Aerial and underwater laser-induced acoustic communication device for improving photoacoustic conversion efficiency and application thereof

Abstract

The invention relates to the technical field of acousto-optic communication, in particular to an aerial and underwater laser-induced acoustic communication device capable of improving the photoacoustic conversion efficiency and application thereof. A DHPIM double-head pulse interval modulation module, a laser excitation and scanning control module and a pulse CO2 laser which are connected in sequence are arranged in atransmitting mechanism, wherein optical signals output by the pulse CO2 laser are processed by a light beam shaping mechanism and then are transmitted through air, so that the laser signals interact with a water medium in an optical breakdown mode after reaching the water surface, and the laser pulse is converted into a sound wave signal to be propagated in all directions underwater; an underwater optical fiber hydrophone is arranged in a receiving mechanism, and the optical fiber hydrophone is used for receiving sound wave signals. Compared with the prior art, the probability of data loss or decoding can be effectively reduced; the transmission capacity and the bandwidth efficiency are improved, and the implementation complexity of the system is simplified.

Description

Technical field: [0001] The present invention relates to the technical field of acousto-optic communication, in particular to an aerial and underwater laser-induced acoustic communication that can greatly reduce system energy consumption, increase communication distance, ensure communication information security and confidentiality, and improve photoacoustic conversion efficiency devices and their applications. Background technique: [0002] With the ever-changing resources and environment, the ocean has gradually become the focus of national strategic development. Marine underwater target detection will play an increasingly prominent role in future wars and national economic production, such as real-time information exchange, communication, command and control in naval warfare, so detection in the marine environment is very important. Photoacoustic detection technology combines the advantages of laser and sound waves, and focuses laser light in seawater to excite sound wav...

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Problems solved by technology

[0003] Aiming at the problems of traditional air and ocean communication, such as large signal loss, poor security, short communication distance, and great diff...

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