目前，贵金属型可饱和吸收体还处在初期发展阶段，其深入的理论和实验研究还有待于进一步开展。本项目拟以基于贵金属型可饱和吸收体的红外脉冲光纤激光器研发为导向，优化选择金纳米聚合物薄膜为材料体系，通过制备工艺的设计与调控，实现对金纳米颗粒的化学组成、结构、形貌、尺寸、排布、在薄膜中的掺杂量、薄膜类型及薄膜厚度等的精细控制，进而探索金纳米聚合物薄膜作为可饱和吸收体被置于光纤腔中调节输出脉冲激光的潜力，最终实现具有低泵浦阈值、窄脉冲宽度和高重复频率的脉冲光纤激光器。研究工作将深入揭示金纳米薄膜的结构与非线性光学特性间的关联，阐明其可饱和吸收特性的产生与作用机理，有望通过金纳米颗粒和薄膜可饱和吸收体的精细设计与优化，获得性能优异的新型多波长可调谐脉冲光纤激光器。相关工作是在前期研究积累基础上的延伸和重要拓展，项目的实施将为设计基于贵金属非线性光学材料的其它新型光电子器件提供理论依据和关键技术。

Recently, noble metal saturable absorbers are in the early developing stage and the theoretical and experimental study of them should be further carried out. Directed by the investigation of infrared pulsed fiber laser based on noble metal saturable absorbers, gold nanostructured polymer films are considered as the key material systems. To meet the challenge of the fabrication of pulsed fiber laser with low pump threshold, short pulse width, and high repetition rate, the precisely controlled growth of the gold nanostructured films is accomplished firstly by tailoring the chemical compositions, structures, shapes, sizes, arrangements, and doping amounts of gold nanoparticles and the thicknesses of various polymer films. Subsequently, the potential of adjusting the output pulse laser is investigated for gold polymer films. The research work will come to disclose the correlation between the structures and nonlinear optical properties of gold nanostructured films and clarify the generation and action mechanism of their saturable absorption properties, which makes them promising for building novel pulse fiber laser with tunable multi-wavelengths. Current work is an important extension of our previous research, and could present some basic data and key techniques for the exploration of other new optoelectronic devices based on noble metal nonlinear optical materials.