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http://dx.doi.org/10.4191/KCERS.2009.46.4.419

Study on Poling of LiNbO3 Fiber Single Crystals  

Kang, Bong-Hoon (Department of Visual Optics, Far East University)
Jang, Jae-Hyuk (Division of Materials Science & Engineering, Hanyang University)
Choi, Duck-Kyun (Division of Materials Science & Engineering, Hanyang University)
Shin, Tae-Hee (Materials Science & Technology Research Division, Korea Institute of Science and Technology)
Joo, Gi-Tae (Materials Science & Technology Research Division, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.46, no.4, 2009 , pp. 419-424 More about this Journal
Abstract
Congruent or stoichiometric $LiNbO_3$ fiber single crystals were grown by the $\mu$-PD method, and the grown fiber crystals have the several (2 or 3) ridges with a diameter of $1.35{\sim}1.5\;mm$ and a length of $40{\sim}100\;mm$. In this $\mu$-PD process, different growth rates ($10{\sim}60\;mm/h$) were applied. Pt wire or $LiNbO_3$ crystal was used as a seed. The properties of grown $LiNbO_3$ fiber single crystals having a-axis or c-axis according to seeds were effected by the grown conditions(Pt tube diameter, pulling speed, after heater etc.). Disk-type $LiNbO_3$ samples were poled in condition of DC 5 V/cm at 1050, 1075 or $1100^{\circ}C$. XRD, SEM, conoscope image through the polarized microscope, $T_C$ measuring apparatus, optical transmittance measuring instrument are used to identify the properties of $LiNbO_3$.
Keywords
Lithium niobate ($LiNbO_3$); $\mu$-PD method; Fiber single crystals; Ridge; Poling;
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