Fiber-optic voltage sensor based on a Bi_12TiO_20 crystal

Abstract

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.

Structural compression and vibrational properties of Bi12SiO20sillenite from experiment and theory

“…In particular, the photorefractive effect is used in many technical applications of sillenites (Baade et al 2001, Buse 1997, Georges et al 2001, and single crystals of sillenite also serve as optical sensors for electric current and voltage (van den Tempel 1993, Kaneko et al 1999, Filippov et al 2000 or as surface acoustic wave guides (Lu et al 2000).…”

“…The choice of the particular octants depended on the orientation of the crystal within the DAC. Integrated intensity data were obtained using the beamline-adopted software REDUCE (Eichhorn 1987) and AVSORT (Eichhorn 1978). The absorption of the x-ray beam by the diamond anvils and by the crystal was corrected with the program ABSORB, version 6.1 (Angel 2004).…”

Polymeric Integrated-Optic Bias Chip for Optical Voltage Transducers

“…Though a QWP is a simple way to adjust the bias point, it has temperature dependent birefringence. The temperature dependence was reduced by incorporating a PBS with low temperature dependence [10]. Optical waveguide technology was also employed to produce the OVTs in a LiTaO 3 substrate using proton exchange or Ti-indiffusion for waveguide fabrication, and this as the advantage of mass producible optical sensors [11], [12].…”

Electric field and temperature measurement using ultra wide bandwidth pigtailed electro-optic probes

“…Different solutions have been proposed to solve this problem like using a specific orientation of the EO crystal that minimizes thermal effects [3]. None of these solutions are completely satisfactory as they require electrical bias [4], laser wavelength control [5], complex designs or with low tolerances [6] … to get rid of the temperature dependent sensor response. R.…”