BIREFRINGENT SPUN-FIBER FOR DETERMINING THE CURRENT WITH OWN INSENSITIVITY TO TEMPERATURE Russian patent published in 2018 - IPC G01R15/24 

FIELD: physics.

SUBSTANCE: group of inventions refers to the area for measuring current or magnetic field. Current sensor comprises a birefringent fiber having a local linear birefringence B ≠ 0, in which the relative temperature dependence (1 / B)^.dB / dT of said birefringence is greater than zero for at least one wavelength λ and for at least one temperature T between -60 °C and 120 °C. In this case, this positive relative temperature dependence leads to at least partial compensation of the temperature dependence of the Verde constant of the fiber material. In addition, the current sensor comprises a light source generating light of at least one wavelength λ and a measuring unit measuring the phase shift between the two polarization modes transmitted through said fiber.

EFFECT: decrease in the temperature dependence of the fiber and the current sensor.

17 cl, 4 dwg