Liu Shixin, Liu Hang, Qi Xuepeng, Peng Wanjing, Feng Yujun, Chen Li, Li Zhendong, Sun Yinhong, Ma Yi, Zhao Zhigang, Gao Qingsong, Liu Zhaojun, Tang Chun
Opt Lett. 2023 Oct 1;48(19):5121-5124. doi: 10.1364/OL.497511.
Coherent beam combining (CBC) of cylindrical vector beams (CVBs) based on an active phase controller is proposed and demonstrated. Experimentally, two pieces of spatially variant wave plates (S-wave plate) were employed as vector mode convertors for two individual 1064-nm fiber amplifier channels. When the system was in a closed loop, a combined output power of 10 W and a CBC efficiency of higher than 94% were achieved, for both TM (radially polarized) mode and TE (azimuthally polarized) mode cases. Moreover, the laser system showed a high vector mode purity, which was measured to be ∼97.4% (TM) and ∼97.3% (TE). To the best of knowledge, this could possibly be the first demonstration of CBC of CVBs, which paves the way for power scaling of CVBs.
提出并演示了基于有源相位控制器的圆柱矢量光束（CVB）的相干光束合成（CBC）。在实验中，使用两片空间可变波片（S波片）作为两个独立的1064nm光纤放大器通道的矢量模式转换器。当系统处于闭环状态时，对于TM（径向偏振）模式和TE（角向偏振）模式情况，均实现了10W的组合输出功率和高于94%的CBC效率。此外，该激光系统显示出高矢量模式纯度，经测量，TM模式约为97.4%，TE模式约为97.3%。据所知，这可能是CVB的CBC的首次演示，为CVB的功率扩展铺平了道路。
