摘要
在LiNbO3(LN)中掺进 0 .0 1%Fe2 O3(质量分数 )和 10 .9%K2 O(摩尔分数 )助熔剂 ,用顶部籽晶 (TSSG)法生长近化学计量比掺铁铌酸锂 (SLN∶Fe) ,以及采用Czochralski法生长同成分掺铁铌酸锂 (CLN∶Fe)。测试了晶体的晶格常数、吸收光谱和红外光谱。Li+取代反位铌(NbLi4 +)和占据锂空位 ,使SLN∶Fe晶体的晶格常数变小。SLN∶Fe晶体的吸收边相对于CLN∶Fe晶体发生了紫移。SLN∶Fe晶体的OH吸收峰移到 3 466cm- 1 。利用二波耦合光路测试了晶体的指数增益系数和响应时间 ,计算了有效载流子浓度。测试结果表明 :SLN∶Fe晶体的指数增益系数达到 2 8cm- 1 ,而CLN∶Fe晶体的指数增益系数为 18cm- 1 ;SLN∶Fe晶体的响应速度比CLN∶Fe晶体提高了 1个数量级。
Doping 0.01% Fe 2O 3 (in mass) and 10.9% K 2O (in mole) flux in raw materials of LiNbO 3 crystal, Fe doped near stoichiometric LiNbO 3 (SLN∶Fe) crystal were grown by top seeded solution growth (TSSG) method and Fe doped congruent LiNbO 3(CLN∶Fe) were grown by Czochralski method. The lattice constants, absorption spectra and infrared spectra were measured. Li + ions replace the anti site Nb and occupy the Li vacancy site, which results in the decrease of lattice constants of SLN∶Fe crystals compared with those of CLN∶Fe. The absorption edge of SLN∶Fe shifts to the shorter wavelength compared with that of CLN∶Fe, at 3 466 cm -1 . The exponential gain coefficient and the response time of SLN∶Fe crystal are measured by two wave coupling light. The result indicates that the exponential gain coefficient of SLN∶Fe crystals reaches to 28 cm -1 , while it is 18 cm -1 for CLN∶Fe; and the response time of SLN∶Fe crystal is one order of magnitude higher than that of CLN∶Fe crystal.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2003年第5期454-457,共4页
Journal of The Chinese Ceramic Society
基金
国家基础研究 973计划资助项目(G19990 3 3 0)
国家高科技发展 863计划资助项目(2 0 0 1AA3 13 0 4)
关键词
近化学计量比
掺铁铌酸锂
晶体生长
光学性能
研究
提拉法
顶部籽晶溶液
iron doped lithium niobate crystal
near stoichiometric
optical properties
Czochralski method
top seeded solution growth
