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一种基于铌酸锂晶体的高效紧凑腔内倍频绿光激光器 被引量:10

A Compact and Highly Efficient Intracavity Frequency-Doubled Green Laser Based on Periodically Poled Lithium Niobate
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摘要 基于周期极化铌酸锂(PPLN)晶体提出并设计了一种高效紧凑腔内倍频绿光激光器。该激光系统采用808 nm激光二极管(LD)端面直接抽运Nd∶YVO4晶体,进而利用极化周期为7μm的PPLN晶体倍频产生532 nm绿光。通过在Nd∶YVO4和PPLN晶体端面镀膜构成激光腔镜,无需采用任何光学透镜、反射镜等分立光学元件,大大降低了系统体积和成本。实验结果显示,当激光器谐振腔腔长为12 mm,抽运功率为4.1 W时,绿光输出功率可达1.343 W,相应的光-光转换效率达32.8%。当LD抽运功率稳定在3.33 W时,2 h内的绿光输出功率波动小于5%。 A compact and highly efficient intracavity frequency-doubled green laser has been researched and designed based on periodically poled lithium niobate (PPLN) crystal. The laser system adopts a 808 nm laser diode (LD) end directly pumped Nd : YVO4 crystal, then uses a poling period of 7 μm of PPLN crystal to generate 532 nm green light by frequency-doubling. The coating Nd : YVO4 and PPLN crystals compose a laser cavity, without using any discrete optical components such as optical lens, reflector, thus reducing the volume and cost of the system. The experimental results show that with the resonator cavity length being set at 12 mm, pump power at 4.1 W, the green light output power of 1.343 W and the corresponding optical-optical conversion efficiency of 32.8% are achieved. Controlling the incident pump power at about 3.33 W, the fluctuation of green light output power within 2 h is less than 2%.
出处 《中国激光》 EI CAS CSCD 北大核心 2015年第11期8-13,共6页 Chinese Journal of Lasers
基金 国家自然科学基金(11374161) 江苏省信息与通信工程优势学科 中国博士后科学基金(2015M571781) 江苏省博士后基金(1401022B)
关键词 激光器 非线性光学 绿光激光器 倍频 铌酸锂晶体 lasers nonlinear optics green laser frequency-doubled lithium niobate crystal
作者简介 桂诗信(1989-),男,硕士研究生,主要从事非线性光频转换方面的研究。E-mail:guishixin0001@163.com 导师:常建华(1976-),男,博士,教授,博士生导师,主要从事光子学与光器件、光电传感技术等方面的研究。E-mail:jianhuachang@nuist.edu.cn
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