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Wavelength division multiplexer

Wavelength division multiplexing (WDM) is a rapidly emerging technology that enables a very significant increase in the aggregate volume of data that can be transmitted over optical fibers. A wavelength division multiplexer (WDM) may be used to combine or separate optical signals having different wavelengths. For example, a two channel WDM can be used to combine two optical signals or to separate an incoming signal into two components that have two different wavelengths. Fiber optic networks are becoming increasingly popular for data transmission due to their high speed, high capacity capabilities. Multiple wavelengths may be transmitted along the same optic fiber. These wavelengths are combined to provide a single transmitted signal. Wavelength divisions multiplexers are used in optical communication networks to combine various optical signals (channels) carried by two or more optical wavelengths into a single, common carrier. The use of wavelength division multiplexers (WDMs) provides a simple and economical way to increase the transmission capacity of fiber optic communication systems by allowing multiple wavelengths to be transmitted and received over a single optical fiber through signal wavelength multiplexing and demultiplexing. In a WDM optical transmission, a wavelength division multiplexer combines optical signals of various wavelengths, the signal consisting of the various wavelengths is transmitted to a transmission path, and a wavelength division demultiplexer separates the optical signal received from the transmission path into respective wavelengths.

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