准相位匹配周期极化掺镁铌酸锂490nm倍频连续输出  

Continuous-wave Quasi-phase-matched Second Harmonic Generationat 490 nm in Periodically Poled MgO:LiNbO_3

作　　者：陈云琳[1] 郭娟[1] 刘晓娟[1] 吴朝晖[2] 宋峰[2] 罗勇锋[2] 张万林[2] 孔勇发[1] 许京军[1] 

机构地区：[1]南开大学物理学院光电材料研发中心,天津300071 [2]南开大学物理学院光子学中心,天津300071

出　　处：《光子学报》2005年第1期29-31,共3页Acta Photonica Sinica

基　　金：国家自然科学基金 (编号 :10 174 0 4 0 );天津市重点自然科学基金 (0 3380 0 111);天津市国际合作项目资助课题

摘　　要：在室温下通过外加电场极化法 ,首次用较低的极化开关电场～ 5 .5kV/mm ,在厚为 1mm、长为 2 0mm、宽为 18mm的掺镁铌酸锂基片上成功的制备了周期为 4 .8～ 5 .2 μm的一阶准相位匹配倍频光学微结构 ;并在室温下 ,以波长为 980nm的半导体激光器为基频光源 ,对所研制的微结构样品进行倍频通光实验 ,在入射基频光为 80 0mW时 ,产生约 4 0mW的 4 90nm的倍频光 ,其对应转换效率为 5 % 。A first order quasi-phase-matched periodically poled micro-structure MgO∶LiNbO 3 for SHG with 4.8～5.2 μm period, 20 mm length, 18 mm width and 1 mm thickness has been successfully fabricated by applying an external field at room temperature. Because the switching field of MgO∶LiNbO 3 is ～5.5 kV/mm, which is approximately one fourth that of the conventional congruent field, periodic poling of thicker MgO∶LiNbO 3 substrates was successfully performed by means of an electric field poling process at room temperature. Using the sample to double the frequency of a diode laser at 980 nm was studied. About 40 mW of CW 490 nm blue light was obtained pumped by 800 mW of the fundamental power, which corresponds to 5% power conversion efficiency. No obvious optical damage has been observed.

关 键 词：周期极化掺镁铌酸锂光学微结构 准相位匹配 倍频 

分 类 号：O437[机械工程—光学工程] TN252[理学—光学]