| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical chaos synchronous communication system, etc., having high secrecy. SOLUTION: The master chaos laser 312 of a transmitter 311 generates an optical signal by chaos oscillation, an input receiving part 314 receives an input of a digital signal, a phase modulator 313 modulates the phase of the optical signal generated by the digital signal, a transmitting part 315 transmits the modulated optical signal. The receiving part 352 of a receiver 351 receives the transmitted optical signal, a light branching device 353 divides the received optical signal into 1st and 2nd optical signals, a slave chaos laser 355 receives the 1st optical signal as injected light and generates an optical signal by chaos oscillation so as to take chaos synchronization with it, a differential circuit 359 outputs a differential signal between the generated optical signal and the 2nd optical signal, and a lowpass filter 360 and a threshold filter 361 restore a digital signal from the differential signal and output the digital signal. |
