XLIM Research Institute-UMR CNRS 6172, Faculté des Sciences et Techniques, Université de Limoges,87060 Limoges, France.
Opt Lett. 2010 Jan 15;35(2):145-7. doi: 10.1364/OL.35.000145.
We experimentally demonstrate strong second-harmonic-generation from a self-induced all-optical poling in germanium-doped fiber with a subnanosecond laser pump at 1064 nm. The large second-harmonic conversion efficiency allows nonlinear spectral broadening at visible wavelengths so that up to nine distinct Raman sidebands have been obtained. In this work we emphasize how the Raman scattering, induced from the pump in the IR region, can drastically affect the optical poling effect, limiting in turn second-harmonic generation.
我们通过实验演示了在掺锗光纤中通过纳秒激光泵浦 1064nm 波长的光实现自感应全光极化，产生强的二次谐波。大的二次谐波转换效率允许在可见光波长下进行非线性光谱展宽，从而获得了多达九个明显的拉曼边带。在这项工作中，我们强调了来自红外区泵浦的拉曼散射如何剧烈地影响光极化效应，从而限制了二次谐波的产生。
