采用油相法合成了CdSe/CdS/ZnS量子点, 相对于CdSe量子点, 其吸收光谱、发射光谱均发生了红移。利用COMSOL Multiphysics软件模拟CdSe/CdS/ZnS量子点光纤和甲苯光纤的电场分布, 结果表明CdSe/CdS/ZnS量子点光纤的电场强度高于甲苯光纤。采用中心波长为532 nm的稳态半导体激光器作为光源, 对甲苯光纤、CdSe/ZnS量子点光纤、CdSe/CdS/ZnS量子点光纤进行电压信号测试, 发现CdSe/ZnS量子点光纤和CdSe/CdS/ZnS量子点光纤的电压信号值相对于甲苯光纤电压信号值分别增强了6.28 mV和18.43 mV, 表明双壳型量子点光纤的增益高于单壳型量子点。
光纤光学 量子点 红移 光谱分析 增益 fiber optics quantum dots red shift spectroscopic analysis gain
1 长春理工大学物理系, 吉林 长春 130022
2 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
3 北京跟踪与通讯技术研究所, 北京 100094
通过优化设计激光谐振腔,实现了激光二极管(LD)抽运腔内三次谐波转换355 nm紫外激光器的高效率输出。实验中采用复合腔结构,利用BIBOⅠ类临界相位匹配进行腔内和频, 当注入到Nd:YAG和Nd:YVO4晶体的抽运功率分别为20 W和8 W时,获得最大功率为114 mW的TEM00连续波355 nm的紫外激光输出,光-光转换效率为0.4%,4 h功率稳定度优于±3.2%。
激光器 全固态激光器 复合腔 和频 紫外激光
Author Affiliations
Abstract
Department of Physics, Changchun University of Sciences and Technology, Changchun 130022
Efficient continuous-wave (CW) intracavity frequency doubling of a diode-end-pumped Nd:GdVO4 laser operating on 4F_(3/2)-4I_(9/2) transitions at 912 nm has been demonstrated. A symmetrical cavity with two laser rods is designed, which divides the pump power between the two laser rods, allowing for greater power scalability. An 18-mm-long BiBO crystal, cut for critical type I phase matching, is used for the intracavity frequency-doubled laser. A maximum output power of 6.2 W in the blue spectral range at 456 nm has been achieved with the pump power of 36 W. The beam quality M2 value is 2.5 in both horizontal and vertical directions. The ellipticity of the deep blue laser is 0.98, and the power stability is better than 3.2% at the maximum output power.
深蓝光 Nd:GdVO4 倍频 固体激光器 140.3530 Lasers, neodymium 140.3480 Lasers, diode-pumped 140.7300 Visible lasers 140.3580 Lasers, solid-state Chinese Optics Letters
2007, 5(7): 407
