Sun P, Zuo D, Wang X, Han J, Heaven M C
Opt Express. 2020 May 11;28(10):14580-14589. doi: 10.1364/OE.392810.
Optically pumped rare gas lasers (OPRGLs) have shown great potential to generate high energy laser radiation with high beam quality. As an alternative to the diode-pumped alkali vapor lasers (DPALs), they have similar working principles and characteristics, but OPRGLs have the advantage that the gain medium is chemically inert and is appropriate for closed-cycle operation. One of the challenges OPRGLs are faced with is the bottleneck caused by the slow 1s-1s collisional relaxations at room temperature. A 1s-2p dual-wavelength pump method had been proposed to transfer the populations pooled on the 1s level to the lasing cycle using a steady-state laser model. We explored this method further through 1s-2p and 1s-2p dual-wavelength pump schemes. The enhancement efficiencies at room temperature for a repetitively pulsed discharge, CW dual-wavelength pump system were examined using a dynamic model, and an experiment with a pulsed secondary pump was conducted for qualitative evaluations.
光泵浦稀有气体激光器（OPRGL）在产生具有高光束质量的高能量激光辐射方面显示出巨大潜力。作为二极管泵浦碱金属蒸汽激光器（DPAL）的替代方案，它们具有相似的工作原理和特性，但OPRGL的优势在于增益介质化学性质稳定，适合于闭环运行。OPRGL面临的挑战之一是室温下1s-1s碰撞弛豫缓慢导致的瓶颈效应。有人提出了一种1s-2p双波长泵浦方法，利用稳态激光模型将聚集在1s能级上的粒子数转移到激光循环中。我们通过1s-2p和1s-2p双波长泵浦方案进一步探索了该方法。使用动态模型研究了重复脉冲放电、连续波双波长泵浦系统在室温下的增强效率，并进行了脉冲二次泵浦实验以进行定性评估。
