激光二极管抽运的自拉曼Nd∶YVO_4激光器

研究了激光二极管(LD)抽运的自拉曼Nd∶YVO4调Q激光器的特性。Nd∶YVO4晶体同时作为激光介质和拉曼晶体,通过声光调Q技术,产生了1176 nm的拉曼激光。测量了平均输出功率、脉冲宽度和单脉冲能量随抽运功率和脉冲重复率的变化。典型的1064 nm基频光和1176 nm拉曼光脉冲的脉冲宽度分别为26.3 ns和9.0 ns。在脉冲重复率为20 kHz,抽运功率为8.46 W时,产生了平均功率为0.384 W的1176 nm光的输出,光-光转换效率为4.54%。使用速率方程对自拉曼Nd∶YVO4调Q激光器特性进行了理论研究,把脉冲重复率为10 kHz,20 kHz,30 kHz时拉曼光单脉冲能量和脉冲宽度的实验值与理论值进行了比较,结果基本相符。

Laser Diode-Pumped Nd∶YVO4Self-Stimulated Raman Laser

A 1176 nm Raman laser is obtained by use of self-frequency Raman conversion in a laser diode-pumped actively acousto-optically Q-switched Nd∶YVO4 1064 nm laser. The characteristics including the average output power, pulse width and pulse energy versus incident pump power and pulse repetition rates are measured. The widths of the typical fundamental pulses at 1064 nm and the Raman pulses at 1176 nm are 26.3 ns and 9.0 ns, respectively. At a repetition rate of 20 kHz and an incident pump power of 8.46 W, an average output power of 0.384 W at 1176 nm and an optical-to-optical conversion efficiency of 4.54% are obtained. The rate equations are used to describe the performance of the self-Raman actively Q-switched Nd∶YVO4 laser. Experimentally measured and theoretically calculated pulse energies and pulse widths at 1176 nm for the pulse repetition rates of 10, 20, and 30 kHz are compared, the theoretical results are in agreement with the experimental results on the whole.