2-Color Combiners (Two Wavelength Combiners): 2-Color Fiber Combiners, also known as wavelength division multiplexers (WDMs), combine only two wavelengths (typically red and green or green and blue), allowing for the production of a limited color spectrum. This technique enables bidirectional communications over a. Wavelength Division Multiplexing (WDM) is a technique in fiber-optic communication systems that enables multiple optical signals with different wavelengths to be combined, transmitted, and separated over a single optical fiber. This makes it possible to scale capacity cost-effectively by using existing infrastructure more efficiently. WDM allows communication in both the directions in the fiber cable. This chapter addresses the operating principles of WDM. ptical multiplexing techniques, wavelength division multiplexing (WDM).
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