Optical Communication Line Tester by measuring return loss and Testing method of the same

摘要

It is inserted into an optical line between an optical communication operator and an optical communication subscriber, and includes its own light source that outputs light of a predetermined wavelength, and the optical power of the first optical signal output by the optical communication operator, and the first optical signal is the optical communication subscriber side Measuring the optical power of the first reflected light reflected back from, the optical power of the second optical signal generated by the self-light source, and the second reflected light returned by the second optical signal reflected from the optical communication subscriber side Compare the first loss, which is the difference between the optical power of the first optical signal and the optical power of the first reflected light, and the second loss, which is the difference between the optical power of the second optical signal and the optical power of the second reflected light. It provides an optical communication line checker including a determining unit for determining whether the line is in use.