The results indicate that for the same pump intensity , the temperature and thermal stress distribution in the disk are not only related with the medium ' s geometry and the special distribution of pump intensity but also related with the fill factor of pump area 结果表明,在相同的抽运功率密度下,激光介质中的温度分布和热应力分布不仅与激光介质几何构型及抽运光空间分布有关,还与抽运光斑在介质表面的填充因子密切相关。
When the fill factor is less than 1 , the concentrated tensile stress appeares near edge of disk surface , while the fill factor reaches up to 1 , the surface exhibites compressive stress , and the center is less tensile stress 当抽运光斑未充满激光介质时,介质的表面靠近边缘处会出现大的拉应力集中,并且介质表面的最大轴向位移和最大拉应力随光斑填充因子增大而增大;而当抽运光充满介质时,表面是压应力,较小的拉应力存在于介质内部。
The braiding parameters include the dimensions of sample , the braiding yarn of main part , the volume proportion of each region to whole structure , the size of the braiding yam , the yarn packing factor , the fiber volume fraction , the braiding angle and the braiding pitch length 主要的编织结构参数包括试件的外形尺寸、主体纱行数和列数,三个区域各自所占的体积百分比、编织纱线的细度、纱线填充因子、纤维体积含量、编织角以及编织花节长度。
Key technologies and its mechanism for improving crystalline silicon solar cells in the scale manufacture have been researched in this thesis . after sioa surface passivation and forming gas treatment utilization in the scale manufacture , the surface recombination and series resistance of solar cells have been reduced while their open - circuit voltage , fill factor and efficiency improved 本论文研究了提高晶体硅太阳电池效率规模化生产工艺技术的主要环节和相关机理,将sio _ 2表面钝化、 forminggas处理用于规模化生产,降低了太阳电池的表面复合速度和串联电阻,提高了开路电压、填充因子和转换效率。