多单元光纤激光阵列的倾斜控制实验研究

Experimental research of tip/tilt control of a multi-channel fiber-laser array

本文结合光纤激光阵列技术的发展趋势,介绍一种基于大模场面积光纤的自适应光纤光源准直器的研制进展,搭建七单元光纤激光阵列,进行平行发射体系下阵列间的倾斜控制实验,并初步探索了基于目标在回路的共形发射体系下阵列间的倾斜控制.最后,在三级全光纤放大链路的主振荡-功率放大系统中,完成了两路10W量级光纤激光阵列的倾斜控制及锁相.为在实际大气环境下应用光纤激光阵列技术提供了参考.

The fiber-laser array technique has an extensive prospect of applications in the areas of coherent beam combination, free-space laser communications and so on. In this paper, considering the development trend of the fiber-laser array technique, the research progress of an adaptive fiber-optic collimator based on large-mode-area fiber is introduced, a 7-channel fiber-laser array is established, the tip/tilt control experiment of laser array under parallel-transmission configuration is conducted, and the tip/tilt control of laser array under conformal-transmission configuration using target-in-the-loop is explored. Finally, the tip/tilt control and phase locking of two 10-W level fiber lasers are achieved in the master-oscillator-power-amplifier （MOPA） system with three-stage all-fiber amplifiers. This paper presents a reference for using the fiber-laser array technique in real atmospheric environment.