摘要
对激光二极管端面抽运Tm,Ho∶YLF晶体声光调Q激光器的激光特性进行了研究。根据粒子跃迁和能量传递过程,在考虑能级传递上转换的前提下,建立了Tm,Ho∶YLF脉冲激光器的速率方程,得到了初始反转粒子数的解析表达式,分析了能量传递上转换效应对激光上能级反转粒子数的影响。在室温下实现了2μm波长激光的脉冲输出。实验上给出并分析了Tm,Ho∶YLF脉冲激光器的平均输出功率、单脉冲能量和脉冲宽度随抽运功率以及声光Q开关调制频率的变化关系。在抽运功率为2.8W,重复频率为9kHz时,获得了平均输出功率为189mW的激光脉冲,光光转换效率为6.8%。在重复频率为1kHz时,得到最大单脉冲能量为65μJ,峰值功率为0.17kW。
A laser-diode pumped actively Q-switched Tm,Ho：YLF laser is reported. The rate equation of Tm,Ho：YLF Q-switched laser is given including the energy transfer upconversion effect and the analytical expression of initial number of reversion particles is obtained. The influence of energy transfer upconversion effect on the number of upper level reversion particles is analyzed. At room temperature, 2μm wavelength pulse output is realized.Average output power, single pulse energy and pulse width are measured at different pump power and different repetition rates. The average output power of 189 mW and a optical-optical efficiency of 6.8% are obtained at the repetition rate of 9 kHz and the pump power of 2.8 W. The maximum single pulse energy of 65 μJ and peak power of 0.17kW are obtained at the repetition rate of 1 kHz.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2005年第8期1072-1076,共5页
Acta Optica Sinica
基金
哈尔滨工程大学基础研究基金(HEUF04014)资助课题。
