Fiber-optic current and voltage sensors using a Bi<sub>12</sub>GeO<sub>20</sub>single crystal

Kyuma, Kazuo; Tai, Shuichi; Nunoshita, Masahiro; Mikami, Naohiko; Ida, Yoshiaki

doi:10.1109/jlt.1983.1072069

Cited by 42 publications

(11 citation statements)

References 8 publications

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“…Using (8) to obtain the square magnitude F 2, the power is obtained by taking the time average of F 2 [21]. Dividing by the input power, which is proportional to F02/2, yields the optical transmission T given by = sin 2 F/2 = sin2[(TcV)/(2V_)], T (9) where V,_ = 2/(2n3r63)is called the half-wave voltage, i.e., V= V_ yields a retardation of rc which is one half of 2_r, or "one half wave".…”

Section: The Linear Electro-optic Effectmentioning

confidence: 99%

Electro-optic lightning detector

Koshak

Solakiewicz

1999

Appl. Opt.

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The design, alignment, calibration, and field deployment of a solid-state lightning detector is described. The primary sensing component of the detector is a potassium dihydrogen phosphate (KDP) electro-optic crystal that is attached in series to a fiat plate aluminum antenna; the antenna is exposed to the ambient thundercloud electric field. A semiconductor laser diode (2 = 685 nm), polarizing optics, and the crystal are arranged in a Pockels cell configuration.Lightning-caused electric field changes are related to small changes in the transmission of laser light through the optical cell. Several hundred lightning electric field change excursions were recorded during five thunderstorms that occurred in the summer of 1998 at the NASA Marshall Space Flight Center (MSFC) in northern Alabama.

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Section: The Linear Electro-optic Effectmentioning

confidence: 99%

Electro-optic lightning detector

Koshak

Solakiewicz

1999

Appl. Opt.

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“…Commonly, optical voltage sensors exploit the electro-optic effect in bulk crystalline materials like bismuth germanium oxide, bismuth silicon oxide, or lithium niobate [1][2][3][4][5][6]. If a light beam radiates through the crystalline materials, its state of polarization will change in a manner dependent on the voltage V applied on the crystalline materials, which is known as the Pockels effect (linear electro-optical effect).…”

Section: Introdutionmentioning

confidence: 99%

Design of a Novel Optical Voltage Sensor for Ultra-High Voltage Application

Xu¹,

Tang²,

et al. 2009

2009 Asia-Pacific Power and Energy Engineering Conference

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A novel optical voltage sensor for ultra-high voltage measurement is proposed in this paper. The sensor is based on the converse piezoelectric effect of quartz. The piezoelectric deformation of the quartz crystal induced by an applied alternating voltage is sensed by an electrophotonic detector. To measure the small piezoelectric deformation, an optical-beam-deflection method is presented and the corresponding optical path parameters are analyzed. Also, a multi-loop optical arm embedded in two parallel plates is presented. The optical path is dependent only on the height of the parallel plates and the laser incident angle and is independent of the width of the parallel plates, which facilitates the structural design of the sensor. Furthermore, a precision photoelectric conversion circuit is designed to convert the optical signal to electric voltage. According to the designed signal processing circuit, the ultra-high voltage sensor (500KV) is able to achieve an accuracy class of 0.1.

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“…Fiber-optic based electric field sensors have also been reported by different research groups. One approach is to apply fiberoptic based Pockels sensors [5,6], and another approach is based on the converse piezoelectric effect of fiber-optic material [7]. Recently, Pockels field sensor with ferroelectric liquid-crystal phase modulator for measuring the electric field close to an electric discharge has been reported [8].…”

Section: Introductionmentioning

confidence: 99%