光子学报, 2005, 34 (1): 29, 网络出版: 2006-06-12
准相位匹配周期极化掺镁铌酸锂490 nm倍频连续输出
Continuous-wave Quasi-phase-matched Second Harmonic Generationat 490 nm in Periodically Poled MgO:LiNbO3
周期极化掺镁铌酸锂光学微结构 准相位匹配 倍频 Periodically poled micro-structure MgO∶LiNbO 3 Quasi-phase-matched Double frequency
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~5.5 kV/mm,在厚为1 mm、长为20 mm、宽为18 mm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980 nm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800 mW时,产生约40 mW的490 nm的倍频光,其对应转换效率为5%,实验过程中未见绿致吸收光折变现象.
Abstract
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.
陈云琳, 郭娟, 刘晓娟, 吴朝晖, 宋峰, 罗勇锋, 张万林, 孔勇发, 许京军. 准相位匹配周期极化掺镁铌酸锂490 nm倍频连续输出[J]. 光子学报, 2005, 34(1): 29. 陈云琳, 郭娟, 刘晓娟, 吴朝晖, 宋峰, 罗勇锋, 张万林, 孔勇发, 许京军. Continuous-wave Quasi-phase-matched Second Harmonic Generationat 490 nm in Periodically Poled MgO:LiNbO3[J]. ACTA PHOTONICA SINICA, 2005, 34(1): 29.