System and method for dual-channel optical phase modulation mm wave generation and remote vibration provision in mm wave optical transmission system
An optical fiber transmission and phase modulation technology, applied in electromagnetic wave transmission system, transmission system, free space transmission and other directions, can solve the problems of complex millimeter wave generation technology system, high cost and difficult maintenance.
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[0049] A preferred implementation example of the present invention is a downlink transmission system and method applied to a 38GHz RoF system: see figure 1 , the system for generating the two-way optical phase modulation millimeter wave and providing the remote local oscillator in the millimeter wave optical fiber transmission system includes a central station 1, a base station 2 and an optical fiber 3 connecting them. The structure of the central station 1 is as follows: a laser 1-1 is connected with a polarization controller 1-2 through a pigtail, and the polarization controller 1-2 is connected with a two-electrode Mach-Zehnder modulator 1-3 through a pigtail The optical input terminal is connected; a cosine microwave signal source 1-11 is connected to the input terminal of a microwave differential power amplifier 1-12, and the two output terminals of the microwave differential power amplifier 1-12 are respectively connected to the two-electrode Mach -The two RF input termi...
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