Time-division multiplexing electric-branching radio-frequency optical transmission module

Abstract

The invention relates to a time-division multiplexing radio-frequency optical transmission module which comprises a module control unit, an FSK (frequency shift keying) communication unit, an input end unit and an output end unit. The input end unit comprises an input end radio-frequency signal processing unit, a signal branching unit, an adjustable attenuator and a radio-frequency / optical signal conversion unit; the output end unit comprises an output end radio-frequency signal processing unit, a signal combining unit, an adjustable attenuator and an optical / radio-frequency signal conversion unit; the optical / radio-frequency signal conversion unit is internally provided with a detector; the number of lasers in the radio-frequency / optical signal conversion unit is the same as the number of detectors in the optical / radio-frequency signal conversion unit; the FSK communication unit comprises an FSK modulator and an FSK demodulator; the module control unit are respectively connected with the radio-frequency / optical signal conversion unit, the optical / radio-frequency signal conversion unit, the FSK modulator and the FSK demodulator; the FSK modulator is connected with the input end of the signal branching unit; and the FSK demodulator is connected with the output end of the signal combining unit.

Description

technical field [0001] The invention belongs to the field of radio frequency communication equipment, and in particular relates to a one-to-multiple-channel electrical-division radio-frequency optical transmission module. Background technique [0002] In the existing optical fiber repeater system, a far-end needs a near-end optical transmission module, and the cost of the corresponding mode is very high. Although the cost of using the optical splitting method is very low, due to the large insertion loss of the optocoupler, it is difficult to design the radio frequency circuit, and it is difficult to make an excellent radio frequency index. In addition, the wavelengths of different remote lasers are the same, and interference will occur when they work at the same time, which will affect the normal operation of the entire system. At the same time, because all the remote ends share a near-end sending and receiving part, it is difficult to adjust the link gain, which makes the ...

AI Technical Summary

Problems solved by technology

Although the cost of using the optical splitting method is very low, due to the excessive insertion loss of the optocoupler, it is difficult to design the radio frequency circuit, and it is difficult to make an excellent radio frequency index

In addition, the wavelengths of different remote lasers are the same, and interference will occur when they work at the same time, which will affect the normal operation of the entire system

At the same time, since all the remote ends share a near-end sending and receiving part, it is difficult to adjust the link gain, resulting in extremely inconvenient engineering use

Images