基于化学修饰的高稳定黑磷可饱和吸收体的中红外锁模光纤激光器研究

The mid-infrared laser has many important applications in national defense, medical treatment and communication. In recent years, study of mid-infrared pulse laser has become a hot spot in ultrafast optics. One of the key components for ultrashort pulse generation in lasers is the saturable absorber. Two-dimensional black phosphorus plays an important role in the area of mid-infrared laser because of its direct band gap and adjustable, broadband absorption and other unique optical properties. At present, the application of black phosphorus materials in the mid-infrared pulsed fiber laser has been realized. However, there is still no systematic research on black phosphorus mode locked fiber lasers. Especially the stability problem of black phosphorus material is not resolved. To solve this problem, this project aims to master controllable preparation technology of black phosphorus materials with high stability and antioxidant properties; High stable black phosphorus was prepared by using the chemical modification method. By using the nonlinear optical measurement technology, mid-infrared nonlinear optical properties of black phosphorus will be studied. Mechanism of optical effect of decorated black phosphorus at mid-infrared region will be revealed. Based on the previous study, decorated black phosphorus materials as saturable absorber device will be fabricated and implemented into the mid-infrared mode-locked fiber lasers to generate high energy pulses and ultrashort pulses.

中红外波段的激光在国防、医疗、通信等方面有着特殊的重要应用。近年来，中红外脉冲激光器成为超快光学中研究的热点。产生超短激光脉冲的核心器件之一是可饱和吸收体。可饱和吸收体二维材料黑磷因其直接带隙且可调，宽带吸收等独特性质，在中红外激光领域具有重要的研究价值。目前的研究对黑磷材料在中红外光纤脉冲激光的应用已有一定的认识，但是尚缺乏系统的研究，尤其是黑磷材料的稳定性问题尚未解决。针对此问题，本项目拟在前期基础上，掌握具备高稳定抗氧化特性黑磷材料的可控制备技术；采用化学修饰的方法制备高稳定黑磷；利用非线性光纤测量技术，深入研究黑磷材料的中红外非线性光学特性，揭示修饰黑磷中红外光学效应的作用机理；以此为基础制备基于黑磷材料的可饱和吸收器件，实现基于修饰黑磷锁模的中红外大能量，超短脉冲激光。

中红外脉冲激光器成为超快光学中研究的热点。可饱和吸收体二维材料黑磷因其直接带隙且可调，宽带吸收等独特性质，在中红外激光领域具有重要的研究价值。目前的研究对黑磷材料在中红外光纤脉冲激光的应用已有一定的认识，但是尚缺乏系统的研究，尤其是黑磷材料的稳定性问题尚未解决。针对此问题，本项目在前期基础上，掌握具备高稳定抗氧化特性黑磷材料的可控制备技术；采用化学修饰的方法制备高稳定黑磷；利用非线性光纤测量技术，深入研究黑磷材料的中红外非线性光学特性，揭示修饰黑磷中红外光学效应的作用机理；以此为基础制备基于黑磷材料的可饱和吸收器件，实现了基于修饰黑磷锁模的中红外大能量，超短脉冲激光。