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

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 870
Author(s):  
Cheng-Kai Yang ◽  
Xu-Ping Wang ◽  
Fei Zhang ◽  
Hua-Di Zhang ◽  
Bing Liu ◽  
...  

KTa0.65Nb0.35O3 and Fe-doped KTa0.65Nb0.35O3 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.

2020 ◽  
Vol 1002 ◽  
pp. 132-139
Author(s):  
Sabah Al-Ithawi ◽  
Wasan A. Hekmat ◽  
Kadhim A. Hubeatir ◽  
Shams B. Ali ◽  
Suad M. Kadhim ◽  
...  

In this work, different sizes of BaTiO3 (BTO) were characterized. The effective parameters were studied to reach optimum performance in order to realize an optical modulator. The parameters such as spectroscopy, electro-optic coefficient, crystalline structure, and birefringence indicated that BaTiO3 has an excellent behavior to manipulate the light by Pockels modulator, spatially in the field of telecom. The sample size (10×3 mm) was shown a good performance compare with other samples, for example, the BTO has low absorption, high variation of output as a function of voltage applied and good efficiency that showed by figure of merit. In addition, a low half-wave voltage (Vπ) was observed.


2010 ◽  
Author(s):  
Hind Mahé ◽  
Dominique Bosc ◽  
Nicolas Gayet ◽  
Fabrice Odobel ◽  
Pierre-Antoinne Bonnardel ◽  
...  

2014 ◽  
Author(s):  
Y. Enami ◽  
Y. Jouane ◽  
D. Zhang ◽  
Y.C. Chang ◽  
J. Luo ◽  
...  

2007 ◽  
Vol 91 (1) ◽  
pp. 019901 ◽  
Author(s):  
Y. Enami ◽  
C. T. DeRose ◽  
C. Loychik ◽  
D. Mathine ◽  
R. A. Norwood ◽  
...  

2014 ◽  
Vol 43 (2) ◽  
pp. 154-158 ◽  
Author(s):  
Somnath Sen ◽  
Shyamal Kumar Pal ◽  
Sourangshu Mukhopadhyay

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 5350-5352 ◽  
Author(s):  
Guofang Fan ◽  
Yuan Li ◽  
Chunguang Hu ◽  
Lihua Lei ◽  
Hongyu Li ◽  
...  

2018 ◽  
Vol 913 ◽  
pp. 459-465 ◽  
Author(s):  
Xia Zeng ◽  
Wen Xiu Cheng ◽  
Ping Sun Qiu ◽  
Xi Yun He

Highly transparent lead lanthanum zirconate titanate (Pb1−xLax)(Zr0.65Ti0.35)1-x/4O3(x=0.096-0.1) electro-optic ceramics were prepared by the hot pressing method. The ceramics exhibited transparency as high as 67% at 632.8nm (close to the theoretical value). The effects of lanthanum substitution on the phase structure, microstructure, dielectric, ferroelectric, optical and electro-optic properties of PLZT were examined systematically. The XRD results indicated that all the compositions were single perovskite phases, and La substitution decreased the lattice constant and unit-cell volume. The dielectric results showed that the Tmaxand εmaxdecreased with La content increasing. The hysteresis loops showed that the La content reduced saturate polarization (Ps), remnant polarization (Pr) and coercive field (Ec). Moreover, the half-wave voltage and EO coefficient R was enhanced and reduced respectively with increasing La.


2001 ◽  
Vol 78 (20) ◽  
pp. 3136-3138 ◽  
Author(s):  
Hua Zhang ◽  
Min-Cheol Oh ◽  
Attila Szep ◽  
William H. Steier ◽  
Cheng Zhang ◽  
...  

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