摘要
为了研究LD抽运的被动调Q Nd:YAG/GdVO_4内腔式喇曼激光器的输出特性,采用Nd:YAG作为激光介质,GdVO_4晶体作为喇曼介质,分别用两块不同初始透过率的Cr^(4+):YAG晶体,得到并比较了采用不同初始透过率的Cr^(4+):YAG晶体时被动调Q喇曼激光器的性能。测量了平均输出功率、脉冲宽度和脉冲重复率随抽运功率的变化关系。当Cr^(4+):YAG的初始透过率为91%、输入功率是5.2W时,得到的喇曼光的最高功率为150.6mW,相应的转换效率为2.9%。结果表明,通过数值求解基频光和喇曼光空间分布的速率方程并应用到被动调Q内腔式喇曼激光器,获得的理论结果与实验结果大致相符。
In order to study of output characteristics of a laser diode pumped passively Q-switched Nd： YAG/C, dVO4 intracavity Raman laser, taking Nd： YAG as the gain crystal, GdVO4 as the Raman medium, and two Cr4＋ ： YAG crystals with different initial transmissions as the saturable absorber respectively, the passively Q-switched operation of the Nd： YAG/GdVO4 Raman laser at 1174nm was investigated and compared. The average power, pulse energy, pulse width and pulse repletion rate of diode pumped passively Q-switched Nd： GdVO4 self-Raman laser at 1174nm with respect to the injected pump power were measured. The obtained maximum output average power was 150. 6mW with respect to injected power of 5. 2W and the corresponding conversion efficiency was 2. 9% in the case of the initial transmission of 91%. The theoretical results were obtained according to the rate equations, in which the Gaussian distribution of the intraeavity photon density of the fundamental and Raman laser and the initial population inversion density were taken into account. The obtained theoretical results were in agreement with the experimental results on the whole.
出处
《激光技术》
CAS
CSCD
北大核心
2011年第3期398-402,共5页
Laser Technology
基金
曲阜师范大学博士科研启动基金资助项目
