Improvement of temperature stability of E-field sensor with LiNbO<sub>3 </sub>crystal

Yang Yan; Xie Shuguo; Tian Yumo; Wang Tiening; Yang Meiling

doi:10.11884/HPLPB202133.210384

Volume 33 Issue 12

Dec. 2021

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Yang Yan, Xie Shuguo, Tian Yumo, et al. Improvement of temperature stability of E-field sensor with LiNbO3 crystal[J]. High Power Laser and Particle Beams, 2021, 33: 123024. doi: 10.11884/HPLPB202133.210384

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Yang Yan, Xie Shuguo, Tian Yumo, et al. Improvement of temperature stability of E-field sensor with LiNbO₃crystal[J]. High Power Laser and Particle Beams, 2021, 33: 123024. doi: 10.11884/HPLPB202133.210384

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Improvement of temperature stability of E-field sensor with LiNbO₃crystal

doi: 10.11884/HPLPB202133.210384

School of Electronic and Information Engineering, Beihang University, Beijing 100083, China

Received Date: 2021-08-30
Rev Recd Date: 2021-12-02

Available Online: 2021-12-07

Publish Date: 2021-12-15

Abstract

Abstract

LiNbO₃ crystal has been widely used in various electric field sensors due to its high electro-optic coefficient and stable physical and chemical properties. However, the refractive index of LiNbO₃ crystal is sensitive to temperature. When using the direction of maximum electro-optic effect, the natural birefringence causes the crystal working point to drift with temperature. On the one hand, this makes the sensor work unstably, on the other hand, it also affects the sensitivity and dynamic range of the sensor. To eliminate this effect, two LiNbO₃ crystals with equal optical path and orthogonal principal axes will be used in the probe. One is sensing crystal and the other is compensation crystal. Due to the compensation crystal, the natural birefringence of the sensor is greatly suppressed, and the temperature stability is also improved. The experimental results show that the working state stability of the compensated sensor is much better than that of the uncompensated sensor.
- optic E-field sensor,
- electro-optical effect,
- LiNbO₃,
- dual crystal,
- temperature stability

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References

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