半导体激光直接倍频的488nm蓝光激光器  

480 nm Blue Laser by Direct Frequency Doubling of Laser Diode

作　　者：董景星[1] 楼祺洪[1] 成序三[1] 凌磊[1] 魏运荣[1] 叶震寰[1] 周军[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2006年第4期567-570,共4页Acta Optica Sinica

基　　金：国家自然科学基金(10334110);南京大学固体微结构物理实验室资助课题

摘　　要：利用波导型准相位匹配周期极化反转铌酸锂(PPLN)晶体直接倍频波长为976 nm的连续半导体激光二极管,在最佳晶体工作温度(28℃)下,获得了波长为488 nm的连续蓝光输出,最大输出功率大于20 mW。所用的晶体尺寸为8 mm×1.4 mm×1 mm,波导截面为4.5μm×3.5μm,极化周期为5.2μm。研究了波导型周期极化反转铌酸锂晶体的倍频效率与温度的关系,与普通的周期极化反转铌酸锂相比,倍频效率与温度关系的敏感度较低。同时,由于晶体可以在室温下工作,简化了加温与温控部件,提高了整机的工作效率。在此实验的基础上,制成了一台小型的全固态488 nm连续蓝光激光器。A compact continuous-wave blue laser at 488 nm, with the maximum output exceeding 20 mW at the optimum work temperature of crystal 28℃, is demonstrated by direct frequency doubling of a laser diode （LD） with a quasi-phase matched waveguide periodically poled lithium niobate （PPLN） crystal. The size of the crystal is 8 mm X 1.4 minx 1 mm, and the waveguide section is 4.5 μm × 3.5μm, with 5.2 μm poling period. The temperature characteristic of the second harmonic generation （SHG） in the waveguide PPLN is investigated. The results show that the dependence of the waveguide PPLN crystal on the temperature is less than that of normal PPLN. Because the crystal works near the room temperature, the temperature controlling devices are simplified and the work efficiency of the whole system is improved. Based on the experiments, a compact all-solid state 488 nm blue laser with continuous wave output is made.

关 键 词：激光器 波导 准相位匹配 周期极化反转铌酸锂 倍频 

分 类 号：TN722[电子电信—电路与系统]