Measuring device and / or dynamic control of the power loss in an optical transmission line a supervisory channel and associates

摘要

An optical device is intended for the dynamic measurement of the power loss in an optical fiber (2) comprising an input (e) for receiving the optical signals and an outlet (s) in order to deliver the signals. This device comprises means for injection (4) arranged to inject the supervisory signals having an optical power chosen downstream of the input (e) of the fiber, and the detection means (5) arranged i) in order to extract the supervisory signals to the output (s) of the fiber (2) in order to determine their optical power and to deduce from this power and the optical power chosen from the primary information representative of the loss of optical power of the supervisory signals in the fiber, and ii) in order to compare said information units to a value representative of the power loss in the nominal optical fiber, so as to deliver the secondary information representative of a variation of the power loss in the optical fiber (2).