中国激光, 2018, 45 (10): 1001009, 网络出版: 2018-10-12
新型二硫化钼可饱和吸收体的制备及其超快特性研究 下载: 829次
Preparation and Study on the Ultrafast Characteristics of a New Type of Molybdenum Disulfide Saturable Absorber
激光器 固体激光器 被动锁模 二硫化钼可饱和吸收体 锂离子-插层法 lasers solid-state laser passively mode-locked molybdenum disulphide saturable absorber lithium-ion intercalation
摘要
以二硫化钼(MoS2)为代表的新型“类石墨烯”二维材料具有带隙可调、调制深度高、宽带可饱和吸收等优点, 在超快脉冲激光器中获得了广泛应用。采用锂离子-插层法制备MoS2纳米片溶液, 通过超声、离心、旋涂、干燥等工艺制作了高质量MoS2可饱和吸收体(SA)。利用拉曼光谱和原子力显微镜等方法对制备的MoS2薄膜进行了表征, 结果表明, 该MoS2薄膜为少层结构(2~3层)且具有良好的均匀性。将该MoS2 SA置于W型全固态激光器系统中, 实现了1063.9 nm稳定的被动锁模运转。实验中, 当吸收抽运功率达到6.86 W时, 脉冲平均输出功率为894 mW, 单脉冲能量及峰值功率分别为10.28 nJ和2.056 kW, 锁模脉冲宽度为5 ps。
Abstract
The new type of graphene like material, represented by molybdenum disulfide (MoS2), has many advantages of adjustable band gap, high modulation depth, and wide band saturable absorption. It is widely used in ultra-fast pulse laser. The MoS2 nanoscale solution is obtained by lithium-ion intercalation method. High quality MoS2 saturated absorber (SA) was prepared by ultrasonic, centrifugation, spin coating and drying. The MoS2 film is characterized by Raman spectroscopy and atomic force microscopy. The results showed that the film is a few-layer structure (2-3 layer) with good uniformity. The new MoS2 SA is placed in a W-type all solid state laser system, stable passive mode-locked operation at 1063.9 nm is achieved. When the pump power reached 6.86 W, the average output power of the mode-locked laser is 894 mW, the energy and peak power of monopulse are 10.28 nJ and 2.056 kW, respectively, and the pulse width is 5 ps.
杨闵皓, 常建华, 石少杭, 杨镇博, 刘振兴, 戴瑞, 丁蓉, 林海芝. 新型二硫化钼可饱和吸收体的制备及其超快特性研究[J]. 中国激光, 2018, 45(10): 1001009. Yang Minhao, Chang Jianhua, Shi Shaohang, Yang Zhenbo, Liu Zhenxing, Dai Rui, Ding Rong, Lin Haizhi. Preparation and Study on the Ultrafast Characteristics of a New Type of Molybdenum Disulfide Saturable Absorber[J]. Chinese Journal of Lasers, 2018, 45(10): 1001009.