OPTICAL TRANSMISSION DEVICE FOR A HYBRID FIBRE-RADIO SYSTEM

摘要

The invention relates to an optical transmission device for a hybrid fibre-radio system in which optical signals are transmitted to transposers which generate therefrom radio signals in the GHz band. The optical transmission device has a first laser (1) which can emit light of a first optical frequency (n1), a second laser (2) which can emit light of a second optical frequency (n2), a coupler (6), to which the light emitted by the lasers (1, 2) can be supplied, and a photodetector (5), to which the light emerging at a connection (8) of the coupler (6) can be supplied. Between the photodetector (5) and the connection (8) of the coupler (6) there is provided an optical filter (4) having specified free spectral ranges. A control mechanism (3) controls the two lasers (1, 2) in dependence on a photocurrent generated by the photodetector (5).