Patent ID: 8195047
Filing Date: 2012-06-05
Classification: H04N

Abstract:
1. A cable television optical fiber communication system, comprising: a provider end having an information source supplying equipment; plural user ends, each of the user ends having at least one set-top box served to emit an analog return signal to the information source supplying equipment; and plural optical signal transmission devices, each of the optical signal transmission devices respectively connected to the information source supplying equipment and one of the set-top boxes at the user ends, the optical signal transmission device comprising: wherein when the detection unit detects that one of the user end starts to transfer an analog return signal to the RF return module, the laser on/off circuit drives the laser control circuit to enable the BOSA, when the detection unit detects that the user end stops transferring the analog return signal, the laser on/ff circuit drives the laser control circuit to disable the BOSA.