关键词: 激光技术, 相干合成, 模式选择, 自成像共焦腔, 空间滤波器

Abstract:

The coherent combination of one-dimensional fiber laser array is studied experimentally by self-imaging confocal resonator. The phase locking output of Yb3+ doped double-cladding fiber laser array has been obtained, and the intensity distribution of the far field pattern based on one-dimensional fiber laser array by self-imaging confocal resonator has also been realized. Based on the theoretical calculations of the self-imaging confocal resonator, a proper width metal wire is chosen as the spatial filter and steady interference fringes are experimentally obtained when the filter is placed at the plane of the output mirror. The experiment results verify the loss functions of the spatial filter for different mode pattern with different filter place and confirm the spatial filter’s mechanism of mode selection.

Key words: laser techniques, coherent combination, mode selection, self-imaging confocal resonator, spatial filter