Optical communication system, master station device, slave station device, and optical communication method

An optical communication system is provided with a master station device and a slave station device, the master station device generating a first digital signal including control information, and transmitting a downlink optical signal including the generated first digital signal and an analog master signal to the slave station device. The slave station device acquires the first digital signal included in the downlink optical signal received from the master station device, and transmits an uplink optical signal including the acquired first digital signal to the master station device. The master station device acquires the control information from the first digital signal included in the uplink optical signal received from the slave station device. 一种光通信系统，其具有主站装置和从站装置，上述主站装置生成包含控制信息的第一数字信号，向上述从站装置发送包含所生成的上述第一数字信号和模拟的主信号的下行光信号，上述从站装置进行如下的返回处理：获取从上述主站装置接收的上述下行光信号所包含的上述第一数字信号，向上述主站装置发送包含所获取的上述第一数字信号的上行光信号，上述主站装置从自上述从站装置接收的上述上行光信号所包含的上述第一数字信号获取上述控制信息。