Author Affiliations
Abstract
1 Shandong Provincial Key Laboratory of Optics and Photonic Devices, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
2 Institute of Data Science and Technology, Shandong Normal University, Jinan 250014, China
In this paper, tin disulfide (SnS2), a two-dimensional (2D) n-type direct bandgap layered metal dichalcogenide with a gap value of 2.24 eV, was employed as a saturable absorber. Its appearance and nonlinear saturable absorption characteristics were also investigated experimentally. SnS2-PVA (polyvinyl alcohol) film was successfully prepared and employed as a mode-locker for achieving a mode-locked Er-doped fiber laser with a pulse width of 623 fs at a pulse repetition rate of 29.33 MHz. The results prove that SnS2 nanosheets will have wide potential ultrafast photonic applications due to their suitable bandgap value and excellent nonlinear saturable absorption characteristics.
Semiconductor materials Mode-locked lasers Lasers, erbium Photonics Research
2018, 6(2): 02000072
为满足微波管放大器对宽频段输入窗的需求，并保证馈源的真空密封需求，提出并设计了一种适用于宽频段微波放大器的同轴输入窗。该宽频段同轴输入窗采用渐变圆环形陶瓷，材料介电常数为9.3，窗片厚度为2.5 mm,内径为2.14 mm，外径为5 mm，渐变段长度为6.5 mm。利用三维高频电磁仿真软件CST对其建模分析，并对同轴内外结构尺寸和陶瓷渐变结构进行优化仿真，得出该宽频带同轴输入窗能够在10～45 GHz频带内实现插入损耗小于0.5 dB。
输入窗 同轴 宽频段 input window coaxial wide-band 强激光与粒子束
2016, 28(3): 033029
