PWDM device is used in the encapsulation of optical modules, which can realize the multiplexing and demultiplexing of 1550nm, 1490nm/1310nm optical signals. It can double the transmission capacity of a single optical fiber, and also realize the two-way communication of single fiber. It is widely used in the upgrading of optical fiber network, expansion of capacity or introduction of integrated new services (radio and television, telecommunications, Internet network integration, PON + EOC), etc.
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