| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical network including a remote antenna unit capable of suppressing occurrence of a power loss to an uplink. <P>SOLUTION: The present invention relates to an optical network for bi-directional communication including: a base station for generating downlink optical signals and detecting uplink optical signals; and a remote antenna unit for transmitting the downlink optical signals and generating the uplink optical signals to the base station, wherein the remote antenna includes: an optical detector for converting the downlink optical signals into downlink radio signals; an antenna for transmitting the downlink radio signals to outside thereof, and receiving the uplink radio signals in wireless communication; a semiconductor optical amplifier for converting the uplink radio signals into the uplink optical signals to output the uplink optical signals to the base station; and a circulating device having a plurality of ports, each of which is connected to the antenna, the optical detector, and the semiconductor optical amplifier, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
