For example, the optical module has a receiving end (Rx) and a transmitting end (Tx). When in use, it is necessary to ensure that the receiving end and the transmitting end are in an interconnected state, and such matching between the transmitting end and the receiving end at both ends. Polarity in fiber optic networks refers to the alignment of transmit (Tx) and receive (Rx) signals between interconnected devices. In fiber optics, data travels from the Tx port of one device to the Rx port of another, forming a two-way communication path. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside. Expert in access network, PON, GPON, etc. The transmitter converts the electrical signal into an optical signal, which is transmitted through optical fiber, and then the receiver converts the optical. After transmission through the optical fiber, the receiving interface converts the optical signals into electrical signals using a photodetector diode and outputs electrical signals of the corresponding bit rate after pre-amplification.
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