光学学报, 2006, 26 (5): 689, 网络出版: 2006-06-01
退压式La3Ga5SiO14晶体电光调Q Nd∶YAG激光器激光性能研究
Study of a Nd∶YAG Laser with Voltage-Decreased Electro-Optical Q-Switch of Optical Activity Crystal La3Ga5SiO14
激光器件 电光Q开关 旋光性 电光效应 硅酸镓镧(La3Ga5SiO14)晶体 laser device electro-optical Q-switch optical rotation electro-optical effect La3Ga5SiO14 crystal
摘要
通过对硅酸镓镧(LGS)晶体旋光性与电光效应的交互作用的理论研究,推导出晶体旋光性和电光效应共同作用下的光强表示式I=1-4B2(Asin2ω-Ccos2ω)2。利用此表示式设计计算了旋光晶体LGS尺寸为8 mm×8 mm×25 mm电光Q开关在1064 nm波长使用时的开关电压和偏振角分别为4995 V和27.3°。将理论研究得到的结论应用于LGS晶体电光调Q的Nd∶YAG 晶体激光器的实验研究中,实验结果与理论计算结果基本一致。得到输出能量为361 mJ,脉冲宽度为7.8 ns的脉冲激光输出。
Abstract
The interaction between the optical rotation and electro-optic effect has been studied. The express equation of the emitted light intensity under the interaction of the optical rotation and electro-optic effect is given, which is I=1-4B2(Asin2ω-Ccos2ω)2. According to the theoretical equation, the shutdown voltage and polarization plane angle for a Q-switch of La3Ga5SiO14 (LGS) crystal with the size of 8 mm×8 mm×25 mm for the wavelength of 1064 nm are calculated to be 4995 V and 27.3°, which is validated by the experiment of a voltage-decreased electro-optical Q-switched Nd∶YAG laser. The experimental results are in basic agreement with the calculation values. The output energy of 361 mJ and the pulse width of 7.8 ns are obtained.
张少军, 田召兵, 尹鑫, 张怀金, 王青圃, 李世忱. 退压式La3Ga5SiO14晶体电光调Q Nd∶YAG激光器激光性能研究[J]. 光学学报, 2006, 26(5): 689. 张少军, 田召兵, 尹鑫, 张怀金, 王青圃, 李世忱. Study of a Nd∶YAG Laser with Voltage-Decreased Electro-Optical Q-Switch of Optical Activity Crystal La3Ga5SiO14[J]. Acta Optica Sinica, 2006, 26(5): 689.