Shu Hong, Chen Ying, Bass Michael, Monjardin J Fernando, Deile Jochen
College of Optics and Photonics, CREOL, FPCE, and Townes Laser Institute, University of Central Florida, Orlando, Florida 32816, USA.
Opt Express. 2011 Oct 10;19(21):19875-85. doi: 10.1364/OE.19.019875.
Detailed numerical analyses are presented of a continuous wave (cw), single spatial mode alkali vapor laser pumped by a diffraction-limited Ti: Sapphire laser. These analyses provide insight into the operation of alkali vapor lasers to aid in the development of high power, diode laser pumped alkali vapor lasers. It is demonstrated that in the laser considered the laser spatial pattern is significantly changed after each pass through the gain medium, and the laser spatial pattern in steady state operation is also very different from that of the passive cavity mode. According to the calculation, lasing significantly improves the pump absorption efficiency and changes the absorbed pump distribution. The effect of varying the transverse size of the pumped region is also analyzed and an optimum pump beam waist radius is demonstrated. In addition, the shift of the pump beam waist location is also studied. The computation method and its convergence behavior are also described in detail.
本文对由衍射极限钛宝石激光器泵浦的连续波（cw）单空间模式碱金属蒸汽激光器进行了详细的数值分析。这些分析有助于深入了解碱金属蒸汽激光器的运行情况，以推动高功率二极管泵浦碱金属蒸汽激光器的发展。结果表明，在所考虑的激光器中，激光束每次通过增益介质后，其空间模式都会发生显著变化，并且稳态运行时的激光空间模式也与无源腔模式有很大不同。计算结果表明，激光作用显著提高了泵浦光吸收效率，并改变了吸收泵浦光的分布。此外，还分析了改变泵浦区域横向尺寸的影响，并确定了最佳泵浦光束腰斑半径。同时，研究了泵浦光束腰斑位置的偏移。文中还详细描述了计算方法及其收敛特性。
