Page 7 - Introduction to Information Optics

vi Contents

Chapter 2. Signal Processing with Optics 67
2.1. Coherence Theory of Light 67
2.2. Processing under Coherent and Incoherent Illumination 7 2
2.3. Fresnel-Kirchhoff and Fourier Transformation 76
2.3.1. Free Space Impulse Response 76
2.3.2. Fourier Transformation by Lenses 77
2.4. Fourier Transform Processing 79
2.4.1. Fourier Domain Filter 79
2.4.2. Spatial Domain Filter 82
2.4.3. Processing with Fourier Domain Filters 83
2.4.4. Processing with Joint Transformation 85
2.4.5. Hybrid Optical Processing 88
2.5. image Processing with Optics 89
2.5.1. Correlation Detection 89
2.5.2. Image Restoration 93
2.5.3. Image Subtraction 98
2.5.4. Broadband Signal Processing 98
2.6. Algorithms for Processing 103
2.6.1. Mellin-Transform Processing 104
2.6.2. Circular Harmonic Processing 105
2.6.3. Homomorphic Processing 107
2.6.4. Synthetic Discriminant Algorithm 108
2.6.5. Simulated Annealing Algorithm 112
2.7. Processing with Photorefractive Optics i 15
2.7.1. Photorefractive Eifect and Materials 115
2.7.2. Wave Mixing and Multiplexing 118
2.7.3. Bragg Diffraction Limitation 121
2.7.4. Angular and Wavelength Selectivities 122
2.7.5. Shift-Invariant Limited Correlators 125
2.8. Processing with Incoherent Light 131
2.8.1. Exploitation of Coherence 131
2.8.2. Signal Processing with White Light 135
2.8.3. Color Image Preservation and Pseudocoloring 138
2.9. Processing with Neural Networks 141
2.9.1. Optical Neural Networks 142
2.9.2. Holpfield Model 143
2.9.3. Inpattern Association Model 144
References 147
Exercises 148

Chapter 3, Communication with Optics 163
3.1. Motivation of Fiber-Optic Communication 163
3.2. Light Propagation in Optical Fibers 164
3.2.1. Geometric Optics Approach 164
3.2.2. Wave-Optics Approach 164
3.2.3. Other Issues Related to Light Propagating in Optical Fiber 168
3.3. Critical Components 184
3.3.1. Optical Transmitters for Fiber-Optic Communications —
Semiconductor Lasers 184