摘要：【中文】本发明属于水下无线通信技术领域，公开了一种基于非线性晶体的大功率水下无线激光通信系统及方法，基于非线性晶体的大功率水下无线激光通信系统包括光源模块、信号调制模块、射频驱动模块、光放大模块、波长变换模块和光纤准直模块。本发明使用1064nm红外光外调制技术加光放大技术与非线性晶体的倍频特性相结合，通过光纤准直系统实现了速率大于100Mbps、输出波长532nm、发散角小于2mrad，光功率大于1W的大功率无线激光转光纤输出，准直后无线输出的水下激光通信系统；本发明水中封装简单，输出光斑可调，而且可提升传输距离，从而扩大水下高速无线通信的覆盖区域，使水下无线光通信更加实用化。 【EN】The invention belongs to the technical field of underwater wireless communication, and discloses a high-power underwater wireless laser communication system and method based on a nonlinear crystal. The invention uses 1064nm infrared light external modulation technology and light amplification technology to combine with the frequency doubling property of nonlinear crystal, and realizes an underwater laser communication system which converts high-power wireless laser with the speed of more than 100Mbps, the output wavelength of 532nm, the divergence angle of less than 2mrad and the optical power of more than 1W into optical fiber output and wirelessly outputs after collimation by using an optical fiber collimation system; the underwater high-speed wireless communication system is simple in underwater packaging, adjustable in output light spot and capable of increasing the transmission distance, so that the coverage area of underwater high-speed wireless communication is enlarged, and the underwater wireless optical communication is more practical.