The Types and Applications of Fiber Optic Circulators
In wireless access network, circulator is mainly used to isolate the output signal from the input signal of the base station antenna. Circulators and isolators are core components in 5G base stations. With the large increase of 5G Massive MIMO, the demand for fiber optic circulators will also increase significantly.
Characteristics of Fiber Optic Circulators
The main feature of fiber optic circulator is that it enables bidirectional optical signal transmission on a single fiber. The direction of signal transmission of the circulator is irreversible, and the optical signal can only be directed from one port to another in one direction at a time. Although the optical signal can be redirected, it must pass sequentially through ports in one direction. For example, in a 3-port circulator, optical signal must pass from port to port 2, before transmitting to port 3.
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