Current Optics and Photonics

Optical Society of Korea (한국광학회)
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An Optical Intense 2D Electric Field Sensor Using a Single LiNO3 Crystal

  • Zhang, Yuanying (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Zhang, Jiahong (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Li, Yingna (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Lei, Hongyi (Faculty of Information Engineering and Automation, Kunming University of Science and Technology)
  • Received : 2021.09.16
  • Accepted : 2022.02.28
  • Published : 2022.04.25
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Abstract

Based on the linear electro-optic (EO) effect of lithium niobite (LiNbO3, LN) crystal, an intense two-dimensional (2D) electric field sensor was analyzed, fabricated and experimentally demonstrated. The linear polarized light beam transmits along the optical axis (z-axis) of the LN crystal, and the polarization direction of the polarized light is 45° to the y-axis. The sensor can detect the intensity of a 2D electric field that is perpendicular to the z-axis. Experimental results demonstrated that the minimum detectable electric field of the sensor is 10.5 kV/m. The maximum detected electric field of the sensor is larger than 178.9 kV/m. The sensitivity of the sensor is 0.444 mV/(kV·m-1). The variation of the sensitivity is within ±0.16 dB when the sensor is rotated around a z-axis from 0° to 360°. The variation of the sensor output optical power is within ±1.4 dB during temperature change from 19 ℃ to 26 ℃ in a day (from 7:00 AM to 23:00 PM) and temperature change from 0 ℃ to 40 ℃ in a controllable temperature chamber. All theoretical and experimental results revealed that the fabricated sensor provides technology for the direct detection of intense 2D electric fields.

Keywords

Acknowledgement

The authors thank National Natural Science Foundation of China for help identifying collaborators for this work.

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