In the current paper, a series of nonlinear optical (NLO) active devices was prepared by utilizing stereolithographic three-dimensional printing technique. Microcrystalline NLO active component, urea, or potassium dihydrogen phosphate was dispersed in a simple photopolymerizable polyacrylate-based resin and used as the printing material to fabricate highly efficient transparent NLO lenses. The nonlinear activity of the printed lenses was confirmed by second-harmonic generation measurements using a femtosecond laser-pumped optical parametric amplifier operating at a wavelength of 1195 nm. The three-dimensional printing provides a simple method to utilize a range of NLO active compounds without tedious crystal growing and processing steps. Furthermore, introducing NLO additives in the printing material provides an easy and cost-efficient way to manufacture lenses with NLO functionality.

中文翻译：

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非线性光学镜片的三维印刷

在本文中，利用立体光刻三维印刷技术制备了一系列非线性光学（NLO）有源器件。将微晶NLO活性成分，尿素或磷酸二氢钾分散在简单的可光聚合聚丙烯酸酯基树脂中，并用作印刷材料，以制造高效透明的NLO透镜。通过使用在1195 nm波长下工作的飞秒激光泵浦光参量放大器进行二次谐波生成测量，可以确认印刷镜片的非线性活性。三维打印提供了一种简单的方法，可以利用一系列的NLO活性化合物，而无需繁琐的晶体生长和处理步骤。此外，