Ya Wen, Xing Zhao, Zhixiang Jiang, Da Li, "High-performance multimode fiber specklegram sensing with a multi-layer convolutional neural network based on digital aperture filtering," Chin. Opt. Lett. 23, 051201 (2025)
- Chinese Optics Letters
- Vol. 23, Issue 5, 051201 (2025)
Fig. 1. (a) Schematic diagram of a light field direction sensing system; (b) speckle patterns of different fibers under specific light field directions; (c) the variation of speckle correlation coefficients of different fibers with the light field direction.
Fig. 2. The angular PSF curves corresponding to the speckles emitted from (a) MMF 1 and (b) MMF 2; the variation of the speckle correlation coefficient with the light field direction and the decorrelation angle for (c) MMF 1 and (d) MMF 2. ‘a’ represents the radius of the fiber.
Fig. 3. The structural diagram of the proposed MLCNN.
Fig. 4. The MAE and S.D. of light field direction sensing results for MMF 1 and FMF 1. (a) Test set I; (b) Test set II.
Fig. 5. The MAE and S.D. of light field direction sensing results for MMF 2 and FMF 1. (a) Test set I; (b) Test set II.
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Table 1. Comparison of Light Field Direction Sensing Results Using Various Fibers With Different Methods
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