Wang Yun, Lee Timothy, De Lucia Francesco, Abdul Khudus Muhammad I M, Sazio Pier J A, Beresna Martynas, Brambilla Gilberto
Opt Lett. 2017 Nov 15;42(22):4671-4674. doi: 10.1364/OL.42.004671.
We simulate and experimentally demonstrate deep ultraviolet generation from a 1550 nm laser source in a fully fiberized system by cascading second- and third-harmonic generation using a periodically poled silica fiber and an optical sub-micron diameter fiber. Harmonic generation is achieved by harnessing intermodal phase matching in optical microfibers and a permanent χ induced via thermal poling. As a result, efficient nonlinear processes can be observed, despite the low third-order nonlinear susceptibility of silica glass.
我们通过使用周期性极化石英光纤和光学亚微米直径光纤级联二次谐波和三次谐波产生，在全光纤系统中模拟并通过实验证明了从1550纳米激光源产生深紫外光。谐波产生是通过利用光学微纤维中的模式间相位匹配和热极化诱导的永久χ来实现的。结果，尽管石英玻璃的三阶非线性极化率较低，但仍能观察到有效的非线性过程。
