Title :
Fiber sensor for simultaneous measurement of voltage and temperature
Author :
Filippov, Valery N. ; Starodumov, Andrey N. ; Minkovich, Vladimir P. ; Lecona, Francisco G Pena
Author_Institution :
Centro de Investigaciones Opticas, Leon, Mexico
Abstract :
We report a new configuration of the fiber-optic voltage sensor based on the Bi/sub 12/TiO/sub 20/ crystal, which allows simultaneous measurements of both voltage and temperature. In our scheme, a quarter-ware plate, being an inherent element of voltage sensor, serves simultaneously as a phase-shifting element and as a temperature sensitive element. The sensor operates at two wavelengths (633 and 976 nm). The sensor has a linear temperature characteristic within the range of 10/spl deg/C-70/spl deg/C, providing the accuracy of temperature measurements of 0.3/spl deg/C. As a voltage sensor, this device has a linear amplitude characteristic up to 1000 V/sub rms/ and the excellent temperature stability of 0.1% within the temperature range of 10/spl deg/C.-70/spl deg/C.
Keywords :
bismuth compounds; fibre optic sensors; measurement errors; optical materials; optical phase shifters; temperature measurement; temperature sensors; voltage measurement; 10 to 70 C; 633 nm; 976 nm; Bi/sub 12/TiO/sub 20/; Bi/sub 12/TiO/sub 20/ crystal; fiber sensor; fiber-optic voltage sensor; linear temperature characteristic; measurement accuracy; phase-shifting element; quarter-ware plate; simultaneous measurement; temperature measurement; temperature sensitive element; temperature stability; voltage measurement; voltage sensor; Bismuth; Optical fiber sensors; Optical refraction; Optical sensors; Optical variables control; Sensor phenomena and characterization; Temperature distribution; Temperature measurement; Temperature sensors; Voltage measurement;
Journal_Title :
Photonics Technology Letters, IEEE
