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利用自成像共焦腔,开展了一维光纤激光阵列相干合成的实验研究,实现了掺Yb~(3+)双包层光纤激光阵列的相位锁定,得到了基于一维光纤激光阵列自成像共焦腔的远场强度分布图样。根据其数学模型及理论计算,合理选择了空间滤波器宽度,验证了空间滤波器在合成激光不同位置对不同相干成分模式所引入的损耗抑制作用,从实验上证实了空间滤波器在相干合成中实现模式选择的机理。
The experiment of coherent synthesis of one-dimensional fiber laser arrays was carried out by self-imaging of the confocal cavity. Phase locking of the Yb 3+ -doped double-clad fiber laser arrays was achieved, and the self-imaging based on one-dimensional fiber laser arrays The far-field intensity distribution pattern of the focal cavity. According to its mathematical model and theoretical calculation, the width of the spatial filter is reasonably selected, and the effect of the spatial filter on the loss suppression introduced by different coherent component modes at different positions of the synthetic laser is verified. It is empirically verified that the spatial filter is coherently synthesized Mechanism to achieve mode selection.