SIGNAL DETECTION IN OPTICAL FIBRE

摘要

In a self-contained device, a section (25) of an optical fibre (2), to be connected in an optical line conveying an optical signal to be detected, is curved. A photovoltaic detector (4) receives a light energy extracted from the curved section and provides electric energy. A switch (81) is in a first state (T) and a switch (82) is closed for supplying a current detector (6) and a display (7) by a micro-accumulator. The switch is at a second state (R) for charging the micro-accumulator (5) in particular when the photovoltaic detector detects the light energy extracted from the curved section. The switching from one state to the other is easily made using a push button. The display indicates a signal propagation defect in the line if the current is lower than a threshold.