Fiber-optic voltage sensor based on a Bi12TiO20 crystal.
A fiber-optic voltage sensor based on the longitudinal Pockels effect in a Bi(12)TiO(20) crystal is described. The use of a special backreflecting prism as a phase-retarding element is shown to improve the sensitivity and temperature stability of the sensor. A comparison between the temperature properties of the glass backreflecting prism and that of a quarter-wave plate is derived. The sensor demonstrates temperature stability of +/-1.5% from -20 degrees C to 60 degrees C and sensitivity of 0.145% per 1 V(rms) at 850 nm without the use of an additional temperature control channel.
Filippov
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Centro de Investigaciones en Optica, AC, Loma del Bosque No 115, Col Lomas del Campestre, Apartado Postal 1-948, 37150 Leon, GTO, Mexico. valera@foton.cio.mx
Starodumov
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AN
Barmenkov
Y O
YO
Makarov
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VV