翻译成英文：由于陶瓷反射器的内径越小晶体的吸收效率越高14因此我们在保证晶体冷却效果的前提下将反射器的内径设计为最小的8 mm玻璃管内径设计为6 mm此时LD发光面到晶体轴中心的距离仅为6 mm能够在晶体棒中获得较高的抽运光功率密度有利于实现高功率激光输出。

Due to the fact that the smaller the inner diameter of the ceramic reflector, the higher the absorption efficiency of the crystal [14], we designed the inner diameter of the reflector to be a minimum of 8 mm and the inner diameter of the glass tube to be 6 mm, while ensuring the cooling effect of the crystal. At this point, the distance from the LD emitting surface to the center of the crystal axis is only 6 mm, which enables a higher pumping light power density in the crystal rod, and is conducive to achieving high-power laser output