Advanced Photonics Nexus, Volume. 3, Issue 4, 046010(2024)

Multimode fiber speckle Stokes polarimeter

Yuxuan Xiong1...2, Ting Jiang1,2, Hao Wu1,2,*, Zheng Gao1,2, Shaojun Zhou3, Zhao Ge1,2, Siqi Yan1,2, and Ming Tang12,* |Show fewer author(s)
Author Affiliations
  • 1Huazhong University of Science and Technology, School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Wuhan, China
  • 2Huazhong University of Science and Technology, School of Optical and Electronic Information, Next Generation Internet Access National Engineering Laboratory, Wuhan, China
  • 3Huazhong University of Science and Technology University, School of Mechanical Science and Engineering, Wuhan, China
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    Figures & Tables(12)
    (a) SOP with known Stokes parameters can be equated to a point on a sphere of radius S0 with coordinates (S1, S2, and S3), or a vector pointing to the point (S1, S2, and S3) from the origin. (b) Length of vector difference between actual and predicted SOP vectors is utilized to describe the error of the system.
    Scheme of the experimental setup for SOP adjustment and speckle collection.
    (a) MPC contains two individually rotatable quarter-wave plates. (b) The speckle patterns with different SOPs are captured by CCD, and the corresponding Stokes parameters are shown under the speckles.
    Structure of CNN mapping SOP to speckle.
    Data set of SOPs with a rotation step size of 20 and covering the entire Poincaré sphere. (a) Distribution of SOPs on the Poincaré sphere. (b) Distribution of RMSEs related to SOPs. (c) The RMSEs corresponding to points in the test set. (d) Comparison of actual and predicted Stokes parameters.
    Data set of SOPs with a rotation step size of 20 covering part of the Poincaré sphere. (a) Distribution of SOPs on the Poincaré sphere. (b) Distribution of RMSEs related to SOPs. (c) The RMSEs corresponding to points in the test set. (d) Comparison of actual and predicted Stokes parameters.
    Distribution of SOP data sets on the Poincaré sphere corresponding to different MPC rotation steps: (a) 1 step, (b) 5 steps, (c) 10 steps, and (d) 20 steps.
    RMSE distribution of SOPs in test sets with different MPC rotation steps: (a) 1 step, (b) 5 steps, (c) 10 steps, and (d) 20 steps.
    Loss of SOPs in test sets on the Poincaré sphere corresponding to different MPC rotation steps. SOPs are randomly selected and do not overlap with the training or validation sets. (a) 1 step, (b) 5 steps, (c) 10 steps, and (d) 20 steps.
    Comparison of actual and predicted Stokes parameters in test data sets with different MPC rotation steps. (a) 1 step, (b) 5 steps, (c) 10 steps, and (d) 20 steps.
    Test data sets include SOPs with a rotation step size of 80, covering the entire Poincaré sphere. The wavelength interval is 0.5 nm with a bandwidth of 10 nm. (a) The speckles with the same SOP of [1.022465, −0.6899, −0.2947, and 0.6608] at different wavelengths. (b) The distribution of SOPs with different wavelengths. (c) RMSEs of SOPs in the test data sets corresponding to different wavelengths.
    • Table 1. RMSEs of test data sets with different MPC rotational steps.

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      Table 1. RMSEs of test data sets with different MPC rotational steps.

      MPC Rotational Steps151020
      MPC rotation angle interval (deg)0.2251.1252.2504.500
      Vector difference0.01150.05730.10910.2015
      RMSE0.00420.00820.01330.0658
      Precision of S00.00210.00320.00910.0189
      Precision of S10.00430.00910.01440.0783
      Precision of S20.00500.00860.01420.1076
      Precision of S30.00280.00630.00680.0694
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    Yuxuan Xiong, Ting Jiang, Hao Wu, Zheng Gao, Shaojun Zhou, Zhao Ge, Siqi Yan, Ming Tang, "Multimode fiber speckle Stokes polarimeter," Adv. Photon. Nexus 3, 046010 (2024)

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    Paper Information

    Category: Research Articles

    Received: Feb. 29, 2024

    Accepted: Jun. 12, 2024

    Published Online: Jul. 10, 2024

    The Author Email: Wu Hao (wuhaoboom@hust.edu.cn), Tang Ming (tangming@mail.hust.edu.cn)

    DOI:10.1117/1.APN.3.4.046010

    CSTR:32397.14.1.APN.3.4.046010

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