激光二极管抽运Nd∶YVO_4和频黄光激光器的理论及实验研究  

Theoretical and Experimental Study of LD Pumped Nd∶YVO4 Yellow Laser with Sum-Frequency Generation

作　　者：张峻诚[1] 王加贤[1] 苏培林[1] 韩磊[1] 熊刚强[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《光学学报》2008年第12期2365-2369,共5页Acta Optica Sinica

基　　金：福建省自然科学基金(A0610023)资助课题

摘　　要：为了达到最佳和频593nm黄色激光输出,采用激光二极管(LD)端面抽运Nd∶YVO4晶体,根据四能级系统的速率方程理论,建立了空间相关的两波长激光运转速率方程模型,由此导出两波光子数表达式。对LD端面抽运Nd∶YVO4/KTP三镜复合腔结构的腔内和频黄光激光器,在满足参与和频的两基频光光子数密度相等的条件下,理论上得到了谐振腔的各个参数。实验比较了在满足两波光子数密度相等和两波振荡阈值相等两种情况下激光器输出的593nm黄色激光功率。在抽运功率为12W时,二种情况下分别得到了410mW和340mW的黄光输出,光-光转换效率分别为3.4%和2.8%。由此可见,在满足两波光子数密度相等的条件下可以得到更高转换效率的和频黄光输出。In order to attain optimal sum-frequency 593 nm yellow laser, using LD end-pumped Nd： YVO4, starting from the four-level system rate equations, a theoretical model of the spatial related dual-wavelength rate-equation was established and dual-wavelength photon number expression was conducted. The parameters of the three-mirror compound resonator were theoretically obtained for the LD end-pumped Nd： YVO4/KTP yellow laser with sumfrequency in the case of equal dual-wavelength photon number density. The output power of 593 nm yellow laser was experimentally compared under the conditions that dual-wavelength laser photon number density was equal and the dual-wavelength laser oscillation threshold was equal. Output power of 593 nm yellow laser was respectively 410 mW and 340 mW, and the conversion efficiency was 3.4% and 2.8% in the two cases with 12 W pump power. The experimental results show that more efficiency yellow laser can be obtained in the case of equal dual-wavelength photon number density.

关 键 词：激光技术 腔内和频激光器 三镜复合腔 速率方程 两波光子数密度 

分 类 号：TN248.1[电子电信—物理电子学]