摘要
实验中,生长、极化、制备出了掺0.02%和0.04%Mn钾钠铌酸锶钡晶体样品,并对其二波耦合、二波耦合响应时间及自泵浦相位共轭进行了测量.研究发现:掺Mn可以有效地增加钾钠铌酸锶钡晶体的吸收,在波长632.8nm,0.02%Mn晶体样品的二波耦合增益系数大于7cm-1而0.04%Mn晶体样品的二波耦合增益系数大于9cm-1,0.04%Mn晶体样品二波耦合增益时间响应比0.02%Mn晶体样品二波耦合增益时间响应快近4倍;0.04%Mn晶体样品有很高自泵浦相位共轭反射率,高达70%.
The Mn doped potassium sodium strontium barium niobate crystals are grown, poled and polished and their two wave coupling, two wave coupling time response and self pumped phase conjugation at 632 8 nm are studied in the experiment. The two wave coupling gain are larger than 7 cm -1 and 9 cm -1 for 0 02% and 0 04% samples respectively and the two wave coupling time response of 0 04% sample is four times faster than that of 0 02% sample. Self-pumped phase conjugate reflectivity of 0 04% sample is as high as 70%. It is shown that Mn doipants can effectively increase absorption coefficient and enhance photorefractive properties of potassium soduim strontium barium niobate crystals at red wavelength.
出处
《中山大学学报(自然科学版)》
CAS
CSCD
1996年第6期118-121,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
广东省自然科学基金
关键词
光折变
二波耦合
钾钠铌酸锶钡
晶体
锰
掺杂
photorefractive effect, two wave coupling, self pumped phase conjugation