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Fig. 4-1: Pure-crystal energy-band diagram

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Presentation on theme: "Fig. 4-1: Pure-crystal energy-band diagram"— Presentation transcript:

1 Fig. 4-1: Pure-crystal energy-band diagram

2 Fig. 4-2: n-type material 2

3 Fig. 4-3: p-type material 3

4 Fig. 4-4: Electron diffusion across a pn junction

5 Fig. 4-5: Reverse bias condition

6 Fig. 4-6: Forward bias condition

7 Fig. 4-8: Double-heterostructure configuration

8 Fig. 4-9: Surface-emitting LED

9 Fig. 4-10: Edge-emitting LED

10 Fig. 4-14: LED spectral patterns

11 Fig. 4-15: Light-emission cone

12 Fig. 4-16: 3-dB bandwidth points

13 Fig. 4-17: Laser transition processes

14 Fig. 4-18: Fabry-Perot resonator cavity

15 Fig. 4-19: DFB laser

16 Fig. 4-20: Optical output vs. drive current

17 Fig. 4-21: Fabry-Perot laser spectrum

18 Fig. 4-30: Relaxation oscillation peak

19 Fig. 4-31: Temperature dependence

20 Fig. 4-35: Modulation methods

21 Fig. 4-38: Speckle patterns

22 Fig. 4-39: Time-resolved laser spectra


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