Chapter 7 / 7.11 / 7.11.8

7.11.8 What Is Wavelength-Division Multiplexing (WDM)?

Explore how optical fibers can carry dozens or even hundreds of independent communication channels simultaneously using different wavelengths of light. Learn the difference between CWDM and DWDM and why WDM revolutionized fiber-optic communications.

1. What Is Wavelength-Division Multiplexing?
2. Why Is It Called Wavelength-Division Multiplexing?
3. Is WDM Really Just FDM for Light?
4. How Does WDM Work?
5. What Is an Optical Multiplexer?
6. What Is an Optical Demultiplexer?
7. Why Is WDM So Important?
8. What Is CWDM?
9. What Is DWDM?
10. How Many Wavelengths Can One Fiber Carry?
11. Which Wavelengths Are Normally Used?
12. What Is an Optical Amplifier?
13. Why Doesn't One Wavelength Interfere with Another?
14. Are There Any Practical Limitations?
15. Where Is WDM Used?
16. How Does WDM Work with Other Multiplexing Techniques?
17. Is WDM Still Evolving?
18. Why Is WDM Important?

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