Journal of Radio Electronics. eISSN 1684-1719. 2024. ¹10

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DOI: https://doi.org/10.30898/1684-1719.2024.10.11

 

 

MAGNETO-OPTICAL SENSITIVITY OF THE SPUN FIBER

IN THE PRESENCE OF AXIAL MECHANICAL TWISTING

 

S.K. Morshnev, N.I. Starostin, Y.V. Przhiyalkovskiy, A.I. Sazonov

 

Kotelnikov IRE RAS, Fryazino Branch

141190, Russia, Moscow region, Fryazino, sq. Vvedenskogo, 1

 

The paper was received July 3, 2024.

 

Abstract. The polarization state of light radiation in a spun fiber is one of the factors determining its magneto-optical sensitivity and application in current sensors. In the article, the effect of elastic twisting around the spun fiber axis on the evolution of radiation polarization and the sensitivity of the fiber is studied by modeling. It has been found that twisting effects or other effects that change the spiral pitch lead to degradation of the sensitivity of the spun fiber, and the amount of degradation is determined by the state of polarization at the input of the disturbed fiber section. It is shown that when returning to the non-stressed state with the initial parameters, the sensitivity of the fiber does not recover, but continues to decrease. The importance of minimizing twisted sections in the practical application of spun fiber in a current sensor is noted.

Key words: spun fiber, polarization state, magneto-optical sensitivity, Poincare sphere, spiral pitch.

Financing: The work was carried out within the framework of the state task of the Kotelnikov IRE RAS.

Corresponding author: Starostin Nikolay Ivanovich, nis229@ire216.msk.su

 

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For citation:

Morshnev S.K., Starostin N.I., Przhiyalkovskiy Y. V., Sazonov A.I. Magneto-optical sensitivity of the spun fiber in the presence of axial mechanical twisting // Journal of Radio Electronics. –2024. – ¹. 10. https://doi.org/10.30898/1684-1719.2024.10.11 (In Russian)