| Title |
Low Frequency Electric Field Sensor using a Reflective Interference Type of Optical Modulator |
| Authors |
최영규(Choi, Young-Kyu) ; 김기래(Kim, Girae) |
| Keywords |
optical modulator ; electric field sensor ; dielectric waveguide |
| 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. |