采用自行设计的基于大规模可编程门阵列(FPGA)结构的控制电路,实现了4路光纤激光的多抖动法相干合成。对大气湍流和机械振动引起的相位噪声进行了有效补偿,使远场光斑条纹对比度由开环时的0.21提高到了闭环时的0.93,闭环时远场特定孔径内的能量较开环时提高了3.3倍。该方法还对人为抖动光纤引起的较高频率噪声具有很好的抑制作用,系统闭环后,远场光斑条纹对比度可达到0.72。 A self-designed control circuit based on a large-scale programmable gate array (FPGA) structure is adopted to realize the multi-jitter coherent synthesis of a 4-way fiber laser. The phase noise caused by atmospheric turbulence and mechanical vibration is effectively compensated so that the contrast of the far-field spot fringes increases from 0.21 in the open loop to 0.93 in the closed loop, and the energy in the specific aperture in the far field during the closed loop is increased by 3.3 Times The method also has a good inhibition effect on the higher frequency noise caused by artificial dithering optical fiber. After the system is closed-loop, the contrast of far-field spot stripes can reach 0.72.