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|1. (WO2018202132) LASER-BASED WIRELESS FREQUENCY TRANSMISSION SYSTEM AND TRANSMISSION DEVICE THEREOF AND TRANSMISSION METHOD THEREFOR|
|Title:||LASER-BASED WIRELESS FREQUENCY TRANSMISSION SYSTEM AND TRANSMISSION DEVICE THEREOF AND TRANSMISSION METHOD THEREFOR|
Disclosed by the present invention are a laser-based wireless frequency transmission system and a transmission device thereof and a transmission method therefor. The system comprises a transmitting end (10) and at least one receiving end (20). The receiving end (20) comprises a beam returning unit (203) used for reflecting a portion of a received laser signal back to the transmitting end (10). The transmitting end (10) comprises at least one pair of third beam expanders (104) and a phase compensation unit (105). The third beam expander (104) is used for coupling the laser signal reflected back by the receiving end to the phase compensation unit (105). The phase compensation unit (105) is used for comparing in real time the phases of a reference frequency signal and a microwave signal which is modulated in the laser signal reflected back by the receiving end, and adjusting the phase of the laser signal modulated with the reference frequency signal according to a phase error.