Renqi Liu, Chun Peng, Xiaoyan Liang, Ruxin Li, "Coherent beam combination far-field measuring method based on amplitude modulation and deep learning," Chin. Opt. Lett. 18, 041402 (2020)
- Chinese Optics Letters
- Vol. 18, Issue 4, 041402 (2020)
Fig. 1. (a) A simple schematic diagram of a two-beam tiled-aperture CBC system and (b) the training procedure of DCNN.
![Far-field distribution under different beam-pointing and phase differences: (a) [0,0,0,0,0], (b) [20 μrad,20 μrad,−20 μrad,−20 μrad,0], and (c) [0,0,0,0,π].](/richHtml/col/2020/18/4/041402/img_002.jpg)
Fig. 2. Far-field distribution under different beam-pointing and phase differences: (a)
![Far-field distribution under different amplitude modulation ratios: (a) A2=A1, [20 μrad,20 μrad,0,0,0], (b) A2=A1, [0,0,20 μrad,20 μrad,0], (c) A2=2A1, [20 μrad,20 μrad,0,0,0], and (d) A2=2A1, [0,0,20 μrad,20 μrad,0].](/Images/icon/loading.gif){kind=icon}
Fig. 3. Far-field distribution under different amplitude modulation ratios: (a)
Fig. 4. (a) Training and validation errors across training epochs. (b) The testing set error of 500 samples; the red circle represents the beam-pointing error, and the blue sign represents the phase difference error.
Fig. 5. Testing set error distribution, in the cases of
Fig. 6. Testing set error distribution, in the cases of
Fig. 7. Testing set error distribution, in the cases of
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Table 1. Measurement Errors Under Different Wavefront Aberrations
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