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Fig. 4-1: Pure-crystal energy-band diagram
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Fig. 4-2: n-type material 2
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Fig. 4-3: p-type material 3
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Fig. 4-4: Electron diffusion across a pn junction
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Fig. 4-5: Reverse bias condition
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Fig. 4-6: Forward bias condition
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Fig. 4-8: Double-heterostructure configuration
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Fig. 4-9: Surface-emitting LED
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Fig. 4-10: Edge-emitting LED
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Fig. 4-14: LED spectral patterns
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Fig. 4-15: Light-emission cone
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Fig. 4-16: 3-dB bandwidth points
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Fig. 4-17: Laser transition processes
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Fig. 4-18: Fabry-Perot resonator cavity
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Fig. 4-19: DFB laser
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Fig. 4-20: Optical output vs. drive current
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Fig. 4-21: Fabry-Perot laser spectrum
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Fig. 4-30: Relaxation oscillation peak
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Fig. 4-31: Temperature dependence
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Fig. 4-35: Modulation methods
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Fig. 4-38: Speckle patterns
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Fig. 4-39: Time-resolved laser spectra
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