BRANCHING METHOD FOR TRUNK LINE OPTICAL SIGNAL AT CATV SYSTEM AND TRUNK LINE BRANCHING AMPLIFIER USED FOR THE SAME

摘要

PURPOSE: To enable high-definition long-distance transmission with an optical cable even in the present state of not spreading optical communication due to the optical cable to general home. ;CONSTITUTION: A trunk line optical signal to be transmitted by an optical cable 1 is converted to an electric signal by a trunk line branching amplifier 2, this electric signal is amplified, this electric signal is converted to an optical signal and transmitted to the optical cable 1, and the amplified electric signal is outputted as a branch signal. The trunk line branching amplifier 2 to be used for this processing is provided with an O/E converter 3 for converting the trunk line optical signal inputted by the optical cable 1 to the electric signal, RF amplifier 4 for amplifying this electric signal, E/O converter 5 for converting the amplified electric signal to an optical signal and outputting it to the optical cable 1, and brancher 6 for branching and outputting one part of the RF signal amplified by the RF amplifier 4.;COPYRIGHT: (C)1995,JPO