挤压-堆积复合法制备As2S3红外硫系玻璃光子 晶体光纤及其特性研究

在利用多极法优化设计光子晶体光纤结构的基础上, 充分结合挤压和堆积两种方法的优点, 提出了基于挤压-堆积的新型硫系光子晶体光纤制备技术, 利用As2S3硫系玻璃制备了三层孔环结构光子晶体光纤. 通过理论模拟分析得出了该光纤的色散特性和零色散点, 测试了1550nm近红外光纤激光在该光纤中的传输效果和纤芯光斑能量分布, 利用该光斑测试验证了该光纤在近红外的光能传输局部限制能力和光子晶体的光学初步控制现象.

Fabrication of Infrared Photonic Crystal Fiber Based on As2S3 Chalcogenide Glass Extrusion and Stack:Research

Photonic Crystal Fiber (PCF) is currently popular for their superiority of high power laser transmission, fiber amplifier, fiber laser and so on. Chalcogenide glass is a new kind of infrared (IR) glass fitting for IR fiber application, which possesses the good transparence in IR (1-20μm), high refractive index, high non-linearity, low phonon energy, adjustable components and good glass stability. Multi-pole method is first utilized to optimize the structure and properties of the PCF, then a combined fiber fabricating method is adopted based on extruding and stacking of the As2S3 chalcogenide glass. With this novel technique, a faviform PCF is obtained with three-layered circle-holes. The dispersion property and zero-dispersion spot are calculated and simulated on the basis of the multi-pole theory, and a near IR CCD is applied to observe the real type of the laser light transmission in the PCF with a wavelength of 1550nm. The size of the mode field and energy distribution in the fiber core are recorded and analyzed in a detail manner. The overall results may be of good help in validating the photon controlling theory and uncovering the truth of IR light transmitting effect in the IR PCF.