Study on experimental method for underwater acoustic field detection from water surface using laser probe

摘要

The physical phenomenon of the perturbation on the water surface caused by underwater acoustic signals has been analyzed in this paper. A laser probe detection system in laboratory with a semiconductor laser (wavelength is 0.78μm, optical power is 5 mW) to measure signal underwater from the water surface was developed. Meanwhile, the synchronous measurement utilized a -200dB standard hydrophone was also done. The signal frequencies from 200Hz to 10KHz was measured and the results have been given. The experimental results show that the system is available.