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WDM
WDM is the short form of Wavelength Division Multiplexing, in our products range there are WDM products in the fiber optic coupler series and the WDM fiber optic media converters, and here we explain what the WDM is.

In the early times, fiber optic signal transmission is one wavelength in one fiber glass, because fiber optic cables are with very big bandwidth, people finally found a way, that is the WDM technology, to enable various kinds of fiber optic light to transmit in a single fiber glass in different wavelength, with WDM we can save the cost - instead of using many fiber optic cables, now one cable can function well.

Earlier WDM technology only transmit 1310nm and 1550nm wavelength fiber optic light, below is a picture for illustration as how it works:
wdm

The WDM structure looks similar like a common fiber optic coupler, but they are different because fiber optic couplers divide the same wavelength fiber optic signals by different ratios such as 1:99, while WDM divide the two different wavelength fiber optic light as shown on the above picture.

We provide the WDM fiber optic media converters, this type is also called a single fiber bi-direction fiber optic media converters, this unit also adopt the WDM technology, they are used in pairs, generally, it is one converter with 1310nm transmitter and 1550nm receiver, used with another piece with 1550nm transmitter and 1310nm receiver, so that they form a pair to work. WDM fiber optic media converters must be used by pairs.
 

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Fiber Optic Applications

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