Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Characterization of the Stress-optic Properties of Ceramics by Terahertz Time-domain Spectroscopy

  • Zhi Qiang Wang (Department of Computer Science and Technology, School of Information Technology and Engineering, Tianjin University of Technology and Education) ;
  • Wen Jia Ren (Department of Computer Science and Technology, School of Information Technology and Engineering, Tianjin University of Technology and Education) ;
  • Gui Ying Zhang (Department of Microelectronics, School of Electronic Information Engineering, Tianjin University of Technology and Education) ;
  • Zhi Yong Wang (Department of Mechanics, School of Mechanical Engineering, Tianjin University)
  • Received : 2024.02.20
  • Accepted : 2024.04.05
  • Published : 2024.06.25
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Abstract

This paper introduces a rapid measurement technique for the stress-optic coefficient, using terahertz time-domain spectroscopy. First we propose a design combining a four-point bending device with a scanning stage to streamline the loading process. Then we detail the measurement principle and outline the signal-processing algorithm. The experiments are carried out on Al2O3, a representative ceramic material. The experimental data reveal that the refractive index of Al2O3 exhibits a linear decrease with increasing stress. This work supplies an efficient method for stress measurement rooted in the stress-optic effect.

Keywords

Acknowledgement

The Tianjin Education Commission Research Program Project of China [grant number 2022KJ118]; the Research Program Project of Tianjin University of Technology and Education [grant number KYQD1625 and KYQD14014].

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