Answer: The main component of the optical receiver is the photodetector, that is, the high-sensitivity photodiode (PIN). The photodiode uses the photoelectric effect of the semiconductor to complete the detection of the optical signal, so that the optical signal is restored to the RF TV signal, and then the The RF signal is amplified and processed by AGC level control to output qualified RF signal for network distribution.

The main technologies of optical receivers are C/N, C/CTB, and C/CSO. These three technical indicators are all determined by the performance of the photoelectric conversion module. In the case of the same optical power input, the RF level of the conversion output is divided into large and small. When the conversion efficiency of the photoelectric module is high, its output power If the level is high, the C/N value index will be good. On the contrary, the C/N value index will be worse. The two technical indicators of C/CSO and C/CTB are determined by the linearity of the optoelectronic module. High-quality optoelectronic modules allow a wider range of received power under the same C/CSO and C/CTB indicators.