2016
DOI: 10.3390/s16101627
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Compensation of Verdet Constant Temperature Dependence by Crystal Core Temperature Measurement

Abstract: Compensation of the temperature dependence of the Verdet constant in a polarimetric extrinsic Faraday sensor is of major importance for applying the magneto-optical effect to AC current measurements and magnetic field sensing. This paper presents a method for compensating the temperature effect on the Faraday rotation in a Bi12GeO20 crystal by sensing its optical activity effect on the polarization of a light beam. The method measures the temperature of the same volume of crystal that effects the beam polariza… Show more

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Cited by 9 publications
(5 citation statements)
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“…Many temperature compensation schemes have been proposed and can be found in the literature [27][28][29][30]. Despite this, the residual temperature needs to be quantified and have its influence on the uncertainty of the measurement evaluated.…”
Section: Temperaturementioning
confidence: 99%
“…Many temperature compensation schemes have been proposed and can be found in the literature [27][28][29][30]. Despite this, the residual temperature needs to be quantified and have its influence on the uncertainty of the measurement evaluated.…”
Section: Temperaturementioning
confidence: 99%
“…For FMs with a high Verdet constant, the temperature-induced relative change of FM length (item 2), , is two orders of magnitude lower than the temperature-induced relative change of the Verdet constant, , and can be neglected in Equation (24). For example, the Bi 12 GeO 20 crystal thermal expansion coefficient is [ 132 ] and the relative thermal change of the Verdet constant at 273 K is [ 133 ], making the insignificant.…”
Section: Temperature Compensationmentioning
confidence: 99%
“…Sci. 2019, 9 2 same volume of crystal that affects the beam polarization in a magnetic field or current sensing process [10]. A suitable initial phase delay angle can be selected to compensate changes in the Verdet constant caused by temperature when constructing a quarter-wave plate [11].…”
Section: Open Loop Mechanism Of Polarization-type Fiber Optic Currentmentioning
confidence: 99%
“…Some publications proposed measures for compensating temperature drift based on an analysis of the influence of temperature on fiber optic current sensor accuracy. Compensation of Verdet constant temperature dependence by crystal core temperature measures the temperature of the same volume of crystal that affects the beam polarization in a magnetic field or current sensing process [10]. A suitable initial phase delay angle can be selected to compensate changes in the Verdet constant caused by temperature when constructing a quarter-wave plate [11].…”
Section: Introductionmentioning
confidence: 99%