Krol D M, Simpson J R
Opt Lett. 1991 Nov 1;16(21):1650-2. doi: 10.1364/ol.16.001650.
The presence of defect states in the band gap is an essential ingredient of recent models of photoinduced second-harmonic generation (SHG) in fibers. We have created such states by doping aluminosilicate glass fibers that do not contain Ge with Ce or Eu and observed SHG from 1.06-microm light after preparation of the fibers with 0.532- and 1.06-microm light. In an aluminosilicate fiber doped with 0.008 wt. % Ce, the SHG conversion efficiency is as high as 1.5% at infrared (1.06-microm) peak powers of 200 W.
带隙中缺陷态的存在是近期光纤中光致二次谐波产生（SHG）模型的一个基本要素。我们通过用Ce或Eu掺杂不含Ge的铝硅酸盐玻璃纤维来产生这样的状态，并在用0.532微米和1.06微米光制备纤维后，观察到了来自1.06微米光的二次谐波。在掺杂了0.008 wt.% Ce的铝硅酸盐纤维中，在200 W的红外（1.06微米）峰值功率下，二次谐波转换效率高达1.5%。
