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Encrypted Audio Transmission Using Synchronized Nd: YAG Lasers

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Encoded information based on synchronization of coupled chaotic Nd:YAG lasers in master-slave configuration is numerically studied. Encoding, transmission, and decoding of information in optical chaotic communication with a single channel is presented. The authors analyze the robustness of the encrypted audio transmission in a channel noise. In order to illustrate this synchronization robustness, they present two cases of study: synchronization and transmission with a single channel without and with noise in the channel. Synchronization of chaotic systems has been greatly motivated by the possibility of encoding information by using a chaotic carrier.