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Low Frequency Electric Field Sensor using a Reflective Interference Type of Optical Modulator  

Choi, Young-Kyu (신라대 공대 전자공학과)
Kim, Girae (신라대 공대 전자공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.54, no.10, 2005 , pp. 471-476 More about this Journal
Abstract
We proposed an optical modulator of reflective type to compose the electric field sensor, and theoretically analyzed the performance and characteristics. For the high sensitivity of the sensor, a method to improve the modulation index of the modulator was presented. The electric field sensor using Ti:LiNbO$_{3}$ waveguide was fabricated and qualitatively investigated the characteristics by measuring the low frequency electric field. Even though the sensor showed relatively low modulation index, the electric filed strength of 10$^{-2}$V/m was measured. The experimental results revealed the utilities of this type electric field sensor.
Keywords
optical modulator; electric field sensor; dielectric waveguide;
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