On the basis of the fact, the detailed discussion is given on the way and significance of simplifying the measuring work in the fiber optic cable link engineering, and some notable problems of bending loss.
This paper introduces the field application of FMS-1 fixed optical fiber connectors to tour single mode optical cable lines 154 have been used, the average connecting loss is 0.125dB and the average joint loss for each optical fiber line is 0.15dB. The longest connected line is 33km.
The article discusses some mutual protection ways of fiber cable links by physical two tours. One of them is an assume that mutual protection transmission system makes up of 1/2 branching devices, 1/2 optical switches and WDM based on the feature of metro area fiber cable links. It is desired that moving and maintenance branches and firms concerned make more studies, discussions and experiments.