论文部分内容阅读
基于速率方程和腔内光传输方程,推导了纵向抽运准三能级连续激光器的抽运吸收效率、斜率效率、腔内基波几何平均光强、激光阈值、激光输出光强和功率的显式解析表达式。讨论了抽运吸收饱和效应对抽运吸收效率、激光阈值、激光转换效率和腔内基波几何平均光强的影响。理论分析和数值模拟表明,抽运饱和效应对激光性能的影响与抽运吸收截面和激光发射截面的比值、平均单程损耗因子、抽运能级与激光上下能级的粒子数布居因子及晶体长度等因素有关。当晶体越短、抽运吸收截面和激光发射截面的比值越大、腔损耗越大时,抽运吸收饱和效应越明显。抽运吸收效率的下降会导致激光阈值升高、腔内基波几何平均光强以及激光转换效率的下降。
Based on the velocity equation and the cavity optical transmission equation, the pumping absorption efficiency, slope efficiency, geometric mean light intensity of the fundamental wave in the cavity, laser threshold, laser output light intensity and power were deduced Parse expression. The effect of pumping absorption saturation on pumping absorption efficiency, laser threshold, laser conversion efficiency and geometrical average light intensity of cavity fundamental wave is discussed. Theoretical analysis and numerical simulation show that the effect of pumping saturation on the laser performance, the ratio of pumping absorption cross section and laser emission cross section, the average one-way loss factor, the pumping energy level and the number of particles at the upper and lower laser levels, Length and other factors. When the crystal is shorter, the ratio of pumping absorption cross section and laser emission cross section is larger, and the larger the cavity loss, the more obvious the pumping absorption saturation effect. The drop in pumping absorption efficiency leads to an increase in the laser threshold, a geometric mean light intensity in the cavity, and a decrease in the laser conversion efficiency.