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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。
The characteristics of self-Raman Nd:YVO4 Q-switched laser with laser diode (LD) pumping are studied. The Nd: YVO4 crystal, at the same time as the laser medium and the Raman crystal, produced a Raman laser at 1176 nm by the acousto-optic Q-switched technique. The average output power, pulse width, and single-pulse energy were measured as a function of the pump power and pulse repetition rate. The typical 1064 nm fundamental and 1176 nm Raman pulses have pulse widths of 26.3 ns and 9.0 ns, respectively. At a pulse repetition rate of 20 kHz and a pumping power of 8.46 W, an output of 1176 nm light with an average power of 0.384 W was produced with an optical-to-optical conversion efficiency of 4.54%. The rate of Raman Nd:YVO4 Q-switched Q-switched laser has been theoretically studied. The experimental results and theoretical values of Raman single-pulse energy and pulse width at pulse repetition rates of 10 kHz, 20 kHz and 30 kHz Comparison, the results are basically consistent.