边缘抽运复合Yb:YAG/YAG薄片激光器设计与功率扩展

Edge-pumped composite thin-disc Yb:YAG/YAG laser: design and power scaling

设计了边缘抽运复合Yb :YAG YAG薄片激光器 .薄片激光器的显著优点是热梯度和激光传输方向相同 ,减小了横向的温度梯度 ,解决了高功率激光器冷却和高功率抽运的矛盾 ,避免了放大的自发辐射 .与高功率棒状和板条激光器相比 ,一维空间冷却理论和边缘抽运理论可以获得更高的功率输出 ,列举了两种高功率Yb :YAG YAG薄片激光器设计实例 .

The design uses a composite Yb:YAG/YAG disc laser configuration with the pump light incident from the disc edge. The crucial advantages of the thin-disc design is that the thermal gradients are aligned with the beam propagation direction, the transverse temperature gradients are reduced, previous difficulties with high average power pumping/cooling and the rejection of amplified spontaneous emission are resolved. In contrast to high power rods or slabs, the one-dimensional nature of the cooling geometry and the edge-pump geometry scale gracefully to very high average power. Two point designs illustrating power scaling are also given as examples.