Appendix A International Units and Physical Constants |
|
623 | (2) |
Appendix B Decibels |
|
625 | (2) |
Appendix C Acronyms |
|
627 | (8) |
Appendix D List of Important Roman Symbols |
|
635 | (4) |
Appendix E List of Important Greek Symbols |
|
639 | |