Ertel K, Banerjee S, Mason P D, Phillips P J, Siebold M, Hernandez-Gomez C, Collier J C
Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot, UK.
Opt Express. 2011 Dec 19;19(27):26610-26. doi: 10.1364/OE.19.026610.
We present a numerical model of a pulsed, diode-pumped Yb:YAG laser amplifier for the generation of high energy ns-pulses. This model is used to explore how optical-to-optical efficiency depends on factors such as pump duration, pump spectrum, pump intensity, doping concentration, and operating temperature. We put special emphasis on finding ways to achieve high efficiency within the practical limitations imposed by real-world laser systems, such as limited pump brightness and limited damage fluence. We show that a particularly advantageous way of improving efficiency within those constraints is operation at cryogenic temperature. Based on the numerical findings we present a concept for a scalable amplifier based on an end-pumped, cryogenic, gas-cooled multi-slab architecture.
我们提出了一种用于产生高能量纳秒脉冲的脉冲二极管泵浦Yb:YAG激光放大器的数值模型。该模型用于探究光光效率如何取决于诸如泵浦持续时间、泵浦光谱、泵浦强度、掺杂浓度和工作温度等因素。我们特别着重于在实际激光系统所施加的实际限制条件下找到实现高效率的方法，例如有限的泵浦亮度和有限的损伤通量。我们表明，在这些限制条件下提高效率的一种特别有利的方法是在低温下运行。基于数值研究结果，我们提出了一种基于端面泵浦、低温、气体冷却的多片式结构的可扩展放大器概念。
