Electro-Optic Intensity Modulation in Fe-Doped KTa0.65Nb0.35O3 Crystals

Crystals

Lei Wei¹  Cheng-Kai Yang¹  Jing Li¹  Xian-Shun Lv¹  Yuan-Yuan Zhang¹  Xu-Ping Wang¹  Bing Liu¹  Hua-Di Zhang¹  Yu-Guo Yang¹  Fei Zhang¹ 

[1] Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China;

关键词: KTN crystals;    Fe doping;    electro-optic modulation;   

DOI  :  10.3390/cryst10100870

来源: DOAJ

【 摘 要 】

KTa_0.65Nb_0.35O₃ and Fe-doped KTa_0.65Nb_0.35O₃ crystals were grown by the top-seeded solution growth method (TSSG). Fe ion doping significantly improves the electro-optic properties of cubic KTN crystals. We describe their electro-optic modulation theory and experimental research. The electro-optic modulation waveform deduced by theoretical calculation is basically consistent with the waveform measured in the experiment. We observed the attenuation of light modulation under multiple voltage cycles. The modulation curve of the crystal is inconsistent when the crystal voltage is boosting and bucking. Under the same voltage condition, the higher the incident light power, the faster the modulation depth attenuation. In this experiment, the size of the KTN crystal chip is 6 mm × 5 mm × 2 mm. We obtain the effective electro-optic coefficient as s₁₁ − s₁₂ = 1.34 × 10⁻¹⁵ m²/V²; the half-wave voltage near the Curie temperature is 39 V.

【 授权许可】

Unknown