摘要:硫系玻璃具有良好的红外透光性、较低的振动声子能量、较高的非线性折射率、较小的光学带隙等优点,所以被广泛运用于红外传输、红外激光、非线性光学等领域。然而高质量的光纤预制棒很难制备;另外,硫系玻璃光纤的机械性能较差,影响了光纤的应用。本文采用了堆积挤出法制备了高质量的As40Se60/As38Se62光纤预制棒,利用高机械性能热塑性聚合物聚醚酰亚胺(PEI)作为光纤保护层,大幅提高了硫系玻璃光纤的机械性能。所得光纤在2-8μm透光良好,背景损耗约4dB/m,抗拉强度为约为80.2 MPa,最小弯曲半径约为7.3mm。34352 毕业论文关键词:硫系玻璃 光纤 堆积挤出法 机械性能 光纤损耗
Fabrication of infrared chalcogenide fibers
abstract: Chalcogenide Glasses have been widely used in many fields such as infrared transmission, infrared lasers and nonlinear optics, due to their good infrared transparency, low vibrational phonon energy, high nonlinear refractive index, and narrow optical bandgap. However, high-quality fiber perform is hard to be prepared. Besides, chalcogenide fibers show inferior mechanical property, which limits their applications. In this paper, high-quality As40Se60/As38Se62 fiber preform was prepared by a stacked extrusion method. The mechanical property of the fiber was remarkably improved by using a high-strength thermoplastic polyetherimide (PEI) as the protecting layer. The fabricated fiber show good transparency in the 2-8μm spectral region, the background loss is about 4dB/m, the tensile strength is about 80.2MPa and the minimum bending radius is about 7.3mm.
Key words:Chalcogenide glasses Fibersstaked extrusion mechanical property Optical fiber loss
目录
摘要..Ⅰ
目录..Ⅱ
1. 绪论 1
1.1 引言 1
1.2 As-Se玻璃光纤的研究进展 2
1.3 课题提出 3