帮我润色下面这段话并翻译为中文： LD的快轴发散角为35°其发光面与晶体棒轴线的距离为6 mm保证了几乎所有抽运光直接被晶体吸收提高吸收效率。

The fast axis divergence angle of LD is 35°, and the distance between its emitting surface and crystal rod axis is 6 mm, ensuring that almost all pump light is directly absorbed by the crystal, thus improving the absorption efficiency.

LD的快轴发散角为35度，发光面与晶体棒轴线的距离为6毫米，这保证了几乎所有的抽运光直接被晶体吸收，从而提高了吸收效率。