按照SCI论文要求润色这段话：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

In order to optimize the absorption efficiency of the crystal, it is essential to minimize the inner diameter of the ceramic reflector [14]. Therefore, we designed the reflector with a minimum inner diameter of 8 mm and the glass tube with an inner diameter of 6 mm, while ensuring efficient cooling of the crystal. This design allows for a shorter distance of only 6 mm from the LD emitting surface to the center of the crystal axis, which results in a higher pumping light power density within the crystal rod. Consequently, this design facilitates the achievement of high-power laser output