Multi-channel optical frequency hopping system, signal encryption method and optical communication equipment

The invention provides a multi-channel optical frequency hopping system. The system comprises a transmitter which is used for generating at least two paths of different user signals and at least two paths of first pseudo-random code signals, generating at least two paths of optical carriers based on the at least two paths of first pseudo-random code signals, modulating the at least two paths of different user signals to the at least two paths of optical carriers, modulating one path of user signal on each path of optical carrier to obtain at least two paths of modulated optical carriers, and coupling the at least two paths of modulated optical carriers into one path of modulated optical carrier to complete encryption processing, and a receiver which is connected with the transmitter and is used for receiving the modulated optical carrier and decrypting the modulated optical carrier to obtain at least two paths of different user signals so as to complete decryption processing. According to the multi-channel op