帮我润色下面这段话：三个LD Bar条Focus Light 美国呈120°中心对称分布环绕在一个内径为55 mm厚度为05 mm的陶瓷漫反射器表面每个LD Bar条的最大输出功率约为220 W此激光模块可以提供660W的最大抽运功率。 LD的快轴发散角为35°发光面与晶体棒轴线的距离为6 mm这保证了几乎所有抽运光可以直接被晶体吸收提高吸收效率。TmYAG具有两个吸收带分别位于781nm和785

Three LD Bar strips (Focus Light, USA) are symmetrically distributed around a ceramic diffuse reflector surface with a 120° angle, with an inner diameter of 5.5mm and a thickness of 0.5mm. Each LD Bar strip has a maximum output power of approximately 220W, allowing the laser module to provide a maximum pumping power of 660W. The fast-axis divergence angle of the LD is 35°, and the distance between the emitting surface and the crystal rod axis is 6mm, ensuring that almost all pumping light can be directly absorbed by the crystal, improving absorption efficiency. Tm:YAG has two absorption bands, located near 781nm and 785nm [15]. The center wavelength of the LD Bar strip we selected is 780.5nm at maximum driving current, and the emission spectral line has a full width at half maximum (FWHM) of approximately 1.7nm. Therefore, the Tm:YAG's wider 781nm absorption band can be matched within a larger range of driving current variations