Growth of Ferroelectric Single Crystal Fibers by the infrared light assisted LHPG method

红外光辅助 LHPG 法生长铁电单晶纤维

• 批准号: 07455011
• 负责人: ADACHI Masatoshi
• 金额: $ 4.86万
• 依托单位: Toyama Prefectural University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455011/
• 关键词: fiber; LHPG; ferroelectrics; K_3Li_2Nb_5O_<15>; SHG device; fiber-optics; K_3Li_2Nb_5O_<15>; 炭酸ガスレーザ加熱帯域融解法

A potassium lithium niobate (KLN) crystal is well-known as a useful material for electrooptic and nonlinear-optic (blew light generation) applications. The growth of this KLN crystal in decent sizes and quality is very difficult by the Czochralski method, because of its complex compounds, no possession of the congruently melting composition and thermal equilibrium growth. On the other hand, the laser heated pedestral growth (LHPG) method has many advantages such as freedom from contamination problems from crucibles, high growth rate, precise controllability of fiber diameter and possibility of fiber growth from either congruent or incongruent melt composition materials.In this study, K_3Li_<2-x>Nb_<5+x>O_<15+2x> fibers with compositions of x=0,0.15 and 0.3 were grown by the halogen lamp assisted LHPG method. The growth conditions were a growth rate of 11mm/h, a laser power of 3.40W and a halogen lamp power of 500W.The fibers obtained were transparent, and approximately 0.72mm in diameter and 15mm in length. It was confirmed by the Laue X-ray photography that the growth axis corresponded th the c axis and grown fibers were of single crystals. The Curie temperature of the fiber was 420ﾟC,which corresponded to that of a feed rod.It is concluded that the halogen lamp assisted LHPG method is suitable for KLN single crystal fiber growth with a stoichiometric composition

氯钾（KLN）晶体是众所周知的，是用于电型和非线性光（BLEW光生成）应用的有用材料。 Czochralski方法的这种KLN晶体的生长非常困难，由于其复杂的化合物，没有一致的融化成分和热等效生长的潜力。另一方面，激光加热的前座生长（LHPG）方法具有许多优势，例如免受污染问题的自由，高生长速度，纤维直径的精确可控性以及纤维的精确可控性以及纤维的生长可能从一致或不一致的熔体组成材料中。 X = 0,0.15和0.3通过卤素灯辅助LHPG方法生长。生长条件的生长速率为11mm/h，激光功率为3.40W，卤素灯灯功率为500W。获得的纤维是透明的，直径约为0.72mm，长度约为15mm。 Laue X射线摄影证实了生长轴对应于C轴和生长纤维是单晶的。纤维的Curie温度为420℃，与进料杆相对应。

项目成果

Masatoshi Adachi: "Growth and Optical Properties of Potassium Lithium Niobate (KLN) Tungsten-Bronze Crystals, Films and Fibers." Proceedings of '97 International Symposium on Laser and Nonlinear Optical Materials. 196-202 (1997)

Masatoshi Adachi：“铌酸钾锂 (KLN) 钨青铜晶体、薄膜和纤维的生长和光学特性。”

Makoto Matsukura: "Growth of Potassium Lithium Niobate Single Crystal Fibers by the Laser-Heated Pedestal Growth Method." Jpn.J.Appl.Phys.Vol.36, No.9B. 5947-5949 (1997)

Makoto Matsukura：“通过激光加热基座生长方法生长铌酸钾锂单晶纤维。”

Zhiming Chen: "Growth and Properties of Tungsten-Bronze Ferroelectric Poatssium Lithium Niobate Single Crystals" Ferroelectrics. Vol.196, No.1-5. 265-268 (1997)

陈志明：“钨青铜铁电钾锂铌酸单晶的生长和性能”铁电体。

Zhiming Chen: "Growth and Properties of Tungsten-Bronze Ferroelectric Potassium Lithium Niobate Single Crystals" Ferroelectrics. 196 1-5. 265-268 (1997)

陈志明：“钨青铜铁电钾铌酸锂单晶的生长和性能”铁电体。

Makoto Matsukura: "Growth of Potassium Lithium Niobate Single Crystal Fibers by the Laser-Heated Pedestal Growth Method" Jpn.J.Appl.Phys.36 9B. 5947-5949 (1997)

Makoto Matsukura：“通过激光加热基座生长法生长铌酸钾锂单晶纤维”Jpn.J.Appl.Phys.36 9B。