Research on laser detection of underwater acoustic signals

Tian-song Li; Tian-hua Zhou; Ning He; De-kun Zhang; Yi-han Li

doi:10.1117/12.790794

22 February 2008 Research on laser detection of underwater acoustic signals

Tian-song Li, Tian-hua Zhou, Ning He, De-kun Zhang, Yi-han Li

Proceedings Volume 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology; 66220Q (2008) https://doi.org/10.1117/12.790794
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

A technique is developed to detect underwater acoustic signals by utilizing the resultant surface perturbations. It uses light wave in air and uses acoustic wave under water. Because two best channels are combined together, it is an ideal method for remotely detecting underwater acoustic signals. The underwater acoustic signal can cause the perturbations at water-air interface. These perturbations result in an amplitude modulation effect on a laser beam reflected by the water surface. The modulated underwater laser signal can be detected by using a direct light intensity detecting method. Based on the theory of modulation of the intensity of laser, a detection system was developed in the laboratory. By analyzing the massive experimental data, the technique of laser detection of underwater acoustic signals is validated.

Citation Download Citation

Tian-song Li, Tian-hua Zhou, Ning He, De-kun Zhang, and Yi-han Li "Research on laser detection of underwater acoustic signals", Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66220Q (22 February 2008); https://doi.org/10.1117/12.790794

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