Muchow Markus, Büchner Torsten, Sprafke Alexander, Seifert Gerhard
Opt Express. 2015 Dec 28;23(26):33540-9. doi: 10.1364/OE.23.033540.
Highly efficient volume phase gratings have been fabricated in low-iron soda lime glass using femtosecond (fs) laser pulses with 1030 nm wavelength and 270 fs pulse duration. Optical simulations based on rigorous coupled-wave analysis theory were performed to determine optimal grating parameters and designs for the application of the gratings for light management in solar modules, suggesting a very effective blazed-like design. Several of such blazed phase gratings have been fabricated and analyzed by measuring their diffraction efficiencies into first and higher orders. Up to 77% of the incoming light in the wavelength region relevant for silicon-based photovoltaics were diffracted by these gratings. Typical induced refractive index changes between 0.002 and 0.006 were derived by comparing the experimental efficiencies with the simulation results.
利用波长为1030 nm、脉冲持续时间为270 fs的飞秒（fs）激光脉冲，在低铁钠钙玻璃中制备了高效体相位光栅。基于严格耦合波分析理论进行了光学模拟，以确定用于太阳能模块光管理的光栅的最佳参数和设计，提出了一种非常有效的类似闪耀光栅的设计。通过测量几个这种闪耀相位光栅的一阶和高阶衍射效率对其进行了制备和分析。这些光栅在与硅基光伏相关的波长区域内，能使高达77%的入射光发生衍射。通过将实验效率与模拟结果进行比较，得出典型的诱导折射率变化在0.002至0.006之间。
