MEASUREMENT OF THE FLOAT-ZONE INTERFACE SHAPE FOR LITHIUM-NIOBATE

NCU Institutional Repository > 工學院 > 機械工程研究所 > 期刊論文 > Item 987654321/27071

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/27071

题名:	MEASUREMENT OF THE FLOAT-ZONE INTERFACE SHAPE FOR LITHIUM-NIOBATE
作者:	CHEN,JC;HU,C
贡献者:	機械工程學系
关键词:	CRYSTAL-MELT INTERFACE;SINGLE-CRYSTAL;OPTICAL FIBERS;GROWTH;RESOLUTION
日期:	1995
上传时间:	2010-06-29 18:06:59 (UTC+8)
出版者:	中央大學
摘要:	A new technique has been developed to locate the interface shape in the floating zone of lithium niobate materials. The floating zone is formed and uniformly heated by a CO2 laser with an axisymmetric ring-shaped beam generated by an axicon optical system. The emitted thermal radiation from the hot object has been measured by an imaging radiometer. The interference of the CO2 laser with the measurement of the radiometer is avoided by setting the spectral bandpass of radiation to 3-5 mu m. The location of the gas-solid or gas-melt interface is determined through the significant difference of the emitted radiation between the solid or melt and the background. Since the lithium niobate is viewed as a semitransparent material and the emittances of the solid and melt are significantly different, the locations of the melt-solid and gas-melt-solid interfaces are determined according to the change of the emitted radiation intensity. The floating zone is resolidified, and the interior of the resultant solid is observed by SEM (scanning electron microscopy) to identify the location and shape of the melt-solid interface. The results predicted by the variation of radiation intensity are consistent with those observed from the SEM.
關聯:	JOURNAL OF CRYSTAL GROWTH
显示于类别:	[機械工程研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	448	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....