Optical current sensing element with single medium layers for high voltage applications

Theoretical analysis of the temperature characteristics of an optical current sensing element

“…With the transformer model established in reference [11], the variation of the Verdet constant with temperature fluctuation upon the output scale factor is shown in Fig. 3.…”

Influences of extinction ratio and bias-angle error of polarizers on the performance of an optical current sensor

“…The schematic diagram of the optical current sensor is shown in figure 1 [1]. The optical process inside the sensor can be written, using a Jones' Matrix [2], as: Fig.…”

A novel design of the sensor head for avoiding the influence of the reflection phase shift in optical current transducer

“…Such a reflection phase shift may change the linear polarized light into an elliptical polarized light [6] and degrade the measurement sensitivity and accuracy of the BGOCT. To solve this problem three approaches have been brought forwards, such as dual-quadrature reflection, critical angle, and polarization preserving total reflection (PPTR) methods [7,8]. The principle of the dual-quadrature reflection method is replacing single reflection by double reflections at the incident point, and the reflection phase shift caused by the double reflections can be counteracted.…”