Laser acoustic underwater communication system adaptive to wave height

Abstract

The invention discloses a laser acoustic underwater communication system adaptive to wave height, and relates to the field of laser acoustic underwater communication, for solving the problem that in the prior art, the wave height cannot be adaptively adjusted, and the photoacoustic conversion efficiency is low and the underwater communication quality is poor under the condition that the weather isbad and the carrying platform is large in disturbance. The system comprises a laser, a beam expander lens set, an optical focusing system, a laser ranging system, a controller and a motor; light beams emitted by the laser is subjected to beam expanding of the beam expander lens set, then enters the optical focusing system, and is focused underwater after passing through the optical focusing system, so as to motivate to generate sound waves for communication, and to motivate the laser ranging system to measure the wave height in real time, sea level altitude data measured in real time is transmitted to the an overall control system, after data processing, an electrical signal is transmitted to the motor, and the motor controls the optical focusing system to adjust correspondingly to compensate the sea level altitude change caused by waves, so that the best underwater laser focusing position is kept, and the breakdown position of the underwater communication system is adjusted in real time.

Description

technical field [0001] The invention belongs to the field of laser-induced acoustic underwater communication, in particular to a laser-induced acoustic underwater communication system with self-adaptive sea wave height. Background technique [0002] Submarines are an important part of modern military forces. Concealment and reliability are the main goals of submarine-to-shore communications. Laser-acoustic underwater communication technology combines the advantages of small transmission loss of infrared lasers in the atmosphere and small attenuation of sound waves in seawater. , has broad application prospects in the field of underwater communication. Laser-induced acoustic underwater communication technology utilizes aerospace platforms to carry lasers. The modulated laser signals emitted by the aerial platforms are focused on the seawater surface and the position close to the underwater surface. The acoustic signal is excited by the optical breakdown effect, and the underw...

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Problems solved by technology

[0004] In order to solve the problems in the prior art that the sea wave height cannot be adaptively adjusted, the weather is bad, and the carrying platform has a large disturbance, the photoacoustic conversion efficiency is low, and the underwater communication quality is poor, and an adaptive sea wave height is proposed. Laser Acoustic Underwater Communication Optical System

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