OPTISCHE NEBENSCHLUSSVORRICHTUNG

摘要

An optical shunt device in which a pair of connecting ends (22, 23) for being connected to optical communication fiber sections (11) are divided into three systems. The first of the three systems is a passing-through light conduction path (19) through which light signals in two opposite directions are allowed to pass through between the connecting ends. The second of the three systems is a receiving light conduction path (20) having a first light-receiving end (20a) and a second light-receiving end (20b) each receiving a light signal from the connecting ends (22, 23). The third light path (21) has a first light-transmitting end (21a) and a second light-transmitting end (21b) each transmitting a light signal to the connecting ends. The optical shunt device also comprises a photo-electric conversion unit (B) including a light-receiving element (13) disposed at the first and second light-receiving ends (20a, 20b) for receiving a light signal from the fist light-receiving end (20a) and the second light-receiving end (20b) of the second light path (20) and converting it into an electric signal, an amplifier circuit (14) for amplifying the electric signal from the light-receiving element (13), and a light-emitting element (17) disposed at the first and second light-transmitting ends (21a, 21b) for converting the electric signal into an optical signal to supply the optical signal to the first and second light-transmitting ends.