Patent ID: 11965801
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 7:
8. A measurement system that inspects an optical transmission line including a plurality of optical fiber lines, the system comprising:
a measurement device including a light source configured to output testing light, and a first power meter and a second power meter each configured to measure intensity of light,
wherein a pair of optical fiber lines among the plurality of optical fiber lines is optically connected to each other via a coupler at one end,
a first optical fiber line of the pair of optical fiber lines includes a first end and a second end opposite to the first end, the second end corresponding to the one end at which the coupler is provided,
a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end opposite to the third end, the third end corresponding to the one end at which the coupler is provided,
the light source causes the testing light to be incident on the first end,
the first power meter measures first intensity which is intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines,
the second power meter measures second intensity which is intensity of second output light output from the first end, and
the second output light is obtained by demultiplexing the testing light that has propagated through the first optical fiber line from the first end, by the coupler.