METHOD FOR INSERTING OPTICAL PARTS INTO OPTICAL LINE AND METHOD FOR CONTRASTING OPTICAL FIBER OF OPTICAL LINE

摘要

PURPOSE:To reduce cost by connecting an optical connector connected to an optical part to an optical connector connected to an optical line to insert the optical part between the optical lines when the optical part is needed. CONSTITUTION:Optical fibers 7a and 7b are directly connected by the connectors 8a and 8b while there is no need for the optical part 9. The connectors are so switched that the connectors 8a and 8c are connected and 8b and 8d are connected to insert the optical part 9 into the optical path when the optical part 9 such as optical multiplexer and demultiplexer or optical coupler is needed in order to execute band measurement. Since the optical part 9 can be easily inserted into the optical lines 7a, 7b in such a manner when needed, the cost is reduced.