Measurement of the Quadratic Electro-Optic Coefficient of KTN Crystal with an Electro-Optic Modulation System in the Presence of Polar Nano-Regions

An electro-optic modulation system was adopted for measuring the quadratic electro-optic coefficient of KTN crystal. Theoretical analysis and experimental results verified the feasibility of this method. The quadratic electro-optic coefficient of a KTN crystal chip, which has a Curie temperature of...

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Bibliographic Details
Published in:Crystals (Basel) 2021-10, Vol.11 (10), p.1234
Main Authors: Yang, Lie-Kun, Liu, Bing, Qiao, Pan-Yu, Yu, Hua-Jian, Wang, Xu-Ping, Li, Jing, Yang, Yu-Guo, Zhang, Yuan-Yuan, Qiu, Cheng-Cheng, Zhang, Hua-Di
Format: Article
Language:English
Subjects:
Coefficients
Crystals
Curie temperature
Electric fields
KTN single crystal
Lasers
Light
Modulation
Phase transitions
polar nano-regions
quadratic electro-optic coefficient
Single crystals
Temperature
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Summary:An electro-optic modulation system was adopted for measuring the quadratic electro-optic coefficient of KTN crystal. Theoretical analysis and experimental results verified the feasibility of this method. The quadratic electro-optic coefficient of a KTN crystal chip, which has a Curie temperature of 0 °C, was measured using this system in the temperature range of 2 °C to 18 °C (Tc = 0 °C). The influences of temperature, AC voltage and frequency on the quadratic electro-optic coefficient were discussed. It was found that the relaxation effect of PNRs (polar nano-regions) played an important role in the determination of the quadratic electro-optic coefficient of KTN crystal.
ISSN:2073-4352
2073-4352
DOI:10.3390/cryst11101234