OPTICAL TRANSCEIVER MODULE, OPTICAL COMMUNICATION SYSTEM AND OPTICAL SIGNAL TRANSMITTING-RECEIVING METHOD

摘要

An optical transceiver module, an optical communication system and an optical signal transmitting-receiving method. The optical transceiver module includes a first polarization gain device (1), a Faraday rotator (2), and a second polarization gain device (3). The first polarization gain device (1) is used for emitting the light signals; the Faraday rotator (2) is used for changing the polarization direction of the optical signals, enabling the optical signals not to be saturated when passing through the second polarization gain device (3); the second polarization gain device (3) is used for outputting the optical signals from the Faraday rotator (2), receiving the return optical signals reflected back by the Faraday rotating mirror (5), and outputting the return optical signals to the Faraday rotator (2) after the return optical signals reach saturation; and the Faraday rotator (2) is also used to change the polarization direction of the return optical signals, so that the return optical signals are amplified on the gain in the first polarization gain device (1). The optical transceiver module achieves smooth transmission of the optical signals and the information erasing and returning of the return optical signals with a simple structure and low cost.