The Theory and Experiment of Parametric Amplification of Three-wave Nonlinear Interaction in Water  

作　　者：LAN Chaofeng YANG Desen LU Di GUO Xiaoxia ZHOU Zhonghai 

机构地区：[1]School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150001, China [2]Science and Technology on Underwater Acoustic Laboratory, Harbin Engineering University, Harbin 150001, China [3]Institute of oceangraphic Instrumention. Shandong Academy of Science, Qingdao 266001, China)

出　　处：《Chinese Journal of Electronics》2013年第2期308-312,共5页电子学报（英文版）

基　　金：This work is supported by the National Basic Research Program of China （973 Program） （No.7131107）, Project of National Defense （No.B0820060400, No.51310080202）, and Project supported by the National Natural Science Foundation of China （No.51206101, No.10532010）.

摘　　要：The theoretical and experimental research on energy changes due to nonlinear wave interactions is presented. The physical principle of wave parametric am- plification underwater was analyzed from the view of ex- ternal force acting. The acoustic amplitude solutions to nonlinear wave interactions were given according to Burg- ers equation by imitating a three-wave interaction model. The process of the sound energy transfer was simulated and the results demonstrated that sound energy presented a tendency of pulsation variation, either to increase or to decrease. The experimental results of wave energy ampli- fication were given under the condition of wave optimum coupling. Results of the theoretical and experimental re- search provide a technical guidance for analysis of sound energy changes during nonlinear wave interactions under- water, which shows the feasibility of detecting underwater weak signals through three-wave coupling.

关 键 词：Nonlinear wave interactions Energy transfer  Parametric amplification  Wave optimum cou- pling. 

分 类 号：O413[理学—理论物理] O431[理学—物理]