Amplifier for optical fibre and amplification method

摘要

An optical signal (6a) is amplified and passes through an optical fibre doped with rare earths (1). Excitation light is synthesized in an optical coupler (4) and sent to the optical fibre (1) via an optical coupler (5). Part of the light is diverted from the optical coupler (5) to an optical detector (receiver) (14), passing through a passband optical filter (13). The optical detector (14) converts the optical signal received into an electric signal and sends it to an error signal emission circuit (114). The current received is diverted to excitation light source control circuits (9 and 10) which produce control by feedback (146 and 147). … …