| LiNbO3 섬유 단결정의 분극에 관한 연구 |
| 강봉훈, 장재혁1, 최덕균1, 신태희2, 주기태2 |
극동대학교 안경광학과
1한양대학교 신소재공학부
2한국과학기술연구원 재료기술연구본부 |
| Study on Poling of LiNbO3 Fiber Single Crystals |
| Bong-Hoon Kang, Jae-Hyuk Jang1, Duck-Kyun Choi1, Tae-Hee Shin2, Gi-Tae Joo2 |
Department of Visual Optics, Far East University
1Division of Materials Science & Engineering, Hanyang University
2Materials Science & Technology Research Division, Korea Institute of Science and Technology |
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| ABSTRACT |
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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 $LiNbO_3$. |
| Key words:
Lithium niobate ($LiNbO_3$), $\mu$-PD method, Fiber single crystals, Ridge, Poling |
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