Fig. 4 A section of the confusion matrix for the KNN algorithm used in the decoder.
Conclusions : It is demonstrated that it is possible to code 32 polarizations states over a non-polarization maintaining single-mode fibre at 633 nm by using an artificial intelligence K-nearest neighbor algorithm with 4 features and 13 neighbours with an average assertiveness index of 99.02%. This is a good estimate for applications in which the angular position of a device needs to be determined and the information sent through a standard non polarizing fibre.
Acknowledgments: The authors wish to express their gratitude to Instituto Politécnico Nacional for the support to conduct this study and Consejo Nacional de Ciencia y Tecnología for the provision of schollarships.
 2021 The Authors. Electronics Letters published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology
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Received: xx Accepted: xx
doi: 10.1049/ell2.10001